2018
49
2
0
218
1

Transverse Sensing of Simply Supported Truncated Conical Shells
https://jcamech.ut.ac.ir/article_64204.html
10.22059/jcamech.2017.238393.167
1
Modal signals of transverse sensing of truncated conical shells with simply supported boundary condition at both ends are investigated. The embedded piezoelectric layer on the surface of conical shell is used as sensors and output voltages of them in considered modes are calculated. The Governing sensing signal displacement equations are derived based on the Kirchhoff theory, thinshell assumption, piezoelectric direct effect, the Gauss theory and the open circuit assumption. A conical shell with fully covered piezoelectric layer is considered as a case study and the layer is segmented into 400 patches. Modal voltages of the considered model are calculated and evaluated. The ideal locations for sensor patches are in the middle of conical shell surface in the longitudinal direction and locations near the ends of the conical shell are not recommended. The longitudinal membrane strain signal has a leading role on the total signal in comparison with other strain signal components. The output signals of the sensor can be used as a controller input for later active vibration control or structural health monitoring.
0

212
230


Rasa
Jamshidi
Khaje Nasir University of Technology, Mechanical Engineering Department, Tehran, Iran
Iran
rs.jamshidi@mail.kntu.ac.ir


Ali Asghar
Jafari
Khaje Nasir University of Technology, Mechanical Engineering Department, Tehran, Iran
Iran
ajafari@kntu.ac.ir
Conical shells
piezoelectric layer
Sensor
longitudinal direction
circumferential direction
Kirchhoff theory
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Asemi, H., et al., Nanoscale mass detection based on vibrating piezoelectric ultrathin films under thermoelectromechanical loads. Physica E: Lowdimensional Systems and Nanostructures, 2015. 68: p. 112122.##17. Farajpour, A., et al., A higherorder nonlocal strain gradient plate model for buckling of orthotropic nanoplates in thermal environment. Acta Mechanica, 2016. 227(7): p. 18491867.##18. Farajpour, A., et al., Buckling of orthotropic micro/nanoscale plates under linearly varying inplane load via nonlocal continuum mechanics. Composite Structures, 2012. 94(5): p. 16051615.##19. Farajpour, A., M. Danesh, and M. Mohammadi, Buckling analysis of variable thickness nanoplates using nonlocal continuum mechanics. Physica E: Lowdimensional Systems and Nanostructures, 2011. 44(3): p. 719727.##20. Asemi, S., et al., Influence of initial stress on the vibration of doublepiezoelectricnanoplate systems with various boundary conditions using DQM. 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1

Investigation on Instability of RayleighBenard Convection Using Lattice Boltzmann Method with a Modified Boundary Condition
https://jcamech.ut.ac.ir/article_64208.html
10.22059/jcamech.2017.243410.197
1
In this study, the effects of Prandtl number on the primary and secondary instability of the RayleighBenard convection problem has been investigated using the lattice Boltzmann method. Two different cases as Pr=5.8 and 0.7 representing the fluid in liquid and gas conditions are examined. A body forces scheme of the lattice Boltzmann method was presented. Two types of boundary conditions in the presence of body forces are analyzed by the moment method and applied to a Poiseuille flow. Characteristic velocity was set in such a way that the compressibility effects are negligible. The calculations show that the increment of Prandtl number from 0.7 to 5.8 causes to create a secondary instability and onset of the oscillation in the flow field. Results show that at Pr=5.8, when the Rayleigh number is increased, a periodic solution appeared at Ra=48,000. It is observed that the dimensionless frequency ratio for Ra= 105 with Pr=5.8 is around 0.0065. The maximum Nusselt number for Ra = 105 with Pr=5.8 are estimated to be 5.4942.
0

231
239


Mostafa
Varmazyar
Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Iran
varmazyar.mostafa@srttu.edu


Mohammadreza
habibi
Research Institute of Petroleum Industry, Tehran, Iran
Iran
habibimr@ripi.ir


Arash
Mohammadi
Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Iran
amohammadi@dena.kntu.ac.ir
RayleighBenard Convection
instability
Lattice Boltzmann method
Bennett Methodology
Dimensionless Frequency Ratio
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1

The effect of boundary conditions on the accuracy and stability of the numerical solution of fluid flows by LatticeBoltzmann method
https://jcamech.ut.ac.ir/article_68329.html
10.22059/jcamech.2018.249245.225
1
The aim of this study is to investigate the effect of boundary conditions on the accuracy and stability of the numerical solution of fluid flows in the context of single relaxation time Lattice Boltzmann method (SRTLBM). The fluid flows are simulated using regularized, noslip, ZouHe and bounce back boundary conditions for straight surfaces in a lid driven cavity and the twodimensional flow in a channel. The solutions for all types of the boundary conditions show good agreement with numerical references and exact solutions. The cavity pressure contours at low relaxation time show drastic perturbations for ZouHe boundary condition, whereas, the perturbation is ignorable for regularized boundary condition. At High Reynolds number, severe velocity gradients are major reason for numerical instabilities. Therefore, regularized boundary condition, which considers the velocity gradient in its calculation, has better numerical stability comparing the ZouHe boundary condition. Overall, the selection of appropriate boundary condition depends on the flow regime and Geometry. The proper boundary conditions at low Reynolds numbers are ZouHe and bounce back boundary conditions, and at high Reynolds numbers, regularized and noslip boundary conditions are recommended.
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240
251


Ali
Bahrami
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, P.O.Box:111554563, Iran
Iran
ali.bahrami92@ut.ac.ir


Ali
Ghanavati
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, P.O.Box:111554563, Iran
Iran
ali.ghanavati@ut.ac.ir


Azadeh
Jafari
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, P.O.Box:111554563, Iran
Iran
azadeh.jafari@ut.ac.ir


Mohamad Hasan
Rahimian
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, P.O.Box:111554563, Iran
Iran
rahimyan@ut.ac.ir
Lattice Boltzmann method
Noslip boundary condition
Regularized boundary condition
ZouHe boundary condition
[[1] M. C. Sukop, D. T. Thorne, 2010, Lattice Boltzmann Modeling: An Introduction for Geoscientists and Engineers, Springer Publishing Company, Incorporated,##[2] A. A. Mohamad, 2011, Lattice Boltzmann method: fundamentals and engineering applications with computer codes, Springer Science & Business Media,##[3] O. Malaspinas, B. Chopard, J. Latt, General regularized boundary condition for multispeed lattice Boltzmann models, Computers & Fluids, Vol. 49, No. 1, pp. 2935, 2011.##[4] D. A. WolfGladrow, 2004, Latticegas cellular automata and lattice Boltzmann models: an introduction, Springer,##[5] M. h. Bouzidi, M. Firdaouss, P. Lallemand, Momentum transfer of a Boltzmannlattice fluid with boundaries, Physics of fluids, Vol. 13, No. 11, pp. 34523459, 2001.##[6] Z. Guo, C. Zheng, B. Shi, An extrapolation method for boundary conditions in lattice Boltzmann method, Physics of Fluids, Vol. 14, pp. 20072010, 2002.##[7] I. Ginzburg, D. d’Humières, Multireflection boundary conditions for lattice Boltzmann models, Physical Review E, Vol. 68, 2003.##[8] H. Chen, C. Teixeira, K. Molvig, Realization of fluid boundary conditions via discrete Boltzmann dynamics, International Journal of Modern Physics C, Vol. 9, No. 08, pp. 12811292, 1998.##[9] X. Yin, J. Zhang, An improved bounceback scheme for complex boundary conditions in lattice Boltzmann method, Journal of Computational Physics, Vol. 231, No. 11, pp. 42954303, 2012.##[10] T. Zhang, B. Shi, Z. Guo, Z. Chai, J. Lu, General bounceback scheme for concentration boundary condition in the latticeBoltzmann method, Physical Review E, Vol. 85, No. 1, 2012.##[11] J. Latt, B. Chopard, O. Malaspinas, M. Deville, A. Michler, Straight velocity boundaries in the lattice Boltzmann method, Physical Review E, Vol. 77, No. 5, 2008.##[12] J. C. G. Verschaeve, Analysis of the lattice Boltzmann BhatnagarGrossKrook noslip boundary condition: Ways to improve accuracy and stability, Physical Review E, Vol. 80, No. 3, 2009.##[13] J. C. Verschaeve, B. Müller, A curved noslip boundary condition for the lattice Boltzmann method, Journal of Computational Physics, Vol. 229, No. 19, pp. 67816803, 2010.##[14] B. Chopard, A. Dupuis, A mass conserving boundary condition for lattice Boltzmann models, International Journal of Modern Physics B, Vol. 17, No. 01n02, pp. 103107, 2003.##[15] S. Arun, A. Satheesh, Analysis of flow behaviour in a two sided lid driven cavity using lattice boltzmann technique, Alexandria Engineering Journal, Vol. 54, No. 4, pp. 795806, 2015.##[16] S. Hou, Q. Zou, S. Chen, G. Doolen, A. C. Cogley, Simulation of cavity flow by the lattice Boltzmann method, Journal of computational physics, Vol. 118, No. 2, pp. 329347, 1995.##[17] M. Izham, T. Fukui, K. Morinishi, Application of regularized lattice Boltzmann method for incompressible flow simulation at high Reynolds number and flow with curved boundary, Journal of Fluid Science and Technology, Vol. 6, No. 6, pp. 812822, 2011.##[18] D. Yu, R. Mei, L.S. Luo, W. Shyy, Viscous flow computations with the method of lattice Boltzmann equation, Progress in Aerospace Sciences, Vol. 39, No. 5, pp. 329367, 2003.##[19] J. Latt, Hydrodynamic limit of lattice Boltzmann equations, Thesis, Universite De Geneve, 2007. English##[20] E. W. Llewellin, LBflow: An extensible lattice Boltzmann framework for the simulation of geophysical flows. Part I: theory and implementation, Computers & Geosciences, Vol. 36, No. 2, pp. 115122, 2010.##[21] B. Müller, J. Verschaeve, Boundary conditions for the lattice Boltzmann method: Mass conserving boundary conditions for moving walls, Thesis, Institutt for energi og prosessteknikk, 2010.##[22] Q. Zou, X. He, On pressure and velocity boundary conditions for the lattice Boltzmann BGK model, Physics of fluids, Vol. 9, No. 6, pp. 15911598, 1997.##[23] C. H. Marchi, R. Suero, L. K. Araki, The liddriven square cavity flow: numerical solution with a 1024 x 1024 grid, Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol. 31, pp. 186198, 2009.##[24] F. M. White, 2015, Fluid mechanics, McGrawHill Higher Education, Fourth ed.##]
1

Free Vibration Analysis of BNNT with Different CrossSections via Nonlocal FEM
https://jcamech.ut.ac.ir/article_68033.html
10.22059/jcamech.2018.266789.328
1
In the present study, free vibration behaviors of of carbon nanotube (CNT) and boron nitride nanotube (BNNT) have been investigated via Eringen’s nonlocal continuum theory. Size effect has been considered via nonlocal continuum theory. Nanotubes have become popular in the world of science thanks to their characteristic properties. In this study, free vibrations of Boron Nitride Nanotube (BNNT) and Carbon Nanotube (CNT) are calculated using the Nonlocal Elasticity Theory. Frequency values are found via both analytical and finite element method (FEM). Galerkin weighted residual method is used to obtain the finite element equations. BNNT and CNT are modeled as Euler  Bernoulli Beam and solutions are gained by using four different crosssection geometries with three boundary conditions. Selected geometries are circle, rectangle, triangle, and square. Frequency values are given in tables and graphs. The effect of crosssection, boundary conditions and length scale parameter on frequencies has been investigated in detail for BNNT.
0

252
260


Büşra
Uzun
Uludağ University, Civil Engineering Department, Bursa, TURKIYE
Turkey
uzunbusra34@gmail.com


Hayri
Numanoglu
Akdeniz University, Civil Engineering Department, Antalya, TURKIYE
Turkey
metin_numanoglu@hotmail.com


Omer
Civalek
Akdeniz University, Civil Engineering Department, Antalya, TURKIYE
Turkey
civalek@yahoo.com
Nonlocal Elasticity Theory
EulerBernoulli Beam
Boron Nitride Nanotube
Carbon Nanotube
Finite Element Method
[[1] R. P. Feynman, There’s plenty of room at the bottom, Engineering and Science, Vol. 23, No. 5, pp. 22–36, 1960.##[2] S. Gopalakrishnan, S. Narendar, 2013, Wave propagation in nanostructures: nonlocal continuum mechanics formulations, Springer International Publishing Switzerland.##[3] S. Iijima, Helical microtubules of graphitic carbon, Nature, Vol. 354, pp. 5658, 1991.##[4] B. Akgöz, 2009, Karbon Nanotüplerin Kiriş Modeli ve Titreşim Hesabı, Akdeniz Üniversitesi Mühendislik Fakültesi İnşaat Mühendisliği Bitirme Çalışması, Antalya.##[5] A. Rubio, J. L. Corkill, M. L. Cohen, Theory of graphitic boron nitride nanotubes, Physical Review B, Vol. 49, No. 7, pp. 50815084, 1994.##[6] X. Blase, A. Rubio, S. G. Louie, M. L. Cohen, Stability and band gap constancy of boron nitride nanotubes, EPL (Europhysics Letters), Vol. 28, No. 5, pp. 335340, 1994.##[7] N. G. Chopra, R. J. Luyken, K. Cherrey, V. H. Crespi, M. L. Cohen, S. G. Louie, A. Zettl, Boron nitride nanotubes. Science, Vol. 269, pp. 966967, 1995.##[8] M. Schulz, V. Shanov, Z. Yin, 2013, Nanotube Superfiber Materials: Changing Engineering Design2013; William Andrew.##[9] Ç. Işık, 2011, Nano ve Mikro Yapıların Yerel Olmayan Elastisite Teorisi İle Eğilme ve Titreşim Hesabı, Akdeniz Üniversitesi Fen Bilimleri Enstitüsü İnşaat Mühendisliği Anabilim Dalı, Yüksek Lisans Tezi, Antalya.##[10] A. C. Eringen, On differential equations of nonlocal elasticity and solutions of screw dislocation and surface waves, Journal of Applied Physics, Vol. 54, No. 9, pp. 47034710, 1983.##[11] J. N. Reddy, Nonlocal theories for bending, buckling and vibration of beams, International Journal of Engineering Science,Vol. 45, No. 28, pp. 288307, 2007.##[12] S. Kong, S. Zhou, Z. Nie, K. Wang, The sizedependent natural frequency of Bernoulli–Euler microbeams, International Journal of Engineering Science, Vol. 46, No. 5, pp. 427437, 2008.##[13] Ö. Civalek, Ç. Demir, Bending analysis of microtubules using nonlocal Euler–Bernoulli beam theory, Applied Mathematical Modelling, Vol. 35, No. 5, pp. 20532067, 2011.##[14] M. A. Eltaher, A. E. Alshorbagy, F. F. Mahmoud, Vibration analysis of Euler–Bernoulli nanobeams by using finite element method, Applied Mathematical Modelling, Vol. 37, No. 7, pp. 47874797, 2013.##[15] I. A. Khan, S. M. Hashemi, On Finite Element Vibration Analysis of Carbon Nanotubes, In Perusal of the Finite Element Method, InTech, pp. 6988, 2016.##[16] Ç. Dinçkal, Free vibration analysis of carbon nanotubes by using finite element method, Iranian Journal of Science and Technology, Transactions of Mechanical Engineering, Vol. 40, No. 1, pp. 4355, 2016.##[17] A. Norouzzadeh, R. Ansari, Finite element analysis of nanoscale Timoshenko beams using the integral model of nonlocal elasticity, Physica E: Lowdimensional Systems and Nanostructures, Vol. 88, pp. 194200, 2017.##[18] Ç. Demir, Ö. Civalek, Nonlocal finite element formulation for vibration, International Journal of Engineering & Applied Sciences, Vol. 8, No. 2, pp. 109117, 2016.##[19] J. N. Reddy, S. D. Pang, Nonlocal continuum theories of beams for the analysis of carbon nanotubes, Journal of Applied Physics, Vol. 103, No. 2, 023511, 2008.##[20] B. Akgöz, Ö. Civalek, Free vibration analysis of axially functionally graded tapered Bernoulli–Euler microbeams based on the modified couple stress theory, Composite Structures, Vol. 98, pp. 314322, 2013.##[21] C. M. Wang, Y. Y. Zhang, X. Q. He, Vibration of nonlocal Timoshenko beams, Nanotechnology, Vol. 18, No. 10, pp. 105401105409, 2007.##[22] S. Thai, H. T. Thai, T. P. Vo, V. I. Patel, A simple shear deformation theory for nonlocal beams, Composite Structures, Vol. 183, pp. 262270, 2018.##[23] Ç. Işık, 2018, Mikro ve Nano Ölçekli Mekanik Sistemlerin Modellenmesinde Yerel Olmayan Sonlu Eleman Formülasyonu, Akdeniz Üniversitesi Fen Bilimleri Enstitüsü İnşaat Mühendisliği Anabilim Dalı, Doktora Tezi, Antalya.##[24] M. H. Omurtag, 2010, Çubuk sonlu elemanlar, Birsen Yayınevi.##[25] K. Mercan, Ö. Civalek, DSC method for buckling analysis of boron nitride nanotube (BNNT) surrounded by an elastic matrix, Composite Structures, Vol. 143, pp. 300309, 2016.##[26] Ö. Civalek, Ç. Demir, Buckling and bending analyses of cantilever carbon nanotubes using the eulerbernoulli beam theory based on nonlocal continuum model, Asian Journal of Civil Engineering, Vol. 12, No 5, pp. 651661, 2011.##[27] K. Mercan, Ö. Civalek, Buckling analysis of Silicon carbide nanotubes (SiCNTs) with surface effect and nonlocal elasticity using the method of HDQ, Composites Part B, Vol. 114, pp. 3445, 2017.##[28] H. M. Sedighi, A. Reza, J. Zare, Dynamic analysis of preload nonlinearity in nonlinear beam vibration, Journal of Vibroengineering, Vol. 13, pp.778787, 2011.##[29] B. Akgöz, Ö. Civalek, Buckling analysis of cantilever carbon nanotubes using the strain gradient elasticity and modified couple stress theories, Journal of Computational and Theoretical Nanoscience, Vol. 8, pp. 18211827, 2011.##[30] Ö. Civalek, 1998, Finite Element analysis of plates and shells. Elazığ: Fırat University, in Turkish.##[31] M. Hosseini, H. H. Gorgani, M. Shishesaz, A. Hadi, SizeDependent Stress Analysis of SingleWall Carbon Nanotube Based on Strain Gradient Theory, International Journal of Applied Mechanics, Vol. 09, p. 1750087, 2017.##[32] M. Hosseini, M. Shishesaz, K. N. Tahan, A. Hadi, Stress analysis of rotating nanodisks of variable thickness made of functionally graded materials, International Journal of Engineering Science, Vol. 109, pp. 2953, 2016.##[33] M. Shishesaz, A. Malekshahi, A. Hadi, M. Hosseini, A review of sizedependent elasticity for nanostructures, Journal of Computational Applied Mechanics, Vol. 49, pp. 197211, 2018.##[34] M. Shishesaz, M. Hosseini, K. N. Tahan, A. Hadi, Analysis of functionally graded nanodisks under thermoelastic loading based on the strain gradient theory, Acta Mechanica, Vol. 228, pp. 41414168, 2017. ##[35] A. Hadi, M. Z. Nejad, M. Hossein, Vibrations of threedimensionally graded nanobeams, International Journal of Engineering Science, Vol. 128, pp. 1223, 2018. ##[36] M. M. Adeli, A. Hadi, M. Hosseini, H. H. Gorgani, Torsional vibration of nanocone based on nonlocal strain gradient elasticity theory, The European Physical Journal Plus, Vol. 132, pp. 393, 2017.##[37] A. Hadi, M. Z. Nejad, M. Hossein, A. Rastgoo, Buckling analysis of FGM EulerBernoulli nanobeams with 3Dvarying properties based on consistent couplestress theory, Steel and Composite Structures, Vol. 26, No. 6, pp. 663672, 2018.##[38] M. Z. Nejad, A. Hadi, A. Rastgoo, Buckling analysis of arbitrary twodirectional functionally graded EulerBernoulli nanobeams based on nonlocal elasticity theory, International Journal of Engineering Science, Vol. 103, pp. 110, 2016.##[39] A. Daneshmehr, A. Rajabpoor, A. Hadi, Size dependent free vibration analysis of nanoplates made of functionally graded materials based on nonlocal elasticity theory with high order theories, International Journal of Engineering Science, Vol. 95, pp. 2335, 2015.##[40] A. Zargaripoor, A. Daneshmehr, I. I. Hosseini, A. Rajabpoor, Free vibration analysis of nanoplates made of functionally graded materials based on nonlocal elasticity theory using finite element method, Journal of Computational Applied Mechanics, Vol. 49, No. 1, 2018.##[41] M. Z. Nejad, A. Hadi, Nonlocal analysis of free vibration of bidirectional functionally graded EulerBernoulli nanobeams, International Journal of Engineering Science, Vol. 105, pp. 111, 2016.##[42] M. Z. Nejad, A. Hadi, Eringen's nonlocal elasticity theory for bending analysis of bidirectional functionally graded EulerBernoulli nanobeams. International Journal of Engineering Science, Vol. 106, pp. 19, 2016.##[43] M. Hosseini, H. H. Gorgani, M. Shishesaz, A. Hadi, Sizedependent stress analysis of singlewall carbon nanotube based on strain gradient theory, International Journal of Applied Mechanics, Vol. 9, No. 06, p.1750087, 2017.##[44] M. Z. Nejad, A. Hadi, A. Farajpour, Consistent couplestress theory for free vibration analysis of EulerBernoulli nanobeams made of arbitrary bidirectional functionally graded materials, Structural Engineering and Mechanics, Vol. 63, No. 2, pp. 161169, 2017.##[45] A. Hadi, M. Z. Nejad, M. Hosseini, Vibrations of threedimensionally graded nanobeams, International Journal of Engineering Science, Vol. 128, pp. 1223, 2018.##[46] M. R. Farajpour, A. R. Shahidi, A. Hadi, A. Farajpour, Influence of initial edge displacement on the nonlinear vibration, electrical and magnetic instabilities of magnetoelectroelastic nanofilms, Mechanics of Advanced Materials and Structures, pp. 113, 2018.##[47] A. Hadi, M. Z. Nejad, A. Rastgoo, M. Hosseini, Buckling analysis of FGM EulerBernoulli nanobeams with 3Dvarying properties based on consistent couplestress theory, Steel and Composite Structures, Vol. 26, No. 6, pp. 663672, 2018.##[48] A. Hadi, A. Rastgoo, N. Haghighipour, A. Bolhassani, Numerical modelling of a spheroid living cell membrane under hydrostatic pressure, Journal of Statistical Mechanics: Theory and Experiment, Vol. 2018, No. 8, pp. 083501, 2018.##]
1

Nonlinear stability of rotating two superposed magnetized fluids with the technique of the homotopy perturbation
https://jcamech.ut.ac.ir/article_68655.html
10.22059/jcamech.2018.267205.332
1
In the present work, the RayleighTaylor instability of two rotating superposed magnetized fluids within the presence of a vertical or a horizontal magnetic flux has been investigated. The nonlinear theory is applied, by solving the equation of motion and uses the acceptable nonlinear boundary conditions. However, the nonlinear characteristic equation within the elevation parameter is obtained. This equation features a transcendental integroDuffing kind. The homotopy perturbation technique has been applied by exploitation the parameter growth technique that results in constructing the nonlinear frequency. Stability conditions are derived from the frequency equation. It's illustrated that the rotation parameter plays a helpful result. It's shown that the stability behavior within the extremely uniform rotating fluids equivalents to the system while not rotation. A periodic solution for the elevation function has been performed. Numerical calculations area unit created for linear analysis furthermore the nonlinear scope. Moreover, the elevation function has been premeditated versus the time parameter. The strategy adopted here is vital and powerful for solving nonlinear generator systems with a really high nonlinearity arising in nonlinear science and engineering.
0

261
273


Yusry
ElDib
Department of Mathematics, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt
Egypt
yusryeldib52@hotmail.com


Amail
Mady
Department of Mathematics, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt
Egypt
anaali19@hotmail.com
Rotating Fluids
Magnetic Fluids
stability analysis
Homotopy Perturbation Method
[[1] A. S. Ramsey, W. H. Besant, 1954, A Treatise on Hydromechanics: Hydrodynamics, G. Bell,##[2] CC Lin:" The Theory of Hydrodynamic Stability", Cambridge University Press, 1955, 155 頁, 15× 23cm, 22s 6d, Vol. 11, No. 5, pp. 217, 1956.##[3] S. Chandrasekhar, Hydrodynamic and Hydromagnetic Stability Oxford University Press Oxford Google Scholar, 1961.##[4] H. F. Bauer, Coupled oscillations of a solidly rotating liquid bridge, Acta Astronautica, Vol. 9, No. 9, pp. 547563, 1982.##[5] Y. O. ElDib, Capillary instability of an oscillating liquid column subjected to a periodic rigidbody rotation, Fluid dynamics research, Vol. 18, No. 1, pp. 17, 1996.##[6] G. M. Moatimid, Y. O. ElDib, Effects of an unsteady rotation on the electrohydrodynamic stability of a cylindrical interface, International journal of engineering science, Vol. 32, No. 7, pp. 11831193, 1994.##[7] F. F. Hatay, S. Biringen, G. Erlebacher, W. Zorumski, Stability of high‐speed compressible rotating Couette flow, Physics of Fluids A: Fluid Dynamics, Vol. 5, No. 2, pp. 393404, 1993.##[8] G. Sarma, P. C. Lu, S. Ostrach, Film Stability in a Vertical Rotating Tube with a Core‐Gas Flow, The Physics of Fluids, Vol. 14, No. 11, pp. 22652277, 1971.##[9] A. E.M. A. Mohammed, A. G. ElSakka, G. M. Sultan, Electrohydrodynamic stability of m= 0 mode of a rotating jet under a periodic field, Physica Scripta, Vol. 31, No. 3, pp. 193, 1985.##[10] S. Leblanc, C. Cambon, Effects of the Coriolis force on the stability of Stuart vortices, Journal of Fluid Mechanics, Vol. 356, pp. 353379, 1998.##[11] Y. O. ElDib, The stability of a rigidly rotating magnetic fluid column effect of a periodic azimuthal magnetic field, Journal of Physics A: Mathematical and General, Vol. 30, No. 10, pp. 3585, 1997.##[12] K. Schwarz, Effect of rotation on the stability of advective flow in a horizontal fluid layer at a small Prandtl number, Fluid Dynamics, Vol. 40, No. 2, pp. 193201, 2005.##[13] R. HIDE, THE CHARACTER OF THE EQUILIBRIUM OF A HEAVY, VISCOUS, INCOMPRESSIBLE, ROTATING FLUID OF VARIABLE DENSITY: II. TWO SPECIAL CASES, The Quarterly Journal of Mechanics and Applied Mathematics, Vol. 9, No. 1, pp. 3550, 1956.##[14] L. Debnath, Exact solutions of the unsteady hydrodynamic and hydromagnetic boundary layer equations in a rotating fluid system, ZAMM‐Journal of Applied Mathematics and Mechanics/Zeitschrift für Angewandte Mathematik und Mechanik, Vol. 55, No. 7‐8, pp. 431438, 1975.##[15] L. Dávalos‐Orozco, J. Aguilar‐Rosas, Rayleigh–Taylor instability of a continuously stratified fluid under a general rotation field, Physics of Fluids A: Fluid Dynamics, Vol. 1, No. 7, pp. 11921199, 1989.##[16] L. DávalosOrozco, RayleighTaylor instability of two superposed fluids under imposed horizontal and parallel rotation and magnetic fields, Fluid dynamics research, Vol. 12, No. 5, pp. 243, 1993.##[17] B. Chakraborty, J. Chandra, Rayleigh–Taylor instability in the presence of rotation, The Physics of Fluids, Vol. 19, No. 12, pp. 18511852, 1976.##[18] B. Chakraborty, Hydromagnetic Rayleigh–Taylor instability of a rotating stratified fluid, The Physics of Fluids, Vol. 25, No. 5, pp. 743747, 1982.##[19] L. DavalosOrozco, RayleighTaylor stability of a twofluid system under a general rotation field, Dynamics of atmospheres and oceans, Vol. 23, No. 14, pp. 247255, 1996.##[20] P. Sharma, R. Chhajlani, Effect of finite Larmor radius on the RayleighTaylor instability of two component magnetized rotating plasma, Zeitschrift für Naturforschung A, Vol. 53, No. 12, pp. 937944, 1998.##[21] P. Hemamalini, S. A. Devi, RayleighTaylor Instability of a Twofluid Layer Subjected to Rotation and a Periodic Tangential Magnetic Field, FDMP: Fluid Dynamics & Materials Processing, Vol. 10, No. 4, pp. 491501, 2014.##[22] G. M. Moatimid, A. F. ElBassiouny, Nonlinear interfacial Rayleigh–Taylor instability of twolayers flow with an ac electric field, Physica Scripta, Vol. 76, No. 2, pp. 105, 2007.##[23] S. A. Devi, P. Hemamalini, Nonlinear Rayleigh–Taylor instability of two superposed magnetic fluids under parallel rotation and a normal magnetic field, Journal of magnetism and magnetic materials, Vol. 314, No. 2, pp. 135139, 2007.##[24] J. M. Stone, T. Gardiner, The magnetic RayleighTaylor instability in three dimensions, The Astrophysical Journal, Vol. 671, No. 2, pp. 1726, 2007.##[25] H. Yu, D. Livescu, Rayleigh–Taylor instability in cylindrical geometry with compressible fluids, Physics of Fluids, Vol. 20, No. 10, pp. 104103, 2008.##[26] A. Joshi, M. C. Radhakrishna, N. Rudraiah, Rayleigh–Taylor instability in dielectric fluids, Physics of Fluids, Vol. 22, No. 6, pp. 064102, 2010.##[27] H. G. Lee, K. Kim, J. Kim, On the long time simulation of the Rayleigh–Taylor instability, International Journal for Numerical Methods in Engineering, Vol. 85, No. 13, pp. 16331647, 2011.##[28] L. Wang, W. Ye, X. He, Density gradient effects in weakly nonlinear ablative RayleighTaylor instability, Physics of Plasmas, Vol. 19, No. 1, pp. 012706, 2012.##[29] J. Tao, X. He, W. Ye, F. Busse, Nonlinear RayleighTaylor instability of rotating inviscid fluids, Physical Review E, Vol. 87, No. 1, pp. 013001, 2013.##[30] A. Piriz, Y. Sun, N. Tahir, RayleighTaylor stability boundary at solidliquid interfaces, Physical Review E, Vol. 88, No. 2, pp. 023026, 2013.##[31] Y. Murakami, Second harmonic resonance on the marginally neutral curve in the KelvinHelmholtz flow, Physics Letters A, Vol. 131, No. 6, pp. 368372, 1988.##[32] Y. O. ElDib, Nonlinear stability of surface waves in magnetic fluids: effect of a periodic tangential magnetic field, Journal of plasma physics, Vol. 49, No. 2, pp. 317330, 1993.##[33] Y. O. ElDib, Nonlinear hydromagnetic Rayleigh–Taylor instability for strong viscous fluids in porous media, Journal of magnetism and magnetic materials, Vol. 260, No. 12, pp. 118, 2003.##[34] J.H. He, Homotopy perturbation technique, Computer methods in applied mechanics and engineering, Vol. 178, No. 34, pp. 257262, 1999.##[35] J.H. He, Application of homotopy perturbation method to nonlinear wave equations, Chaos, Solitons & Fractals, Vol. 26, No. 3, pp. 695700, 2005.##[36] J.H. He, Homotopy perturbation method with two expanding parameters, Indian journal of Physics, Vol. 88, No. 2, pp. 193196, 2014.##[37] Y. O. ElDib, Multiple scales homotopy perturbation method for nonlinear oscillators, Nonlinear Sci. Lett. A, Vol. 8, No. 4, pp. 352364, 2017.##[38] J.H. He, Homotopy perturbation method with an auxiliary term, in Proceeding of, Hindawi, pp.##[39] Y. ElDib, Stability Analysis of a Strongly Displacement TimeDelayed Duffing Oscillator Using Multiple Scales Homotopy Perturbation Method, Journal of Applied and Computational Mechanics, Vol. 4, No. 4, pp. 260274, 2018.##[40] R. Rosensweig, Ferrohydrodynamics Cambridge University Press Cambridge, New York, Melbourne, 1985.##[41] J. R. Melcher, 1963, Fieldcoupled surface waves, MIT,##[42] P. Weidman, M. Goto, A. Fridberg, On the instability of inviscid, rigidly rotating immiscible fluids in zero gravity, Zeitschrift für angewandte Mathematik und Physik ZAMP, Vol. 48, No. 6, pp. 921950, 1997.##[43] Y. O. ElDib, Viscous interface instability supporting freesurface currents in a hydromagnetic rotating fluid column, Journal of plasma physics, Vol. 65, No. 1, pp. 128, 2001.##[44] Y. O. ElDib, A. Y. Ghaly, Nonlinear interfacial stability for magnetic fluids in porous media, Chaos, Solitons & Fractals, Vol. 18, No. 1, pp. 5568, 2003.##]
1

Heat Transfer Study of ConvectiveRadiative Fin under the influence of Magnetic Field using Legendre Wavelet Collocation Method
https://jcamech.ut.ac.ir/article_64207.html
10.22059/jcamech.2017.241682.186
1
The development and production of high performance equipment necessitate the use of passive cooling technology. In this paper, heat transfer study of convectiveradiative straight fin with temperaturedependent thermal conductivity under the influence of magnetic field is carried out using Legendre wavelet collocation method. The numerical solution is used to investigate the effects of magnetic, convective and radiative parameters on the thermal performance of the fin. From the results, it is established that increase in magnetic, convective and radiative parameters increase the rate of heat transfer from the fin and consequently improve the thermal performance of the fin. The results obtained are compared with the results established results in literature and good agreements are found. The analysis can help in enhancing the understanding and analysis of the problem. Also, they can provide platform for improvement in the design of extended surfaces in heat transfer equipment under the influence of magnetic field.
0

274
281


Lawrence
Jayesimi
University of Lagos, Akoka, Nigeria.
Iran
ljayesimi@unilag.edu.ng


George
Oguntala
School of Electrical Engineering and Computer Science, Faculty of Engineering and Informatics, University of Bradford, UK
United Kingdom
lawrence@yahoo.com
Thermal performance
Convectiveradiative fin
Legendre wavelet Collocation method
Temperaturedependent thermal conductivity
magnetic field
[[1] A. Aziz, S. E. Huq, Perturbation solution for convecting fin with variable thermal conductivity, Journal of Heat transfer, Vol. 97, No. 2, pp. 300301, 1975.##[2] A. Aziz, Perturbation solution for convective fin with internal heat generation and temperature dependent thermal conductivity, International Journal of Heat and Mass Transfer, Vol. 20, No. 11, pp. 12531255, 1977.##[3] A. Campo, R. Spaulding, Coupling of the methods of successive approximations and undetermined coefficients for the prediction of the thermal behaviour of uniform circumferential fins, Heat and Mass Transfer, Vol. 34, No. 6, pp. 461468, 1999.##[4] C.H. Chiu, A decomposition method for solving the convective longitudinal fins with variable thermal conductivity, International Journal of Heat and Mass Transfer, Vol. 45, No. 10, pp. 20672075, 2002.##[5] C. Arslanturk, A decomposition method for fin efficiency of convective straight fins with temperaturedependent thermal conductivity, International Communications in Heat and Mass Transfer, Vol. 32, No. 6, pp. 831841, 2005.##[6] D. Ganji, The application of He's homotopy perturbation method to nonlinear equations arising in heat transfer, Physics letters A, Vol. 355, No. 45, pp. 337341, 2006.##[7] J.H. He, Homotopy perturbation technique, Computer Methods in Applied Mechanics and Engineering, Vol. 178, No. 3, pp. 257262, 1999/08/01/, 1999.##[8] M. Chowdhury, I. Hashim, Analytical solutions to heat transfer equations by homotopyperturbation method revisited, Physics Letters A, Vol. 372, No. 8, pp. 12401243, 2008.##[9] A. Rajabi, Homotopy perturbation method for fin efficiency of convective straight fins with temperaturedependent thermal conductivity, Physics Letters A, Vol. 364, No. 1, pp. 3337, 2007.##[10] M. Inc, Application of homotopy analysis method for fin efficiency of convective straight fins with temperaturedependent thermal conductivity, Mathematics and Computers in Simulation, Vol. 79, No. 2, pp. 189200, 2008.##[11] S. B. Coşkun, M. T. Atay, Analysis of convective straight and radial fins with temperaturedependent thermal conductivity using variational iteration method with comparison with respect to finite element analysis, Mathematical Problems in Engineering, Vol. 2007, 2007.##[12] E. M. Languri, D. Ganji, N. Jamshidi, Variational Iteration and Homotopy perturbation methods for fin efficiency of convective straight fins with temperature dependent thermal conductivity. 5th WSEAS Int, in Proceeding of, 27.##[13] S. B. Coşkun, M. T. Atay, Fin efficiency analysis of convective straight fins with temperature dependent thermal conductivity using variational iteration method, Applied Thermal Engineering, Vol. 28, No. 1718, pp. 23452352, 2008.##[14] M. T. Atay, S. B. Coşkun, Comparative analysis of powerlaw fintype problems using variational iteration method and finite element method, Mathematical Problems in Engineering, Vol. 2008, 2008.##[15] G. Domairry, M. Fazeli, Homotopy analysis method to determine the fin efficiency of convective straight fins with temperaturedependent thermal conductivity, Communications in Nonlinear Science and Numerical Simulation, Vol. 14, No. 2, pp. 489499, 2009.##[16] K. Hosseini, B. Daneshian, N. Amanifard, R. Ansari, Homotopy analysis method for a fin with temperature dependent internal heat generation and thermal conductivity, International Journal of Nonlinear Science, Vol. 14, No. 2, pp. 201210, 2012.##[17] A. Joneidi, D. Ganji, M. Babaelahi, Differential transformation method to determine fin efficiency of convective straight fins with temperature dependent thermal conductivity, International Communications in Heat and Mass Transfer, Vol. 36, No. 7, pp. 757762, 2009.##[18] A. Moradi, H. Ahmadikia, Analytical solution for different profiles of fin with temperaturedependent thermal conductivity, Mathematical Problems in Engineering, Vol. 2010, 2010.##[19] A. Moradi, H. Ahmadikia, Investigation of effect thermal conductivity on straight fin performance with DTM, International Journal Of Engineering & Applied Sciences, Vol. 3, No. 1, pp. 4254, 2011.##[20] S. Mosayebidorcheh, D. Ganji, M. Farzinpoor, Approximate solution of the nonlinear heat transfer equation of a fin with the powerlaw temperaturedependent thermal conductivity and heat transfer coefficient, Propulsion and Power Research, Vol. 3, No. 1, pp. 4147, 2014.##[21] S. E. Ghasemi, M. Hatami, D. Ganji, Thermal analysis of convective fin with temperaturedependent thermal conductivity and heat generation, Case Studies in Thermal Engineering, Vol. 4, pp. 18, 2014.##[22] S. Sadri, M. R. Raveshi, S. Amiri, Efficiency analysis of straight fin with variable heat transfer coefficient and thermal conductivity, Journal of Mechanical Science and Technology, Vol. 26, No. 4, pp. 12831290, 2012.##[23] D. Ganji, A. Dogonchi, Analytical investigation of convective heat transfer of a longitudinal fin with temperaturedependent thermal conductivity, heat transfer coefficient and heat generation, International Journal of Physical Sciences, Vol. 9, No. 21, pp. 466474, 2014.##[24] F. M. Fernández, On some approximate methods for nonlinear models, Applied Mathematics and Computation, Vol. 215, No. 1, pp. 168174, 2009/09/01/, 2009.##[25] A. Aziz, M. Bouaziz, A least squares method for a longitudinal fin with temperature dependent internal heat generation and thermal conductivity, Energy conversion and Management, Vol. 52, No. 89, pp. 28762882, 2011.##[26] M. Sobamowo, Thermal analysis of longitudinal fin with temperaturedependent properties and internal heat generation using Galerkin's method of weighted residual, Applied Thermal Engineering, Vol. 99, pp. 13161330, 2016.##[27] M. Sobamowo, Nonlinear thermal and flowinduced vibration analysis of fluidconveying carbon nanotube resting on Winkler and Pasternak foundations, Thermal Science and Engineering Progress, Vol. 4, pp. 133149, 2017.##[28] S. Singh, D. Kumar, K. Rai, Wavelet collocation solution for convective radiative continuously moving fin with temperaturedependent thermal conductivity, International Journal of Engineering and Advanced Technology, Vol. 2, No. 4, pp. 1016, 2013.##[29] S. Singh, D. Kumar, K. Rai, Convectiveradiative fin with temperature dependent thermal conductivity, heat transfer coefficient and wavelength dependent surface emissivity, Propulsion and Power Research, Vol. 3, No. 4, pp. 207221, 2014.##[30] S. Singh, D. Kumar, K. N Rai, Wavelet collocation solution of nonlinear Fin problem with temperature dependent thermal conductivity and heat transfer coefficient, International Journal of Nonlinear Analysis and Applications, Vol. 6, No. 1, pp. 105118, 2015.##[31] A. S. V. R. KANTH, N. U. KUMAR, A Haar Wavelet Study on ConvectiveRadiative Fin under Continuous Motion with TemperatureDependent Thermal Conductivity, Walailak Journal of Science and Technology (WJST), Vol. 11, No. 3, pp. 211224, 2013.##[32] A. Ravi Kanth, N. Uday Kumar, Application of the Haar wavelet method on a continuously moving convective‐radiative fin with variable thermal conductivity, Heat Transfer—Asian Research, Vol. 42, No. 4, pp. 335351, 2013.##[33] H. Hoshyar, D. Ganji, A. Majidian, Least square method for porous fin in the presence of uniform magnetic field, Journal of applied fluid mechanics, Vol. 9, No. 2, pp. 661668, 2016. ##]
1

Behavioral Optimization of PseudoNeutral Hole in Hyperelastic Membranes Using Functionally graded Cables
https://jcamech.ut.ac.ir/article_68773.html
10.22059/jcamech.2018.268899.338
1
Structures consisting of cables and membranes have been of interest to engineers due to their higher ratio of strength to weight and lower cost compared to other structures. One of the challenges in such structures is presence of holes in membranes, which leads to nonuniform stress and strain distributions, even under uniform farfield deformations. One of the approaches suggested for controlling this nonuniformity is reinforcing the hole edge using a cable, such that stretch changes near the hole are minimized compared to that of the far field in the membrane. In this study, considering an optimization problem, it is illustrated that for different geometries and stretch ratios in a biaxial loading of the membrane, a suitable cable of varying stiffness can be chosen such that stretch nonuniformity in the membrane is minimum, thus presenting a state of a pseudoneutral hole in the membrane. The presented form of parametric functionally graded cable and the optimization problem solved for a couple of hole shapes show that the cable can induce a state of close to uniform stretch distribution for certain values of far field stretch ratios, it also proves effective for a range of such a ratio. Relative nonuniformity indices as low as 2 percent are achieved from optimization.
0

282
291


Aliasghar
Ataee
Department of Mechanical Engineering, University of Tehran, Tehran, Iran
Iran
aataee@ut.ac.ir


Reza
Noroozi
Department of Mechanical Engineering, University of Tehran, Tehran, Iran
Iran
noroozireza99@yahoo.com
Hyperelastic Membrane
Neutral Hole
Optimization
genetic algorithm
Functional Graded Cable
[[1] J. E. Mark, B. Erman, M. Roland, 2013, The science and technology of rubber, Academic press,##[2] B. H. Topping, P. Iványi, 2008, Computer aided design of cable membrane structures, SaxeCoburg Publications,##[3] S. L. Evans, On the implementation of a wrinkling, hyperelastic membrane model for skin and other materials, Computer methods in biomechanics and biomedical engineering, Vol. 12, No. 3, pp. 319332, 2009.##[4] W.K. Choi, S.H. Kim, S.G. Choi, E.S. Lee, Quadrilateral MicroHole Array Machining on Invar Thin Film: Wet Etching and Electrochemical Fusion Machining, Materials, Vol. 11, No. 1, pp. 160, 2018.##[5] L. Gründig, E. Moncrieff, P. Singer, D. Ströbel, Highperformance cutting pattern generation of architectural textile structures, in Proceeding of.##[6] D. Gunwant, J. Singh, Stress and displacement analysis of a rectangular plate with central elliptical hole, Int J Eng Innov Technol, Vol. 3, No. 3, pp. 387392, 2013.##[7] D. Tish, W. McGee, T. Schork, G. Thün, K. Velikov, Case Studies in Topological Design and Optimization of Additively Manufactured Cablenets, in Proceeding of, Elsevier, pp.##[8] N. Younis, Assembly stress for the reduction of stress concentration, Mechanics research communications, Vol. 33, No. 6, pp. 837845, 2006.##[9] S. Ghuku, K. N. Saha, An experimental study on stress concentration around a hole under combined bending and stretching stress field, Procedia Technology, Vol. 23, pp. 2027, 2016.##[10] B. Budiansky, J. Hutchinson, A. Evans, On neutral holes in tailored, layered sheets, Journal of applied mechanics, Vol. 60, No. 4, pp. 10561058, 1993.##[11] R. MEMORANDA, Neutral Holes in Plane Sheet: Reinforced Holes which are Elastically Equivalent to the Uncut Sheet.##[12] D. Budney, D. Bellow, On the analysis of neutral holes, Experimental Mechanics, Vol. 22, No. 9, pp. 348353, 1982.##[13] E. H. Mansfield, C. J. Hanson, 1973, Optimum reinforcement around a circular hole in a flat sheet under uniaxial tension, HM Stationery Office,##[14] A. A. Atai, 1999, Finite deformation of elastic curves and surfaces,##[15] E. Haseganu, D. Steigmann, Analysis of partly wrinkled membranes by the method of dynamic relaxation, Computational Mechanics, Vol. 14, No. 6, pp. 596614, 1994.##[16] A. Atai, D. Steigmann, Coupled deformations of elastic curves and surfaces, International Journal of Solids and Structures, Vol. 35, No. 16, pp. 19151952, 1998.##[17] A. C. Pipkin, The relaxed energy density for isotropic elastic membranes, IMA journal of applied mathematics, Vol. 36, No. 1, pp. 8599, 1986.##[18] S. P. Timoshenko, J. M. Gere, Théorie de la stabilité élastique, Paris: Dunod, c1966, 2eme ed., 1966. ##]
1

Prediction and optimization of load and torque in ring rolling process through development of artificial neural network and evolutionary algorithms
https://jcamech.ut.ac.ir/article_65485.html
10.22059/jcamech.2018.246800.215
1
Developing artificial neural network (ANN), a model to make a correct prediction of required force and torque in ring rolling process is developed for the first time. Moreover, an optimal state of process for specific range of input parameters is obtained using Genetic Algorithm (GA) and Particle Swarm Optimization (PSO) methods. Radii of main roll and mandrel, rotational speed of main roll, pressing velocity of mandrel and blank size are considered as input parameters. Furthermore, the required load and torque in ring rolling process are taken into account as process outputs. Various three dimensional finite element simulations are performed for different sets of process variables to achieve preliminary data for training and validation of the neural network. Besides, the finite element model is approved via comparison with the experimental results of the other investigators. The Back Propagation (BP) algorithm is considered to develop Levenberg–Marquardt feedforward network. Additionally, Model responses analysis is carried out to improve the understanding of the behavior of the ANN model. It is concluded that results of ANN predictions have an appropriate conformity with those from simulation and experiments. Moreover, GA and PSO methods have been implemented to obtain the optimal state of process while their outcomes have been also compared.
0

292
303


Hamid Reza
Rohani Raftar
Department of Mechanical and Aerospace Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
Iran
hr.rohani@yahoo.com


Ali
Parvizi
School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Iran
aliparvizi@ut.ac.ir
Artificial Neural Network
FEM
Genetic
Optimization
Ring rolling
[[1] J. S. Ryoo, D. Y. Yang, W. Johnson, The influence of process parameters on torque and load in ring rolling, Journal of Mechanical Working Technology, Vol. 12, No. 3, pp. 307321, 1986.##[2] A. Parvizi, K. Abrinia, A two dimensional Upper Bound Analysis of the ring rolling process with experimental and FEM verifications, International Journal of Mechanical Sciences, Vol. 79, pp. 176181, 2014.##[3] D. Y. Yang, J. S. Ryoo, An investigation into the relationship between torque and load in ring rolling, Journal of Engineering for Industry, Vol. 109, No. 3, pp. 190196, 1987.##[4] G. Zhou, L. Hua, D. S. Qian, 3D coupled thermomechanical FE analysis of roll size effects on the radial–axial ring rolling process, Computational Materials Science, Vol. 50, No. 3, pp. 911924, 2011.##[5] L. Fausett, Fundamentals of neural networks: architectures, algorithms, and applications, PrenticeHall, Inc. , 1994.##[6] H. Altınkaya, I. E. I. M. Orak, Artificial neural network application for modeling the rail rolling process, Expert Systems with Applications, Vol. 41, No. 16, pp. 71357146, 2014.##[7] M. Sharififar, S. A. A. A. Mousavi, Numerical study and genetic algorithm optimization of hot extrusion process to produce rectangular waveguides, Journal of Computational Applied Mechanics, Vol. 47, No. 2, pp. 129136, 2016.##[8] M. Moghaddam, F. Kolahan, An empirical study on statistical analysis and optimization of EDM process parameters for inconel 718 super alloy using Doptimal approach and genetic algorithm, Journal of Computational Applied Mechanics, Vol. 46, No. 2, pp. 267277, 2015.##[9] S. Jalilirad, M. H. Cheraghali, H. A. D. Ashtiani, Optimal Design of ShellandTube Heat Exchanger Based on Particle Swarm Optimization Technique, Journal of Computational Applied Mechanics, Vol. 46, No. 1, pp. 2129, 2014.##[10] D. Y. Yang, J. S. Ryoo, J. C. Choi, W. Johnson, Analysis of roll torque in profile ring rolling of Lsections, In: Proceedings 18th MTDR conference, London, pp. 6974, 1980.##[11] G. I. Li, S. Kobayashi, Rigidplastic finiteelement analysis of plane strain rolling, Journal of Engineering for Industry, Vol. 104, No. 1, pp. 5564, 1982.##[12] C. C. Chen, S. Kobayashi, Rigidplastic finite element analysis of ring compression, Applications of Numerical Methods to Forming Processes, Vol. 28, pp. 163174, 1978.##[13] G. R. Johnson, W. H. Cook, A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures, In Proceedings of the 7th International Symposium on Ballistic, 1983.##[14] S. P. F. C. Jaspers, H. Dautzenberg, Material behaviour in conditions similar to metal cutting: flow stress in the primary shear zone, Journal of Materials Processing Technology, Vol. 122, No. 2, pp. 322330, 2002.##[15] J. Deng, X. L. D. Gu, Z. Q. Yue, Structural reliability analysis for implicit performance functions using artificial neural network, Structural Safety, Vol. 27, No. 1, pp. 2548, 2005.##[16] R. Kazan, M. Firat, A. E. Tiryaki, Prediction of springback in wipebending process of sheet metal using neural network, Materials & Design, Vol. 30, No. 2, pp. 418423, 2009.##[17] B. Widrow, M. A. Lher, 30 years of adaptive neural networks: perceptron, madeline and backpropagation, Proceedings of the IEEE, 1990. ##]
1

Longitudinal Magnetic Field Effect on Torsional Vibration of Carbon Nanotubes
https://jcamech.ut.ac.ir/article_68656.html
10.22059/jcamech.2018.269982.344
1
Torsional dynamic analysis of carbon nanotubes under the effect of longitudinal magnetic field is carried out in the present study. Torque effect of an axial magnetic field on a carbon nanotube has been defined using Maxwell’s relation. Nonlocal governing equation and boundary conditions for carbon nanotubes are obtained by using Hamilton’s minimum energy principle. Eringen’s nonlocal stress gradient elasticity theory is used in the formulation. Fourth order nonlocal equation of motion is solved by utilizing differential quadrature method. Clampedclamped and clampedfree nonlocal boundary conditions are considered. Nonlocal and axial magnetic field effects on torsional vibration of carbon nanotubes are investigated. The magnetic field has significant effects on the dynamics of carbon nanotubes and may lead to torsional buckling. Critical torsional buckling load reduces with nonlocal effects. Nonlocality shows softening effect on carbon nanotube’s lattice structure. Present results can be used in the design and analysis of nanoelectromechanical products like nanomotors.
0

304
313


Mustafa
Arda
Department of Mechanical Engineering, Trakya University, Edirne, Turkey
Turkey
mustafaarda@trakya.edu.tr


Metin
Aydogdu
Department of Mechanical Engineering, Trakya University, Edirne, Turkey
Turkey
metina@trakya.edu.tr
Carbon nanotubes
torsional vibration
nonlocal elasticity
longitudinal magnetic field
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V., Chiu H.Y., Postma H.W.C., Mikó C., Forró L., Bockrath M., Carbon nanotube linear bearing nanoswitches., Nano Letters, 6, 1092–5, 2006.##[5] Bourlon B., Glattli D.C., Miko C., Forró L., Bachtold A., Carbon Nanotube Based Bearing for Rotational Motions, Nano Letters, 4, 709–12, 2004.##[6] Ilic B., Yang Y., Craighead H.G., Virus detection using nanoelectromechanical devices, Applied Physics Letters, 85, 2604, 2004.##[7] Eringen A.C., Nonlocal polar elastic continua, International Journal of Engineering Science, 10, 1–16, 1972.##[8] Eringen A.C., On differential equations of nonlocal elasticity ##and solutions of screw dislocation and surface waves, Journal of Applied Physics, 54, 4703–10, 1983.## [9] Ajiki H., Ando T., Energy Bands of Carbon Nanotubes in Magnetic Fields, Journal of the Physical Society of Japan, 65, 505–14, 1996.##[10] Bellucci S., González J., Guinea F., Onorato P., Perfetto E., Magnetic field effects in carbon nanotubes, Journal of Physics: Condensed Matter, 19, 395017, 2007.##[11] Fedorov G., Tselev A., Jimenez D., Latil S., Kalugin N.G., Barbara P., et al., Magnetically Induced Field Effect in Carbon Nanotube Devices, Nano Letters, 7, 960–4, 2007.##[12] Lee D.W., Kim S.H., Kozlov M.E., Lepró X., Baughman R.H., Kim S.J., Magnetic torsional actuation of carbon nanotube yarn artificial muscle, RSC Advances, 8, 17421–5, 2018.##[13] Wang H., Dong K., Men F., Yan Y.J., Wang X., Influences of longitudinal magnetic field on wave propagation in carbon nanotubes embedded in elastic matrix, Applied Mathematical Modelling, 34, 878–89, 2010.##[14] Li S., Xie H.J., Wang X., Dynamic characteristics of multiwalled carbon nanotubes under a transverse magnetic field, Bulletin of Materials Science, 34, 45–52, 2011.##[15] Li H., Wang X., Transient response of carbon nanotubes with inhomogeneous coating under radial impact loading and magnetic field, Journal of Reinforced Plastics and Composites, 32, 410–9, 2012.##[16] Murmu T., McCarthy M. a., Adhikari S., Nonlocal elasticity based magnetic field affected vibration response of double singlewalled carbon nanotube systems, Journal of Applied Physics, 111, 113511, 2012.##[17] Murmu T., McCarthy M. a., Adhikari S., Vibration response of doublewalled carbon nanotubes subjected to an externally applied longitudinal magnetic field: A nonlocal elasticity approach, Journal of Sound and Vibration, 331, 5069–86, 2012.##[18] Murmu T., Adhikari S., McCarthy M. a., Axial Vibration of Embedded Nanorods Under Transverse Magnetic Field Effects via Nonlocal Elastic Continuum Theory, Journal of Computational and Theoretical Nanoscience, 11, 1230–6, 2014.##[19] Narendar S., Gupta S.S., Gopalakrishnan S., Wave propagation in singlewalled carbon nanotube under longitudinal magnetic field using nonlocal Euler–Bernoulli beam theory, Applied Mathematical Modelling, 36, 4529–38, 2012.##[20] Wang X., Shen J.X., Liu Y., Shen G.G., Lu G., Rigorous van der Waals effect on vibration characteristics of multiwalled carbon nanotubes under a transverse magnetic field, Applied Mathematical Modelling, 36, 648–56, 2012.##[21] Ghorbanpour Arani A., Jalilvand A., Kolahchi R., Wave propagation of magnetic nanofluidconveying doublewalled carbon nanotubes in the presence of longitudinal magnetic field, Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanoengineering and Nanosystems, 228, 82–92, 2014.##[22] Ghorbanpour Arani A., Amir S., Karamali Ravandia A., Nonlinear FlowInduced Flutter In##stability of Double CNTs Using Reddy Beam Theory, Journal of Applied Mechanics, 46, 1–12, 2015##[23] Li Y., Ma P., Wang W., Bending, buckling, and free vibration of magnetoelectroelastic nanobeam based on nonlocal theory, Journal of Intelligent Material Systems and Structures, 27, 1139–49, 2016.##[24] Wang B., Deng Z., Ouyang H., Wang Y., Terahertz wave propagation in a fluidconveying singlewalled carbon nanotube with initial stress subjected to temperature and magnetic fields, Acta Mechanica, 226, 3031–43, 2015.##[25] Chang T.P., Nonlinear Vibration of SingleWalled Carbon Nanotubes Under Magnetic Field by Stochastic Finite Element Method, International Journal of Structural Stability and Dynamics, 16, 1550046, 2016.##[26] Kiani K., Characterization of free vibration of elastically supported doublewalled carbon nanotubes subjected to a longitudinally varying magnetic field, Acta Mechanica, 224, 3139–51, 2013. doi:10.1007/s0070701309378##[27] Kiani K., Longitudinally varying magnetic field influenced transverse vibration of embedded doublewalled carbon nanotubes, International Journal of Mechanical Sciences, 87, 179–99, 2014. doi:10.1016/j.ijmecsci.2014.04.018##[28] Kiani K., Vibration and instability of a singlewalled carbon nanotube in a threedimensional magnetic field, Journal of Physics and Chemistry of Solids, 75, 15–22, 2014.##[29] Kiani K., Free vibration of inplanealigned membranes of singlewalled carbon nanotubes in the presence of inplaneunidirectional magnetic fields, Journal of Vibration and Control, 22, 3736–66, 2016.##[30] Kiani K., Axial buckling analysis of a slender currentcarrying nanowire acted upon by a magnetic field using the surface energy approach, Journal of Physics D: Applied Physics, 48, 245302, 2015.##[31] Kiani K., Column buckling of magnetically affected stocky nanowires carrying electric current, Journal of Physics and Chemistry of Solids, 83, 140–51, 2015.##[32] Kiani K., Vibrations and instability of pretensioned currentcarrying nanowires acted upon by a suddenly applied threedimensional magnetic field, Materials Chemistry and Physics, 162, 531–41, 2015.##[33] Daneshmehr A., Rajabpoor A., Hadi A., Size dependent free vibration analysis of nanoplates made of functionally graded materials based on nonlocal elasticity theory with high order theories, International Journal of Engineering Science, 95, 23–35, 2015.##[34] Nejad M.Z., Hadi A., Nonlocal analysis of free vibration of bidirectional functionally graded EulerBernoulli nano beams, International Journal of Engineering Science, 105, 1–11, 2016.##[35] Nejad M.Z., Hadi A., Eringen’s nonlocal elasticity theory for bending analysis of bidirectional functionally graded Euler–Bernoulli nanobeams, International Journal of Engineering Science, 106, 1–9, 2016.##[36] Hosseini M., Shishesaz M., Tahan K.N., Hadi A., Stress analysis of rotating nanodisks of variable thickness made of functionally graded materials, International Journal of Engineering Science, 109, 1339–51, 2016.##[37] Shishesaz M., Hosseini M., Naderan Tahan K., Hadi A., Analysis of functionally graded nanodisks under thermoelastic loading based on the strain gradient theory, Acta Mechanica, 228, 4141–68, 2017.##[38] Hadi A., Nejad M.Z., Hosseini M., Vibrations of threedimensionally graded nanobeams, International Journal of Engineering Science, 128, 12–23, 2018.##[39] Haghshenas Gorgani H., Mahdavi Adeli M., Hosseini M., Pullin behavior of functionally graded micro/nanobeams for MEMS and NEMS switches, Microsystem Technologies, 4, 2018.##[40] Hosseini M., Gorgani H.H., Shishesaz M., Hadi A., Sizedependent stress analysis of singlewall carbon nanotube based on strain gradient theory, International Journal of Applied Mechanics, 9, 2017.##[41] Hosseini M., Hadi A., Malekshahi A., A review of sizedependent elasticity for nanostructures, 49, 197–211, 2018.##[42] Farajpour M.R., Shahidi A.R., Hadi A., Farajpour A., Influence of initial edge displacement on the nonlinear vibration, electrical and magnetic instabilities of magnetoelectroelastic nanofilms, Mechanics of Advanced Materials and Structures, 0, 1–13, 2018.##[43] Hadi A., Rastgoo A., Haghighipour N., Bolhassani A., Numerical modelling of a spheroid living cell membrane under hydrostatic pressure, Journal of Statistical Mechanics: Theory and Experiment, 2018, 083501, 2018.##[44] Morozov K.I., Leshansky A.M., The chiral magnetic nanomotors, Nanoscale, 6, 1580–8, 2014.##[45] Mandal P., Chopra V., Ghosh A., Independent Positioning of Magnetic Nanomotors, ACS Nano, 9, 4717–25, 2015.##[46] Li J., Li T., Xu T., Kiristi M., Liu W., Wu Z., et al., MagnetoAcoustic Hybrid Nanomotor, Nano Letters, 15, 4814–21, 2015.##[47] Pal M., Somalwar N., Singh A., Bhat R., Eswarappa S.M., Saini D.K., et al., Maneuverability of Magnetic Nanomotors Inside Living Cells, Advanced Materials, 30, 1–7, 2018. doi:10.1002/adma.201800429##[48] Kraus J.D., Electromagnetics. 3rd ed. McGrawHill Inc.,US, 3rd1984##[49] Eringen A.C., Nonlocal Continuum Field Theories. Springer New York, 2007##[50] Lu P., Lee H.P., Lu C., Zhang P.Q., Application of nonlocal beam models for carbon nanotubes, International Journal of Solids and Structures, 44, 5289–300, 2007.##[51] Adali S., Variational principles for multiwalled carbon nanotubes undergoing nonlinear vibrations by semiinverse method, Micro & Nano Letters, 4, 198–203, 2009.##[52] Adali S., Variational Principles for Transversely Vibrating Multiwalled Carbon Nanotubes Based on Nonlocal Euler−Bernoulli Beam Model, Nano Letters, 9, 1737–41, 2009.##[53] Bellman R., Casti J., Differential quadrature and longterm integration, Journal of Mathematical Analysis and Applications, 34, 235–8, 1971.##[54] Bert C.W., Malik M., Differential Quadrature Method in Computational Mechanics: A Review, Applied Mechanics Reviews, 49, 1, 1996.##[55] Murmu T., Pradhan S.C., Buckling analysis of a singlewalled carbon nanotube embedded in an elastic medium based on nonlocal elasticity and Timoshenko beam theory and using DQM, Physica E: LowDimensional Systems and Nanostructures, 41, 1232–9, 2009.##[56] Pradhan S.C., Murmu T., Application of nonlocal elasticity and DQM in the flapwise bending vibration of a rotating nanocantilever, Physica E: LowDimensional Systems and Nanostructures, 42, 1944–9, 2010.##[57] Wang L., Sizedependent vibration characteristics of fluidconveying microtubes, Journal of Fluids and Structures, 26, 675–84, 2010.##[58] Narendar S., Differential quadrature based nonlocal flapwise bending vibration analysis of rotating nanotube with consideration of transverse shear deformation and rotary inertia, Applied Mathematics and Computation, 219, 1232–43, 2012.##[59] Ansari R., Sahmani S., Small scale effect on vibrational response of singlewalled carbon nanotubes with different boundary conditions based on nonlocal beam models, Communications in Nonlinear Science and Numerical Simulation, 17, 1965–79, 2012.##[60] Rahmati A.H., Mohammadimehr M., Vibration analysis of nonuniform and nonhomogeneous boron nitride nanorods embedded in an elastic medium under combined loadings using DQM, Physica B: Condensed Matter, 440, 88–98, 2014.##[61] Aydogdu M., Arda M., Forced vibration of nanorods using nonlocal elasticity, Advances in Nano Research, 4, 265–79, 2016.##[62] Shu C., Differential Quadrature and Its Application in Engineering. Springer London, 2000. doi:10.1007/9781447104070[63] Laurent C., Flahaut E., Peigney A., The weight and density of carbon nanotubes versus the number of walls and diameter, Carbon, 48, 2994–6, 2010.##[64] Li C., Chou T.W., A structural mechanics approach for the analysis of carbon nanotubes, International Journal of Solids and Structures, 40, 2487–99, 2003.##[65] Arda M., Aydogdu M., Torsional wave propagation in multiwalled carbon nanotubes using nonlocal elasticity, Applied Physics A, 122, 219, 2016.##[66] Aydogdu M., Arda M., Torsional vibration analysis of double walled carbon nanotubes using nonlocal elasticity, International Journal of Mechanics and Materials in Design, 12, 71–84, 2016.##]
1

Thermal simulation of twophase flow in underbalanced drilling operation with oil and gas production
https://jcamech.ut.ac.ir/article_65810.html
10.22059/jcamech.2018.255751.261
1
The accurate prediction of wellbore temperature distribution helps to accurately estimate well pressure profile and bottomhole pressure (BHP) which is important in the underbalanced drilling (UBD) operation. In this paper effect of temperature variation due to heat transfer of drilling fluid with the formation and also oil and gas production from the reservoir into the annulus in underbalanced drilling condition were investigated. Gasliquid twophase flow model considering thermal interaction with the formation is used to numerically simulate a well with real dimensions. Based on drilling fluids flow and heat transfer characteristics in wells, conservations of mass and momentum and energy equations have been developed to compute BHP and wellbore temperature and pressure profile. After temperature and pressure validation of the numerical model, the effect of heat transfer between drilling fluid inside the well and the formation was considered on the pressure distribution and bottomhole pressure. The results of twophase flow, considering thermal effect gives better results compared to twophase flow with geothermal temperature distribution analysis and better accuracy in comparison with other models.
0

314
322


Ebrahim
Hajidavalloo
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
hajidavallooebrahim@gmail.com


Ali
Falavand Jozaei
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
falavand78@yahoo.com


Aziz
Azimi
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
a.azimi@scu.ac.ir


Younes
Shekari
Department of Mechanical Engineering, Yasouj University, Yasouj, Iran
Iran
shekari@yu.ac.ir


Saeed
Ghobadpouri
Department of Mechanical Engineering, Yasouj University, Yasouj, Iran
Iran
sghy_790@yahoo.com
UnderBalanced Drilling (UBD)
BottomHole Pressure (BHP)
Pressure distribution
Twofluid model
Temperature profile
[[1] C. S. Holmes, S. C. Swift, Calculation of Circulating Mud Temperatures, 1970/6/1/, 1970.##[2] H. J. Ramey, Jr., Wellbore Heat Transmission, 1962/4/1/, 1962.##[3] L. R. Raymond, Temperature Distribution in a Circulating Drilling Fluid, 1969/3/1/, 1969.##[4] F. C. Arnold, Temperature Variation in a Circulating Wellbore Fluid, Journal of Energy Resources Technology, Vol. 112, No. 2, pp. 7983, 1990.##[5] G. R. Wooley, Computing Downhole Temperatures in Circulation, Injection, and Production Wells, 1980/9/1/, 1980.##[6] A. Garcia, I. Hernandez, G. Espinosa, E. Santoyo, TEMLOPI: a thermal simulator for estimation of drilling mud and formation temperatures during drilling of geothermal wells, Computers & Geosciences, Vol. 24, No. 5, pp. 465477, 1998/06/15/, 1998.##[7] A. R. Hasan, C. S. Kabir, Twophase flow in vertical and inclined annuli, International Journal of Multiphase Flow, Vol. 18, No. 2, pp. 279293, 1992/03/01/, 1992.##[8] J. Fan, C. Gao, S. Taihe, H. Liu, Z. Yu, A Comprehensive Model and Computer Simulation for Underbalanced Drilling in Oil and Gas Wells, in SPE/ICoTA Coiled Tubing Roundtable, Houston, Texas, 2001.##[9] B. Guo, A. Ghalambor, An Innovation in Designing Underbalanced Drilling Flow Rates: A GasLiquid Rate Window (GLRW) Approach, in IADC/SPE Asia Pacific Drilling Technology, Jakarta, Indonesia, 2002.##[10] C. PerezTellez, Improved bottomhole pressure control for underbalanced drilling operations, 2003.##[11] C. PerezTellez, J. R. Smith, J. K. Edwards, A New Comprehensive, Mechanistic Model for Underbalanced Drilling Improves Wellbore Pressure Predictions, in SPE International Petroleum Conference and Exhibition in Mexico, Villahermosa, Mexico, 2002.##[12] L.q. PING, Z.m. WANG, J.g. WEI, Pressure drop models for gasliquid twophase flow and its application in underbalanced drilling, Journal of Hydrodynamics, Ser. B, Vol. 18, No. 3, pp. 405411, 2006.##[13] E. Apak, E. Ozbayoglu, Heat distribution within the wellbore while drilling, Petroleum Science and Technology, Vol. 27, No. 7, pp. 678686, 2009.##[14] S. Ghobadpouri, Hajidavalloo, E., Noghrehabadi, A., Shekari, Y., Khezrian, Numerical simulation of underbalanced drilling operations with oil and gas production from reservoir using single pressure twofluid model, Modares Mechanical Engineering, Vol. 16, No. 6, pp. 291302, 2016 (in Persian)##[15] X. Song, Z. Guan, Coupled modeling circulating temperature and pressure of gas–liquid two phase flow in deep water wells, Journal of Petroleum Science and Engineering, Vol. 9293, pp. 124131, 2012/08/01/, 2012.##[16] S. Evje, T. Flåtten, Hybrid fluxsplitting schemes for a common twofluid model, Journal of Computational Physics, Vol. 192, No. 1, pp. 175210, 2003.##[17] M. Ishii, K. Mishima, Twofluid model and hydrodynamic constitutive relations, Nuclear Engineering and design, Vol. 82, No. 23, pp. 107126, 1984.##[18] N. Hatta, H. Fujimoto, M. Isobe, J.S. Kang, Theoretical analysis of flow characteristics of multiphase mixtures in a vertical pipe, International Journal of Multiphase Flow, Vol. 24, No. 4, pp. 539561, 1998.##[19] D. Drew, L. Cheng, R. Lahey Jr, The analysis of virtual mass effects in twophase flow, International Journal of Multiphase Flow, Vol. 5, No. 4, pp. 233242, 1979.##[20] D. Bestion, The physical closure laws in the CATHARE code, Nuclear Engineering and design, Vol. 124, No. 3, pp. 229245, 1990.##[21] P. Dranchuk, H. AbouKassem, Calculation of Z factors for natural gases using equations of state, Journal of Canadian Petroleum Technology, Vol. 14, No. 03, 1975.##[22] O. O. Harris, Evaluation of equivalent circulating density of drilling fluids under high pressurehigh temperature conditions, Thesis, University of Oklahoma, 2004.##[23] D. Kim, Improved convective heat transfer correlations for twophase twocomponent pipe flow, KSME international Journal, Vol. 16, No. 3, pp. 403422, 2002.##[24] M. Li, G. Liu, J. Li, T. Zhang, M. He, Thermal performance analysis of drilling horizontal wells in high temperature formations, Applied Thermal Engineering, Vol. 78, pp. 217227, 2015.##[25] D. Gao, Downhole tubular mechanics and its applications, China University of Petroleum Press, Dongying, China, pp. 8087, 2006.##[26] O. Bratland, Pipe flow 2: multiphase flow assurance, Ove Bratland Flow Assurance Consulting, Chonburi, Thailand, 2010.##]
1

Evaluation of Thermomechanical stress in work rolls of ring rolling mill under thermal and mechanical loading
https://jcamech.ut.ac.ir/article_65484.html
10.22059/jcamech.2018.249708.230
1
The defect in work rolls directly influence the forming cost and the final shape of the product. The researchers tend to investigate the thermomechanical stress in work roll of rolling machines. These stresses may reduce the roll life. Since the investigation of the thermomechanical stress in work roll with realconditions is complex, comprehensive studies by means of numerical methods are available in numerous literature. However, simulating the thermomechanical stress is timeconsuming. So, most researchers desire to simplify the geometry and boundary conditions in order to reduce simulation cost. This paper proposes an integrated finite element model to study the thermomechanical behavior of work rolls during hot ring rolling process. Various methods were simulated and advantages and disadvantages of each method were discussed. Due to complexities of ring rolling process, the presented model was used in flat rolling in order to verify model integrity. After that work rolls of ring rolling mill subjected to partial boundary conditions are investigated. The results of thermal and thermomechanical simulations show stresses in the contact region of work rolls are rather different. However, they expressed the same results in other regions. Based on the obtained results, it is revealed that the effect of mechanical loads in the equivalent stresses should be considered and the location of equivalent maximum stress is below the surface.
0

323
334


Ali
Negahban
Mechanical and Aerospace Engineering Department, MalekAshtar University of Technology, Shahinshahr, Esfahan, Iran
Iran
ali.negahban@mutes.ac.ir


Ehsan
Barati
MalekAshtar University of Technology, university complex of mechanical and aerospace engineering Shahinshahr, Esfahan, Iran
Iran
e_barati@mutes.ac.ir


Abdolali
Maracy
MalekAshtar University of Technology, university complex of mechanical and aerospace engineering Shahinshahr, Esfahan, Iran
Iran
a_maracy@mutes.ac.ir
Ring rolling
ThermoMechanical Stress
effective thermal layer
Script Code
ABAQUS
[[1] T. M.W. Dortmund, Precision forgings produced on axial closed die rolling lines, FIA's Forge Fair, Vol. 88, 1988.##[2] J. Hawkyard, W. Johnson, J. Kirkland, E. Appleton, Analyses for roll force and torque in ring rolling, with some supporting experiments, International Journal of Mechanical Sciences, Vol. 15, No. 11, pp. 873893, 1973.##[3] A. Mamalis, W. Johnson, J. Hawkyard, Pressure distribution, roll force and torque in cold ring rolling, Journal of Mechanical Engineering Science, Vol. 18, No. 4, pp. 196209, 1976.##[4] D. Yang, J. Ryoo, J. Choi, W. Johnson, Analysis of roll torque in profile ringrolling of Lsections, in Proceeding of, Springer, pp. 6974.##[5] J. Ryoo, D. Yang, W. Johnson, Lower upperbound analysis of the ring rolling process by using force polygon diagram and dual velocity field, Advanced Technology Plasticity, Vol. 2, pp. 12921298, 1984.##[6] P. Stevens, K. Ivens, P. Harper, Increasing workroll life by improved rollcooling practice, J Iron Steel Inst, Vol. 209, No. 1, pp. 111, 1971.##[7] A. Tseng, S. Tong, F. Lin, Thermal stresses of rotating rolls in rolling processing, Journal of Thermal Stresses, Vol. 12, No. 4, pp. 427450, 1989.##[8] E. Patula, Steadystate temperature distribution in a rotating roll subject to surface heat fluxes and convective cooling, ASME Journal of heat transfer, Vol. 103, No. 1, pp. 3641, 1981.##[9] W. Yuen, On the steadystate temperature distribution in a rotating cylinder subject to heating and cooling over its surface, ASME Journal of Heat Transfer, Vol. 106, No. 3, pp. 578585, 1984.##[10] A. C. Yiannopoulos, N. Anifantis, A. Dimarogonas, Thermal stress optimization in metal rolling, Journal of thermal stresses, Vol. 20, No. 6, pp. 569590, 1997.##[11] A. Afshin, M. Zamani Nejad, K. Dastani, Transient thermoelastic analysis of FGM rotating thick cylindrical pressure vessels under arbitrary boundary and initial conditions, Journal of Computational Applied Mechanics, Vol. 48, No. 1, pp. 1526, 2017.##[12] M. Gharibi, M. Z. Nejad, A. Hadi, Elastic analysis of functionally graded rotating thick cylindrical pressure vessels with exponentiallyvarying properties using power series method of Frobenius, Journal of Computational Applied Mechanics, Vol. 48, No. 1, pp. 8998, 2017.##[13] N. Razani, B. M. Dariani, M. Soltanpour, Analytical approach of asymmetrical thermomechanical rolling by slab method, The International Journal of Advanced Manufacturing Technology, Vol. 94, No. 14, pp. 175189, 2018.##[14] O. Zienkiewicz, E. Oñae, J. Heinrich, A general formulation for coupled thermal flow of metals using finite elements, International Journal for Numerical Methods in Engineering, Vol. 17, No. 10, pp. 14971514, 1981.##[15] A. Tseng, A numerical heat transfer analysis of strip rolling, Journal of heat transfer, Vol. 106, No. 3, pp. 512517, 1984.##[16] P. Gratacos, P. Montmitonnet, C. Fromholz, J. Chenot, A planestrain elastoplastic finiteelement model for cold rolling of thin strip, International journal of mechanical sciences, Vol. 34, No. 3, pp. 195210, 1992.##[17] W. Lai, T. Chen, C. Weng, Transient thermal stresses of work roll by coupled thermoelasticity, Computational mechanics, Vol. 9, No. 1, pp. 5571, 1991.##[18] D.F. Chang, Thermal stresses in work rolls during the rolling of metal strip, Journal of materials processing technology, Vol. 94, No. 1, pp. 4551, 1999.##[19] P.T. Hsu, Y.T. Yang, A threedimensional inverse problem of estimating the surface thermal behavior of the working roll in rolling process, Journal of manufacturing science and engineering, Vol. 122, No. 1, pp. 7682, 2000.##[20] S. Serajzadeh, A. K. Taheri, F. Mucciardi, Unsteady state workroll temperature distribution during continuous hot slab rolling, International Journal of Mechanical Sciences, Vol. 44, No. 12, pp. 24472462, 2002.##[21] F. Fischer, W. Schreiner, E. Werner, C. Sun, The temperature and stress fields developing in rolls during hot rolling, Journal of materials processing technology, Vol. 150, No. 3, pp. 263269, 2004.##[22] J. Song, A. Dowson, M. Jacobs, J. Brooks, I. Beden, Coupled thermomechanical finiteelement modelling of hot ring rolling process, Journal of Materials Processing Technology, Vol. 121, No. 2, pp. 332340, 2002.##[23] D. Benasciutti, E. Brusa, G. Bazzaro, Finite elements prediction of thermal stresses in work roll of hot rolling mills, Procedia Engineering, Vol. 2, No. 1, pp. 707716, 2010.##[24] D. Benasciutti, On thermal stress and fatigue life evaluation in work rolls of hot rolling mill, The Journal of Strain Analysis for Engineering Design, Vol. 47, No. 5, pp. 297312, 2012.##[25] A. Draganis, F. Larsson, A. Ekberg, Finite element analysis of transient thermomechanical rolling contact using an efficient arbitrary Lagrangian–Eulerian description, Computational Mechanics, Vol. 54, No. 2, pp. 389405, 2014.##[26] H. Sayadi, S. Serajzadeh, Prediction of thermal responses in continuous hot strip rolling processes, Production Engineering, Vol. 9, No. 1, pp. 7986, 2015.##[27] F. Qayyum, M. Shah, S. Manzoor, M. Abbas, Comparison of thermomechanical stresses produced in work rolls during hot and cold rolling of Cartridge Brass 1101, Materials Science and Technology, Vol. 31, No. 3, pp. 317324, 2015.##[28] A. Milenin, R. Kuziak, M. LechGrega, A. Chochorowski, S. Witek, M. Pietrzyk, Numerical modeling and experimental identification of residual stresses in hotrolled strips, Archives of civil and mechanical engineering, Vol. 16, No. 1, pp. 125134, 2016.##[29] B. Koohbor, Finite element modeling of thermal and mechanical stresses in workrolls of warm strip rolling process, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, Vol. 230, No. 6, pp. 10761086, 2016.##[30] D. Benasciutti, F. De Bona, M. G. Munteanu, A harmonic onedimensional element for nonlinear thermomechanical analysis of axisymmetric structures under asymmetric loads: The case of hot strip rolling, The Journal of Strain Analysis for Engineering Design, Vol. 51, No. 7, pp. 518531, 2016.##[31] G. Deng, Q. Zhu, K. Tieu, H. Zhu, M. Reid, A. A. Saleh, L. Su, T. D. Ta, J. Zhang, C. Lu, Evolution of microstructure, temperature and stress in a high speed steel work roll during hot rolling: Experiment and modelling, Journal of Materials Processing Technology, Vol. 240, pp. 200208, 2017.##[32] K. H. Huebner, D. L. Dewhirst, D. E. Smith, T. G. Byrom, 2008, The finite element method for engineers, John Wiley & Sons,##[33] M. Balla, Formulation of coupled problems of thermoelasticity by finite elements, Periodica Polytechnica. Engineering. Mechanical Engineering, Vol. 33, No. 12, pp. 59, 1989.##[34] ABAQUS, ABAQUS Documentation, Dassault Systèmes, 2013.##[35] A. Negahban, A. Maracy, E. Barati, Investigation of 2D Hot Ring Rolling Simulation and Effects of Different Parameters on Forming Process of Jet’s Spool, Journal of aeronautical engineering, Vol. 18, No. 1, pp. 7592, 2016. “(in Persian)”##[36] L. Hua, X. Huang, C. Zhu, Theory and technology of ring rolling, China Mechanical Industry Press, Beijing, 2001.##[37] J. Benedyk, Aerospace And High Performance Alloys Database, UNE, Vol. 36072, No. 2.##[38] efunda. www.efunda.com, Accessed.##[39] H. Yan, G. Qian, Q. Hu, Development of flow stress of AISI H13 die steel in hard machining, Journal of Wuhan University of TechnologyMater. Sci. Ed., Vol. 22, No. 2, pp. 187190, 2007.##[40] M. Forouzan, M. Salimi, M. Gadala, Threedimensional FE analysis of ring rolling by employing thermal spokes method, International journal of mechanical sciences, Vol. 45, No. 12, pp. 19751998, 2003.##[41] A. Tseng, S. Tong, S. Maslen, J. Mills, Thermal behavior of aluminum rolling, Journal of Heat Transfer, Vol. 112, No. 2, pp. 301308, 1990.##[42] A. Tseng, F. Lin, A. Gunderia, D. Ni, Roll cooling and its relationship to roll life, Metallurgical Transactions A, Vol. 20, No. 11, pp. 2305, 1989.##[43] R. D. Cook, 1994, Finite element modeling for stress analysis, Wiley,##[44] A. Sonboli, S. Serajzadeh, A model for evaluating thermomechanical stresses within workrolls in hotstrip rolling, Journal of Engineering Mathematics, Vol. 72, No. 1, pp. 7385, 2012. ##]
1

A two dimensional Simulation of crack propagation using Adaptive Finite Element Analysis
https://jcamech.ut.ac.ir/article_68653.html
10.22059/jcamech.2018.264698.319
1
Finite element method (FEM) is one of the most famous methods which has many applications in varies studies such as the study of crack propagation in engineering structures. However, unless extremely fine meshes are employed, problem arises in accurately modelling the singular stress field in the singular element area around the crack tip. In the present study, the crack growth simulation has been numerically simulated by using the dens mesh finite element source code program using Visual FORTRAN language. This code includes the mesh generator based on the advancing front method as well as all the pre and post process for the crack growth simulation under linear elastic fracture mechanics theory. The stress state at a crack tip has been described by the stress intensity factor which is related to the rate of crack growth. The displacement extrapolation technique is employed to obtain crack tip singular stresses and the stress intensity factors values. The crack direction is predicted using the maximum circumferential theory. Verification of the predicted stress intensity factors and crack path direction are validated with relevant experimental data and numerical results obtained by other researchers with good agreements.
0

335
341


Abdulnaser
Alshoaibi
Department of Mechanical Engineering, Jazan University, P. O. Box 706, Jazan 45142, Kingdom of Saudi Arabia
Saudi Arabia
alshoaibi@gmail.com
Finite element
Linear Elastic Fracture mechanics
Mesh Density
Stress Intensity Factor
[[1] J. A. George, Computer implementation of the finite element method, Ph.D Thesis, Computer Science Stanford University, USA, 1971.##[2] S. Lo, A new mesh generation scheme for arbitrary planar domains, International Journal for Numerical Methods in Engineering, Vol. 21, No. 8, pp. 14031426, 1985.##[3] J. Peraire, M. Vahdati, K. Morgan, O. C. Zienkiewicz, Adaptive remeshing for compressible flow computations, Journal of computational physics, Vol. 72, No. 2, pp. 449466, 1987.##[4] S. Lo, Dynamic grid for mesh generation by the advancing front method, Computers & Structures, Vol. 123, pp. 1527, 2013.##[5] M. Malekan, L. L. Silva, F. B. Barros, R. L. Pitangueira, S. S. Penna, Twodimensional fracture modeling with the generalized/extended finite element method: An objectoriented programming approach, Advances in Engineering Software, Vol. 115, pp. 168193, 2018.##[6] Y. Liu, G. Glass, Choose the Best Element Size to Yield Accurate FEA Results While Reduce FE Models’s Complixity, British Journal of Engineering and Technology, Vols, Vol. 1, pp. 1328, 2013.##[7] N. Benamara, A. Boulenouar, M. Aminallah, N. Benseddiq, On the mixedmode crack propagation in FGMs plates: Comparison of different criteria, Structural Engineering and Mechanics, Vol. 615, No. 3, pp. 371379, 2017.##[8] S. Soman, K. Murthy, P. Robi, A simple technique for estimation of mixed mode (I/II) stress intensity factors, Journal of Mechanics of Materials and Structures, Vol. 13, No. 2, pp. 141154, 2018.##[9] M. Yaylaci, The investigation crack problem through numerical analysis, Structural Engineering and Mechanics, Vol. 57, No. 6, pp. 11431156, 2016.##[10] S. P. Jena, D. R. Parhi, D. Mishra, Comparative study on cracked beam with different types of cracks carrying moving mass, Structural Engineering and Mechanics, Vol. 56, No. 5, pp. 797811, 2015.##[11] S. T. More, R. Bindu, Effect of mesh size on finite element analysis of plate structure, Int. J. Eng. Sci. Innovative Technol, Vol. 4, No. 3, pp. 181185, 2015.##[12] A. M. Alshoaibi, Finite element procedures for the numerical simulation of fatigue crack propagation under mixed mode loading, Structural Engineering and Mechanics, Vol. 35, No. 3, pp. 283299, 2010.##[13] A. M. Alshoaibi, An Adaptive Finite Element Framework for Fatigue Crack Propagation under Constant Amplitude Loading, International Journal of Applied Science and Engineering, Vol. 13, No. 3, pp. 261270, 2015.##[14] R. S. Barsoum, Application of quadratic isoparametric finite elements in linear fracture mechanics, International Journal of Fracture, Vol. 10, No. 4, pp. 603605, 1974.##[15] R. Henshell, K. Shaw, Crack tip finite elements are unnecessary, International journal for numerical methods in engineering, Vol. 9, No. 3, pp. 495507, 1975.##[16] G. V. Guinea, J. Planas, M. Elices, KI evaluation by the displacement extrapolation technique, Engineering fracture mechanics, Vol. 66, No. 3, pp. 243255, 2000.##[17] F. Erdogan, G. Sih, On the crack extension in plates under plane loading and transverse shear, Journal of basic engineering, Vol. 85, No. 4, pp. 519525, 1963.##[18] J. E. Srawley, Wide range stress intensity factor expressions for ASTM E 399 standard fracture toughness specimens, International Journal of Fracture, Vol. 12, No. 3, pp. 475476, 1976.##[19] L. Parnas, Ö. G. Bilir, E. Tezcan, Strain gage methods for measurement of opening mode stress intensity factor, Engineering fracture mechanics, Vol. 55, No. 3, pp. 485492, 1996.##[20] A. Mourad, M. Alghafri, O. A. Zeid, S. Maiti, Experimental investigation on ductile stable crack growth emanating from wirecut notch in AISI 4340 steel, Nuclear engineering and design, Vol. 235, No. 6, pp. 637647, 2005. ##]
1

ON MAXWELL'S STRESS FUNCTIONS FOR SOLVING THREE DIMENSIONAL ELASTICITY PROBLEMS IN THE THEORY OF ELASTICITY
https://jcamech.ut.ac.ir/article_68654.html
10.22059/jcamech.2018.266787.330
1
The governing equations of three dimensional elasticity problems include the six BeltramiMichell stress compatibility equations, the three differential equations of equilibrium, and the six material constitutive relations; and these are usually solved subject to the boundary conditions. The system of fifteen differential equations is usually difficult to solve, and simplified methods are usually used to achieve a solution. Stressbased formulation and displacementbased formulation methods are two common simplified methods for solving elasticity problems.This work adopted a stressbased formulation for a three dimensional elasticity problem. In this work, the Maxwell's stress functions for solving three dimensional problems of elasticity theory were derived from fundamental principles. It was shown that the three Maxwell stress functions identically satisfy all the three differential equations of static equilibrium when body forces were ignored. It was further shown that the three Maxwell stress functions are solutions to the six BeltramiMichell stress compatibility equations if the Maxwell stress functions are potential functions. It was also shown that the Airy's stress functions for two dimensional elasticity problems are special cases of the Maxwell stress functions.
0

342
350


Charles
Ike
Department of Civil Engineering, Enugu State University of Science & Technology, Enugu State, Nigeria
Nigeria
ikecc2007@yahoo.com
Maxwell stress functions
BeltramiMichell stress compatibilty equations
Differential equations of equilibrium
Airy's stress potential functions
[[1] J. R. Barber, 2002, Elasticity, Springer,##[2] P. PodioGuidugli, Elasticity for geotechnicians: a modern exposition of Kelvin, Boussinesq, Flamant, Cerruti, Melan and Mindlin problems. Solid mechanics and its applications, Springer, Switzerland, 2014.##[3] A. Hazel, MATH 350211 Elasticity www. maths. manchester. acuk/~ ahazel/MATHS, Nov, Vol. 30, pp. 2015, 2015.##[4] M. L. Kachanov, B. Shafiro, I. Tsukrov, 2013, Handbook of elasticity solutions, Springer Science & Business Media,##[5] D. Palaniappan, A general solution of equations of equilibrium in linear elasticity, Applied Mathematical Modelling, Vol. 35, No. 12, pp. 54945499, 2011.##[6] S. TIMOSHENKO, J. GOODIER, Theory of Elasticity–Third Edition McGRAWHill International Editions, 1970.##[7] M. H. Sadd, 2009, Elasticity: theory, applications, and numerics, Academic Press,##[8] R. Abeyartne, Continuum Mechanics Volume II of Lecture Notes on The Mechanics of Elastic Solids Cambridge, http, web. mit. edu/abeyartne/lecture_notes. html, Vol. 11, 2012.##[9] I. S. Sokolnikoff, 1956, Mathematical theory of elasticity, McGrawHill book company,##[10] N. I. Muskhelishvili, 2013, Some basic problems of the mathematical theory of elasticity, Springer Science & Business Media,##[11] C. Nwoji, H. Onah, B. Mama, C. Ike, Solution of the Boussinesq problem of half space using Green and Zerna displacement potential function method, The Electronic Journal of Geotechnical Engineering (EJGE), Vol. 22, pp. 43054314, 2017.##[12] C. Ike, First Principles Derivation of a stress function for axially symmetric elasticity problems, and application to Boussinesq problem, Nigerian Journal of Technology, Vol. 36, No. 3, pp. 767772, 2017.##[13] C. Ike, H. Onah, C. Nwoji, Bessel functions for axisymmetric elasticity problems of the elastic half space soil: a potential function method, Nigerian Journal of Technology, Vol. 36, No. 3, pp. 773781, 2017.##[14] C. C. Ike, B. O. Mama, H. N. Onah, C. U. Nwoji, Trefftz Harmonic function method for solving Boussinesq problem, Electronic Journal of Geotechnical Engineering, Vol. 22, pp. 45894601, 2017.##[15] C. Nwoji, H. Onah, B. Mama, C. Ike, Solution of elastic half space problem using Boussinesq displacement potential functions, Asian Journal of Applied Sciences (AJAS), Vol. 5, No. 5, pp. 11001106, 2017.##[16] H. Onah, B. Mama, C. Nwoji, C. Ike, Boussinesq Displacement Potential Functions Method for Finding Vertical Stresses and Displacement fields due to Distributed load on Elastic Half Space, Electronic Journal of Geotechnical Engineering (EJGE), Vol. 22, pp. 56875709.##[17] A. Hadi, A. Rastgoo, A. Daneshmehr, F. Ehsani, Stress and strain analysis of functionally graded rectangular plate with exponentially varying properties, Indian Journal of Materials Science, Vol. 2013, 2013.##[18] A. E. Green, W. Zerna, 1992, Theoretical elasticity, Courier Corporation,##[19] G. B. Airy, IV. On the strains in the Interior of beams, Philosophical transactions of the Royal Society of London, No. 153, pp. 4979, 1863.##[20] J. C. Maxwell, I.—on reciprocal figures, frames, and diagrams of forces, Earth and Environmental Science Transactions of the Royal Society of Edinburgh, Vol. 26, No. 1, pp. 140, 1870.##[21] G. Morera, Soluzione generale delle equazioni indefinite dell'equilibrio di un corpo continuo, Atti Accad. Naz. Lincei, Rend. Cl. Fis. Mat. Natur., V. Ser, Vol. 1, No. 1, pp. 137141, 1892.##[22] E. Beltrami, Osservazioni sulla nota precedente, Atti Accad. Lincei Rend, Vol. 1, No. 5, pp. 141142, 1892.##[23] H. Onah, N. Osadebe, C. Ike, C. Nwoji, Determination of stresses caused by infinitely long line loads on semiinfinite elastic soils using Fourier transform method, Nigerian Journal of Technology, Vol. 35, No. 4, pp. 726731, 2016.##[24] C. C. Ike, Exponential fourier integral transform method for stress analysis of boundary load on soil, Mathematical Modelling of Engineering Problems, Vol. 5, No. 1, pp. 3339, 2018.##]
1

Internal heat source in a temperature dependent thermoelastic half space with microtemperatures
https://jcamech.ut.ac.ir/article_68652.html
10.22059/jcamech.2018.264485.317
1
A two dimensional deformation due to internal heat source in a thermoelastic solid with microtemperatures under the dependence of modulus of elasticity and thermal conductivity on reference temperature has been studied. A mechanical force of constant magnitude is applied at the free surface of thermoelastic half space. The normal modes technique has been applied to obtain the exact expressions for the components of normal displacement, microtemperature, normal force stress, temperature distribution, heat flux moment tensor and tangential couple stress for thermoelastic solid with microtemperatures. The effect of internal heat source, thermal conductivity and microrotation on the derived components have been derived analytically. The graphical results are shown in the presence and absence of thermal conductivity and microrotation to show the appreciable effect of rotation and temperature on the quantities. The problem may also be extended to show the effect of different types of mechanical and thermal sources applied in the medium.
0

351
358


Praveen
Ailawalia
a Department of Mathematics and Humanities, Maharishi Markandeshwar University, SadopurAmbala, Haryana, India
India
praveen_2117@rediffmail.com


Sunil
Sachdeva
Department of Applied Sciences, D. A.V. Institute of Engineering and Technology, Jalandhar, Punjab, India
India
sunilsachdeva.daviet@gmail.com
Thermoelasticity
microtemperatures
Modulus of elasticity
Thermal conductivity
heat source
[[1] A. C. Eringen, E. Suhubi, Nonlinear theory of simple microelastic solids—I, International Journal of Engineering Science, Vol. 2, No. 2, pp. 189203, 1964.##[2] E. Suhubl, A. C. Eringen, Nonlinear theory of microelastic solids—II, International Journal of Engineering Science, Vol. 2, No. 4, pp. 389404, 1964.##[3] A. Eringen, Linear theory of micropolar elasticity", ONR Technical Report No. 29, School of Aeronautics, Aeronautics and Engineering Science, Purdue University, West Lafayette, IN, Purdue University, 1965.##[4] A. C. Eringen, A unified theory of thermomechanical materials, International Journal of Engineering Science, Vol. 4, No. 2, pp. 179202, 1966.##[5] A. C. Eringen, Linear theory of micropolar elasticity, Journal of Mathematics and Mechanics, pp. 909923, 1966.##[6] R. A. Grot, Thermodynamics of a continuum with microstructure, International Journal of Engineering Science, Vol. 7, No. 8, pp. 801814, 1969.##[7] P. Říha, On the microcontinuum model of heat conduction in materials with inner structure, International Journal of Engineering Science, Vol. 14, No. 6, pp. 529535, 1976.##[8] D. I. Quintanilla, R, On a theory of thermoelasticity with microtemperatures, Journal of Thermal Stresses, Vol. 23, No. 3, pp. 199215, 2000.##[9] D. Ieşan, On a theory of micromorphic elastic solids with microtemperatures, Journal of Thermal Stresses, Vol. 24, No. 8, pp. 737752, 2001.##[10] M. Ezzat, M. Othman, A. ElKaramany, The dependence of the modulus of elasticity on the reference temperature in generalized thermoelasticity, Journal of thermal stresses, Vol. 24, No. 12, pp. 11591176, 2001.##[11] P. S. Casas, R. Quintanilla, Exponential stability in thermoelasticity with microtemperatures, International Journal of Engineering Science, Vol. 43, No. 12, pp. 3347, 2005.##[12] A. Scalia, M. Svanadze, On the representations of solutions of the theory of thermoelasticity with microtemperatures, Journal of Thermal Stresses, Vol. 29, No. 9, pp. 849863, 2006.##[13] D. Ieşan, Thermoelasticity of bodies with microstructure and microtemperatures, International Journal of Solids and Structures, Vol. 44, No. 2526, pp. 86488662, 2007.##[14] M. Aouadi, Some theorems in the isotropic theory of microstretch thermoelasticity with microtemperatures, Journal of Thermal Stresses, Vol. 31, No. 7, pp. 649662, 2008.##[15] D. Ie? an, R. Quintanilla, On thermoelastic bodies with inner structure and microtemperatures, Journal of Mathematical Analysis and Applications, Vol. 354, No. 1, pp. 1223, 2009.##[16] A. Scalia, M. Svanadze, R. Tracinà, Basic theorems in the equilibrium theory of thermoelasticity with microtemperatures, Journal of Thermal Stresses, Vol. 33, No. 8, pp. 721753, 2010.##[17] R. Quintanilla, On growth and continuous dependence in thermoelasticity with microtemperatures, Journal of Thermal Stresses, Vol. 34, No. 9, pp. 911922, 2011.##[18] H. Steeb, J. Singh, S. K. Tomar, Time harmonic waves in thermoelastic material with microtemperatures, Mechanics Research Communications, Vol. 48, pp. 818, 2013.##[19] S. Chiriţă, M. Ciarletta, C. D’Apice, On the theory of thermoelasticity with microtemperatures, Journal of Mathematical Analysis and Applications, Vol. 397, No. 1, pp. 349361, 2013.##[20] R. Kumar, M. Kaur, Reflection and refraction of plane waves at the interface of an elastic solid and microstretch thermoelastic solid with microtemperatures, Archive of Applied Mechanics, Vol. 84, No. 4, pp. 571590, 2014.##[21] N. Noda, Thermal stresses in materials with temperaturedependent properties, Applied Mechanics Reviews, Vol. 44, No. 9, pp. 383397, 1991.##[22] H. M. Youssef, Dependence of modulus of elasticity and thermal conductivity on reference temperature in generalized thermoelasticity for an infinite material with a spherical cavity, Applied Mathematics and Mechanics, Vol. 26, No. 4, pp. 470475, 2005.##[23] M. I. Othman, K. Lotfy, Twodimensional problem of generalized magnetothermoelasticity with temperature dependent elastic moduli for different theories, Multidiscipline Modeling in Materials and Structures, Vol. 5, No. 3, pp. 235242, 2009.##[24] M. A. Biot, 1964, Mechanics of incremental deformations,##[25] R. Kumar, S. Devi, Thermomechanical intereactions in porous generalized thermoelastic material permeated with heat sources, Multidiscipline Modeling in Materials and Structures, Vol. 4, No. 3, pp. 237254, 2008.##[26] K. Lotfy, Transient disturbance in a halfspace under generalized magnetothermoelasticity with a stable internal heat source under three theories, Multidiscipline Modeling in Materials and Structures, Vol. 7, No. 1, pp. 7390, 2011.##[27] K. Lotfy, Transient thermoelastic disturbances in a viscoelastic semispace due to moving internal heat source, International Journal of Structural integrity, Vol. 2, No. 3, pp. 264280, 2011.##[28] M. Othman, State space approach to the generalized thermoelastic problem with temperaturedependent elastic moduli and internal heat sources, Journal of applied mechanics and technical physics, Vol. 52, No. 4, pp. 644, 2011.##[29] R. Kumar, S. Devi, Deformation in porous thermoelastic material with temperature dependent properties, Applied Mathematics & Information Sciences, Vol. 5, No. 1, pp. 132147, 2011.##[30] P. Ailawalia, S. Budhiraja, Internal Heat Source in Temperature Rate Dependent Thermoelastic Medium with Hydrostatic Initial Stress, Mechanics and Mechanical Engineering, Vol. 20, No. 3, pp. 263277, 2016.##[31] M. I. Othman, M. E. Zidan, M. I. Hilal, Effect of gravitational field and temperature dependent properties on twotemperature thermoelastic medium with voids under GN theory, Computers, Materials & Continua, Vol. 40, No. 3, pp. 179201, 2014.##[32] R. Kumar, M. Kaur, S. Rajvanshi, Plane wave propagation in microstretch thermoelastic medium with microtemperatures, Journal of Vibration and Control, Vol. 21, No. 16, pp. 34033416, 2015.##[33] P. Ailawalia, S. K. Sachdeva, D. Pathania, Two dimensional deformation in microstretch thermoelastic half space with microtemperatures and internal heat source, Cogent Mathematics, Vol. 2, No. 1, pp. 1086293, 2015.##[34] P. Ailawalia, S. K. Sachdeva, D. S. Pathania, Plane strain problem in a rotating microstretch thermoelastic solid with microtemperatures, Theoretical and Applied Mechanics, Vol. 44, No. 1, pp. 5182, 2017.##[35] A. C. Eringen, Plane waves in nonlocal micropolar elasticity, International Journal of Engineering Science, Vol. 22, No. 810, pp. 11131121, 1984.##[36] R. Dhaliwal, A. Singh, Dynamic coupled thermoelasticity Hindustan Publ, Corp., New Delhi, 1980. ##]
1

Impeller and volute design and optimization of the centrifugal pump with low specific speed in order to extract performance curves
https://jcamech.ut.ac.ir/article_64656.html
10.22059/jcamech.2018.246099.211
1
Now a day centrifugal pumps are vital components of industries. Certainly, one of the most important specifications of centrifugal pumps are the performance curves. In the present work, performance curves of a centrifugal pumps are obtained by Computational fluid dynamics (CFD) and as an outcome, CFD results compare by practical curves. At the first step impeller and volute are designed with two standards and at the end former design completed by automatic design process using CFturbo software. For this purpose, full 3DRANS equations in coupled with SST turbulence model are solved for several flow rate between 20% and 140% of the operation condition by means of a commercial code, CFX. This simulation is defined by means of the multireference frame technique in which the impeller is situated in the rotating reference frame, and the volute is in the fixed reference frame. Proposed simulation is based on a steady state flow, nonNewtonian, incompressible and constant property condition. Operation point is simulated to get the total head and then nonoperation points are simulated to obtain performance curves. Practical curves and numerical ones are in good agreement, so numerical approach could be a perfect way to make centrifugal pump design better and easier. Indeed pump simulation with CFD approach can increase our knowledge about pump behavior such as consumption energy, trimming process and saving energy before we have any activities on the pump so the predictions have bettering and excise about any process on the pump.
0

359
366


Amir
Javanbakht
Department of Mechanical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
Iran
am_javan@yahoo.com


hossein
ahmadi danesh ashtian
Department of Mechanical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
Iran
h_a_danesh@azad.ac.ir
Turbulence fluid flow
Centrifugal pump design
Computational fluid dynamic (CFD)
Centrifugal pump curves
Periodic boundary condition
[[1] P. Cooper, E. Graf, T. Luce, Computational fluid dynamical analysis of complex internal flows in centrifugal pumps, in Proceeding of, 8394.##[2] A. Bahreini, A. Sattari, Numerical and Economic Study of Centrifugal Pumps As Turbine Performance, JCAMECH, Vol. 48, No. 2, pp. 151159, 2017.##[3] F. A. Muggli, P. Holbein, P. Dupont, CFD calculation of a mixed flow pump characteristic from shutoff to maximum flow, Journal of fluids engineering, Vol. 124, No. 3, pp. 798802, 2002.##[4] J. González, J. Fernández, E. Blanco, C. Santolaria, Numerical simulation of the dynamic effects due to impellervolute interaction in a centrifugal pump, Journal of Fluids Engineering, Transactions of the ASME, Vol. 124, No. 2, pp. 348355, 2002.##[5] J. F. Guelich, J. N. Favre, K. Denus, An assement of pump impeller performance predictions by 3D NavierStokes calculations, Proceedings of the ASME Fluids Engineering Division Summer Meeting, 1997.##[6] M. Asuaje, F. Bakir, S. Kouidri, F. Kenyery, R. Rey, Numerical modelization of the flow in centrifugal pump: Volute influence in velocity and pressure fields, International Journal of Rotating Machinery, Vol. 3, No. 3, pp. 244255, 2005.##[7] H. Stel, G. D. L. Amaral, C. O. R. Negrão, S. Chiva, V. Estevam, R. E. M. Morales, Numerical Analysis of the Fluid Flow in the First Stage of a TwoStage Centrifugal Pump With a Vaned Diffuser, Journal of Fluids Engineering, Vol. 135, No. 7, pp. 071104071104, 2013.##[8] M. H. Shojaeefard, M. Tahani, M. B. Ehghaghi, M. A. Fallahian, M. Beglari, Numerical study of the effects of some geometric characteristics of a centrifugal pump impeller that pumps a viscous fluid, Computers & Fluids, Vol. 60, pp. 6170, 5/15/, 2012.##[9] H. Alemi, S. A. Nourbakhsh, M. Raisee, A. F. Najafi, Effects of volute curvature on performance of a low specificspeed centrifugal pump at design and offdesign conditions, Journal of Turbomachinery, Vol. 137, No. 4, pp. 041009, 2015.##[10] Z. Gao, W. Zhu, L. Lu, J. Deng, J. Zhang, F. Wuang, Numerical and experimental study of unsteady flow in a large centrifugal pump with stay vanes, Journal of Fluids Engineering, Vol. 136, No. 7, pp. 071101, 2014.##[11] M. Nataraj, R. Ragoth Singh, Analyzing pump impeller for performance evaluation using RSM and CFD, Desalination and Water Treatment, Vol. 52, No. 3436, pp. 68226831, 2014/10/15, 2014.##[12] Y. Fu, J. Yuan, S. Yuan, G. Pace, L. d'Agostino, P. Huang, X. Li, Numerical and Experimental Analysis of Flow Phenomena in a Centrifugal Pump Operating Under Low Flow Rates, Journal of Fluids Engineering, Vol. 137, No. 1, pp. 011102011102, 2014.##[13] Y. Wang, H. Liu, D. Liu, S. Yuan, J. Wang, L. Jiang, Application of the twophase threecomponent computational model to predict cavitating flow in a centrifugal pump and its validation, Computers & Fluids, Vol. 131, pp. 142150, 2016.##[14] J. F. Gülich, 2007, Centrifugal Pumps, Springer Berlin Heidelberg,##[15] A. inc, Ansys CFX solver theory guide, 2014.##[16] S. Y. M. Tan, H. Lin, Numerical Research on Performance Prediction for Centrifugal Pumps, Chinese journal of mechanical engineering, No. No. 1, pp. 2128, 2010. ##]
1

Fatigue and Anisotropic behaviours of cold rolled AA1200 Aluminium Alloy
https://jcamech.ut.ac.ir/article_65822.html
10.22059/jcamech.2018.255756.262
1
This study examines the fatigue and anisotropy behaviour of cold rolled AA1200 aluminium alloy for light weight automotive connecting rod application. Aluminium (Al) 1200 ingots were melted at temperature of 680 0C (after one hour of heating) cast in sand mould and cast samples homogenized for 6 hrs at 480 0C. The cold rolling process was carried out after homogenisation for 10, 20, 30, 40 and 50% thickness reductions. The samples were characterised in 00, 150, 300, 450, 600, 750 and 900 to the rolling direction. The results show that degree of deformation increase linearly with mean stress, stress range, stress ratio, stress amplitude, thickness and area ratio for all the reductions and directions examined. Area and thickness ratio increases linearly with deformation at higher inclination (> 150). The fatigue life obtained in this work shows life cycles at different degrees of deformation: 7.5 x 104 cycles at 10% reduction, 1.3 x105 cycles at 20% reduction, 4.3 x 104 cycles at 30% reduction; 2.6 x 105 cycles at 40% reduction and 1.09 x 105 cycles at 50% reduction). The results of this study provide evidence that systemic controlled cold deformation can potentially be used to significantly enhance the fatigue life of AA1200 aluminium alloy components subjected to cyclic loadings.
0

367
372


Manasseh
Oyekeye
Department of Mechanical Engineering, University of Lagos, Nigeria.
Nigeria
moyekeye@unilag.edu.ng


Joseph
Ajiboye
Department of Mechanical Engineering, University of Lagos, Nigeria
Nigeria
jaesehinde@yahoo.com


Samson
Adeosun
Department of Metallurgical and Materials Engineering, University of Lagos, Nigeria
Nigeria
samsonoluropo@yahoo.com
Aluminium alloy
Anisotropy
Cold rolling
Fatigue parameters
[References##[1] C. Zamponi, M. Haaks, I. Müller, T. Staab, G. Tempus, K. Maier, Investigation of fatigue cracks in aluminium alloys 2024 and 6013 in laboratory air and corrosive environment, Journal of materials science, Vol. 39, No. 23, pp. 69516956, 2004.##[2] K. Nocke, F. Bergner, H. Bersch, I. Haase, H. Worch, G. Tempus, E. Loechelt, Environment‐sensitive fracture of aluminium alloy 6013, Materials and Corrosion, Vol. 51, No. 9, pp. 628634, 2000.##[3] I. Haase, K. Nocke, H. Worch, G. Zouhar, G. Tempus, An Investigation of the fatigue behaviour of the aluminium alloy AA 6013 T6 in a corrosive medium, Praktische MetallographiePractical Metallography, Vol. 38, No. 3, pp. 119137, 2001.##[4] R. Oskouei, R. Ibrahim, Improving fretting fatigue behaviour of Al 7075T6 bolted plates using electroless Ni–P coatings, International Journal of Fatigue, Vol. 44, pp. 157167, 2012.##[5] F. Wang, J. Xu, J. Li, X. Li, H. Wang, Fatigue crack initiation and propagation in A356 alloy reinforced with in situ TiB2 particles, Materials & Design, Vol. 33, pp. 236241, 2012.##[6] P. Peralta, R. Dickerson, N. Dellan, K. Komandur, M. Jameel, Effects of local grain orientation on fatigue crack growth in multicrystalline fcc metallic materials, Journal of engineering materials and technology, Vol. 127, No. 1, pp. 2332, 2005.##[7] I. Westermann, K. E. Snilsberg, Z. Sharifi, O. S. Hopperstad, K. Marthinsen, B. Holmedal, Threepoint bending of heattreatable aluminum alloys: influence of microstructure and texture on bendability and fracture behavior, Metallurgical and Materials Transactions A, Vol. 42, No. 11, pp. 33863398, 2011.##[8] D. Jiang, C. Wang, Influence of microstructure on deformation behavior and fracture mode of Al–Mg–Si alloys, Materials Science and Engineering: A, Vol. 352, No. 12, pp. 2933, 2003.##[9] T. Savaşkan, A. P. Hekimoğlu, Effect of quench–ageing treatment on the microstructure and properties of Zn15Al3Cu alloy, International Journal of Materials Research, Vol. 106, No. 5, pp. 481487, 2015.##[10] J. B. Zhang, Y. A. Zhang, B. H. Zhu, R. Q. Liu, F. Wang, Q. M. Liang, Characterization of microstructure and mechanical properties of Al–Cu–Mg–Ag–(Mn/Zr) alloy with high Cu: Mg, Materials & Design, Vol. 49, pp. 311317, 2013.##[11] R. Oskouei, R. Ibrahim, The effect of clamping compressive stresses on the fatigue life of Al 7075T6 bolted plates at different temperatures, Materials & Design, Vol. 34, pp. 9097, 2012.##[12] T. Savaşkan, H. Tan, Fatigue behaviour of Al–25Zn–3Cu alloy, Materials Science and Technology, Vol. 30, No. 8, pp. 938943, 2014.##[13] M. Rahmat, R. Ibrahim, R. Oskouei, A study on the combined effect of notch and fretting on the fatigue life behaviour of Al 7075T6, Materials & Design, Vol. 60, pp. 136145, 2014.##[14] C. RubioGonzález, J. Ocana, G. GomezRosas, C. Molpeceres, M. Paredes, A. Banderas, J. Porro, M. Morales, Effect of laser shock processing on fatigue crack growth and fracture toughness of 6061T6 aluminum alloy, Materials Science and Engineering: A, Vol. 386, No. 12, pp. 291295, 2004.##[15] H. Shi, E.H. Han, F. Liu, S. Kallip, Protection of 2024T3 aluminium alloy by corrosion resistant phytic acid conversion coating, Applied Surface Science, Vol. 280, pp. 325331, 2013.##[16] J. Vázquez, C. Navarro, J. Domínguez, Experimental results in fretting fatigue with shot and laser peened Al 7075T651 specimens, International Journal of Fatigue, Vol. 40, pp. 143153, 2012.##[17] É. F. Prados, V. L. Sordi, M. Ferrante, Microstructural development and tensile strength of an ECAP: deformed Al4 wt.(%) Cu alloy, Materials Research, Vol. 11, No. 2, pp. 199205, 2008.##[18] W. A. Ayoola, A. Oyetunji, EFFECT OF DEFORMATION AND ANNEALING PROCESSING ON TEXTURE AND MECHANICAL PROPERTIES OF ALUMINUM ALLOY AA1200, 2014.##[19] D. Kemal, A. Vanja, R. Dragan, The Influence of Extrusion Process and Heat Treatment on the Properties of some AA6000 Extruded Profiles, Material Technology (MTAEC9), Vol. 39, No. 4, pp. 101106, 2005.##[20] N. Ejaz, W. Muhammad, I. U. Salam, Fatigue Crack Growth Behavior in a Rolled Plate of Aluminum Alloy, in Proceeding of, Trans Tech Publ, pp. 283293.##[21] W. Hosford, Mechanical behavior of materialsCambridge Universtity Press, Cambridge, 2010.##[22] R. Z. Valiev, N. Krasilnikov, N. Tsenev, Plastic deformation of alloys with submicrongrained structure, Materials Science and Engineering: A, Vol. 137, pp. 3540, 1991.##[23] Y. Wei, Anisotropic size effect in strength in coherent nanowires with tilted twins, Physical Review B, Vol. 84, No. 1, pp. 014107, 2011.##[24] B. Q. Han, F. A. Mohamedh, E. J. Lavernia, In: Severe Plastic Deformation ISBN 1594545081 Editor: Burhanettin S. Altan, pp. 95112© 2006 Nova Science Publishers, Inc, Severe Plastic Deformation: Toward Bulk Production of Nanostructured Materials, pp. 95, 2006.##[25] G. Zhang, B. Li, J. Zhang, Z. Feng, Z. Wei, W. Cai, Unique cyclic deformation behavior of a heavily alloyed Al–Si piston alloy at different temperatures, Progress in Natural Science: Materials International, Vol. 22, No. 5, pp. 445451, 2012.##[26] J. M. Rosalie, H. Somekawa, A. Singh, T. Mukai, The effect of size and distribution of rodshaped β1′ precipitates on the strength and ductility of a Mg–Zn alloy, Materials Science and Engineering: A, Vol. 539, pp. 230237, 2012.##[27] J. M. Rosalie, H. Somekawa, A. Singh, T. Mukai, Effect of precipitation on strength and ductility in a Mg–Zn–Y alloy, Journal of Alloys and Compounds, Vol. 550, pp. 114123, 2013.##[28] U. Krupp, 2007, Fatigue crack propagation in metals and alloys: microstructural aspects and modelling concepts, John Wiley & Sons,##[29] C. Bjerkén, S. Melin, Growth of a short fatigue crack–A long term simulation using a dislocation technique, International Journal of Solids and Structures, Vol. 46, No. 5, pp. 11961204, 2009.##[30] L. Borrego, L. Abreu, J. Costa, J. Ferreira, Analysis of low cycle fatigue in AlMgSi aluminium alloys, Engineering Failure Analysis, Vol. 11, No. 5, pp. 715725, 2004.##[31] R. T. Dewa, S. J. Kim, W. G. Kim, E. S. Kim, Effect of strain range on the low cycle fatigue in alloy 617 at high temperature, Metals, Vol. 7, No. 2, pp. 54, 2017.##[32] F. C. Campbell, 2008, Elements of metallurgy and engineering alloys, ASM International,##[33] M. O. Oyekeye, J. S. Ajiboye, S. O. Adeosun, Fatigue and Anisotropic behaviours of cold rolled AA1200 Aluminium Alloy.##[34] J. Major, Porosity control and fatigue behavior in A356T61 aluminum alloy, TransactionsAmerican Foundrymens Society, pp. 901906, 1998.##[35] W. Roundi, A. Elgharad, Assessment of Fatigue Behavior and Effects of Crack Growth in Aluminium Alloys 6082 under Various Stress Ratios, International Journal on Advanced Science, Engineering and Information Technology, Vol. 6, No. 5, pp. 582587, 2016.##]
1

Effects of Casting Speed and Runner Angle on Macrosegregation of AluminiumCopper Alloy.
https://jcamech.ut.ac.ir/article_66042.html
10.22059/jcamech.2018.256663.274
1
Abstract During the solidification of binary metal alloys, chemical heterogeneities at product scale over a long distance range (1cm1m) develop and this has detrimental effect on the resulting mechanical properties of cast products. Macrosegregation is of great concern to alloy manufacturers and end users as this problem persist. In this study, the use of process parameters namely casting speed and runner angle to reduce macrosegregation in aluminumcopperzinc binary alloy solidification is reported. The results from optical microscope, scanning electron microscope and energy dispersive spectrometry show that these parameters significantly influenced the development, size and volume of macrosegregation. The combination of parameters namely the pouring height between 96 mm/s, 100mm/s, and runner angles between 1200, 1500 produced less segregations with improved mechanical properties within standard specification. The tensile strength (110 MPa), modulus of elasticity (6800 MPa) and 2.5 % elongation obtained in this study are within standard (88 124 MPa), 7100 MPa and (125 %) respectively for this class of alloy.
0

373
379


Victoria
Obiekea
Department of Metallurgical and Materials Engineering, Faculty of Engineering, University of Lagos, Akoka, Yaba, Nigeria.
Nigeria
dumebiobiekea@yahoo.com


Israel
Sekunowo
Department of Metallurgical and Materials Engineering, Faculty of Engineering, University of Lagos, Akoka, Yaba, Nigeria.
Nigeria
olatundeisrael@yahoo.co.uk


Mike
Sobamowo
Department of Mechanical Engineering, University of Lagos, Nigeria
Nigeria
mikegbeminiyi@gmail.com


Samson
Adeosun
Department of Metallurgical and Materials Engineering, Faculty of Engineering, University of Lagos, Akoka, Yaba, Nigeria.
Nigeria
samsonoluropo@yahoo.com
Key Words: Binary Alloy
Casting Speed
MacroSegregation
Mechanical Property
Runner Angle
[[1] A. Jafaria, S. Seyedeina, M. Aboutalebia, D. Eskinb, L. Katgermanb, Numerical Modeling of Macrosegregation during the DirectChill Casting of an Al alloy Billet, Iranian Journal of Materials Science and Engineering, Vol. 7, No. 3, pp. 00, 2010.##[2] Y. Wang, S. Wu, X. Xue, R. Chen, J. Zhang, W. Xiao, Experimental and numerical study on formation mechanism of linear macrosegregation in lowpressure die casting of Al–Cu–Mn–Ti Alloy, Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Vol. 231, No. 10, pp. 19461955, 2017.##[3] M. Ahmadein, M. Wu, A. Ludwig, Analysis of macrosegregation formation and columnartoequiaxed transition during solidification of Al4 wt.% Cu ingot using a 5phase model, Journal of crystal growth, Vol. 417, pp. 6574, 2015.##[4] K. C. Bala, R. H. Khan, Rate of solidification of aluminium casting in varying wall thickness of cylindrical metallic moulds, Leonardo Journal of Sciences, Vol. 13, No. 25, pp. 1930, 2014.##[5] K. Fezi, A. Plotkowski, M. J. M. Krane, Macrosegregation modeling during directchill casting of aluminum alloy 7050, Numerical Heat Transfer, Part A: Applications, Vol. 70, No. 9, pp. 939963, 2016.##[6] B. S. Kamble, S. M. Kadane, Design of Gating System, Metal Flow and Solidification for a Die Casting Component Using Virtual Simulation Technique, International Research Journal of Engineering and Technology [IRJET], Vol. 3, No. 6, pp. 16901695, 2016.##[7] Y. Yin, J. Zhou, Z. Guo, H. Wang, D. Liao, T. Chen, The Through Process Simulation of Mold filling, Solidification, and Heat Treatment of the Al Alloy Bending Beam Lowpressure Casting, in Proceeding of, IOP Publishing, pp. 012043.##[8] M. O. ElBealy, Macrosegregation quality criteria and mechanical soft reduction for central quality problems in continuous casting of steel, Materials Sciences and Applications, Vol. 5, No. 10, pp. 724, 2014.##[9] Z. Duan, X. Du, H. Shen, B. Liu, Numerical study of macrosegregation in a large steel ingot with multiple pouring process, in Proceeding of, IOP Publishing, pp. 012048.##[10] N. Jamaly, N. Haghdadi, A. Phillion, Microstructure, macrosegregation, and thermal analysis of direct chill cast aa5182 aluminum alloy, Journal of Materials Engineering and Performance, Vol. 24, No. 5, pp. 20672073, 2015.##[11] D. G. Eskin, V. I. Savran, L. Katgerman, Effects of melt temperature and casting speed on the structure and defect formation during directchill casting of an AlCu alloy, Metallurgical and Materials Transactions A, Vol. 36, No. 7, pp. 19651976, 2005.##[12] M. Blair, R. Monroe, C. Beckermann, The Effect of Pour Time and Head Height on Air Entrainment, in Proceeding of.##[13] J. Zeng, W. Chen, Effect of secondary cooling conditions on solidification structure and central macrosegregation in continuously cast highcarbon rectangular billet, High Temperature Materials and Processes, Vol. 34, No. 6, pp. 577583, 2015.##[14] V. L. H. N. T. POLJE, K. U. G. I. JEKLA, Impact of casting speed on the temperature field of continuously cast steel billets, Materiali in tehnologije, Vol. 47, No. 4, pp. 507513, 2013.##[15] D. G. Eskin, 2008, Physical metallurgy of direct chill casting of aluminum alloys, CRC press,##[16] P. Serrao, B. Chiranth, N. Vaz, A. Fernandis, P. Rao, Effect of Equal Chanel Angular Pressing and Age Hardening on the Hardness of AlMgSi Alloy, American Journal of Materials Science, Vol. 7, No. 5, pp. 150155, 2017.##[17] S. Manasijevic, R. Radisa, S. Markovic, Z. AcimovicPavlovic, K. Raic, Thermal analysis and microscopic characterization of the piston alloy AlSi13Cu4Ni2Mg, Intermetallics, Vol. 19, No. 4, pp. 486492, 2011.##[18] Y. Cho, H.C. Lee, K. Oh, A. Dahle, Effect of strontium and phosphorus on eutectic AlSi nucleation and formation of βAl 5 FeSi in hypoeutectic AlSi foundry alloys, Metallurgical and Materials Transactions A, Vol. 39, No. 10, pp. 24352448, 2008.##[19] S. Steinbach, L. Ratke, G. Zimmermann, O. Budenkova, Formation of intermetallic phases in AlSi7Fe1 alloy processed under microgravity and forced fluid flow conditions and their influence on the permeability, in Proceeding of, IOP Publishing, pp. 012019.##[20] D. V. Malakhov, D. Panahi, M. Gallerneault, On the formation of intermetallics in rapidly solidifying Al–Fe–Si alloys, Calphad, Vol. 34, No. 2, pp. 159166, 2010.##[21] G. MrówkaNowotnik, J. Sieniawski, M. Wierzbińska, Intermetallic phase particles in 6082 aluminium alloy, Archives of Materials Science and Engineering, Vol. 28, No. 2, pp. 6976, 2007.##[22] C. Charitidis, E. Koumoulos, V. Nikolakis, D. Dragatogiannis, Structural and nanomechanical properties of a zeolite membrane measured using nanoindentation, Thin Solid Films, Vol. 526, pp. 168175, 2012.##]
1

Dynamic behaviour of concrete containing aggregate resonant frequency
https://jcamech.ut.ac.ir/article_68967.html
10.22059/jcamech.2018.269048.339
1
The need to design blast resistant civilian structures has arisen due to aggressor attacks on many civilian structures around the world. Achieving vibration and wave attenuation with locally resonant metamaterials has attracted a great deal of consideration due to their frequency dependent negative effective mass density. In this paper, metaconcrete, a new material with exceptional properties is formed. The aggregates in concrete are substituted with spherical inclusions consisting of a heavy metal core coated with a soft outer layer. The physics of the metamaterial was first established, and mass in massspring and effective mass system were shown to be equivalent. Then the engineered aggregate was tuned so that band gap was activated due to resonant oscillations of the replaced aggregate. In the numerical experiment conducted, the resonant behaviour causes the wave to be forbidden in the targeted frequencies. The proposed metaconcrete could be very useful in various civil engineering applications where vibration suspension and wave attenuation ability are in high demand.
0

380
385


Akintoye
Oyelade
Civil and Environmental Engineering, Faculty of Engineering, University of Lagos, Akoka, Nigeria
Nigeria
oyelade.akintoye@gmail.com


Yetunde
Abiodun
Civil and Environmental Engineering, Faculty of Engineering
University of Lagos, Akoka, Nigeria
Nigeria
yaabiodun@unilag.edu.ng


Mufutau
Sadiq
Civil and Environmental Engineering, Faculty of Engineering
University of Lagos, Akoka, Nigeria
Nigeria
oosadiq@unilag.edu.ng
Metaconcrete
wave attenuation
metamaterial
negative mass density
[[1] H. H. Huang, C. T. Sun, G. L. Huang, On the negative effective mass density in acoustic metamaterials, International Journal of Engineering Science, Vol. 47, No. 4, pp. 610617, 2009/04/01/, 2009.##[2] Y. Wu, Y. Lai, Z.Q. Zhang, Elastic metamaterials with simultaneously negative effective shear modulus and mass density, Physical review letters, Vol. 107, No. 10, pp. 105506, 2011.##[3] Y. Li, L. Zhu, T. Chen, Platetype elastic metamaterials for lowfrequency broadband elastic wave attenuation, Ultrasonics, Vol. 73, pp. 3442, 2017.##[4] X. Zhou, X. Liu, G. Hu, Elastic metamaterials with local resonances: an overview, Theoretical and Applied Mechanics Letters, Vol. 2, No. 4, 2012.##[5] A. Khelif, Y. Achaoui, B. Aoubiza, Locally Resonant Structures for Low Frequency Surface Acoustic Band Gap Applications, in: Acoustic Metamaterials, Eds., pp. 4359: Springer, 2013.##[6] Z. Liu, X. Zhang, Y. Mao, Y. Zhu, Z. Yang, C. T. Chan, P. Sheng, Locally resonant sonic materials, science, Vol. 289, No. 5485, pp. 17341736, 2000.##[7] X. Wang, Dynamic behaviour of a metamaterial system with negative mass and modulus, International Journal of Solids and Structures, Vol. 51, No. 78, pp. 15341541, 2014.##[8] A. Movchan, S. Guenneau, Splitring resonators and localized modes, Physical Review B, Vol. 70, No. 12, pp. 125116, 2004.##[9] N. Fang, D. Xi, J. Xu, M. Ambati, W. Srituravanich, C. Sun, X. Zhang, Ultrasonic metamaterials with negative modulus, Nature materials, Vol. 5, No. 6, pp. 452, 2006.##[10] Z. G. Wang, S. H. Lee, C. K. Kim, C. M. Park, K. Nahm, S. Nikitov, Acoustic wave propagation in onedimensional phononic crystals containing Helmholtz resonators, Journal of Applied Physics, Vol. 103, No. 6, pp. 064907, 2008.##[11] K. T. Tan, H. Huang, C. Sun, Blastwave impact mitigation using negative effective mass density concept of elastic metamaterials, International Journal of Impact Engineering, Vol. 64, pp. 2029, 2014.##[12] S. H. Lee, O. B. Wright, Origin of negative density and modulus in acoustic metamaterials, Physical Review B, Vol. 93, No. 2, pp. 024302, 2016.##[13] J. S. Jensen, Phononic band gaps and vibrations in oneand twodimensional mass–spring structures, Journal of Sound and Vibration, Vol. 266, No. 5, pp. 10531078, 2003.##[14] R. Halir, P. J. Bock, P. Cheben, A. Ortega‐Moñux, C. Alonso‐Ramos, J. H. Schmid, J. Lapointe, D. X. Xu, J. G. Wangüemert‐Pérez, Í. Molina‐Fernández, Waveguide sub‐wavelength structures: a review of principles and applications, Laser & Photonics Reviews, Vol. 9, No. 1, pp. 2549, 2015.##[15] Y.J. Park, A. H.S. Ang, Mechanistic seismic damage model for reinforced concrete, Journal of structural engineering, Vol. 111, No. 4, pp. 722739, 1985.##[16] X. Kong, Q. Fang, H. Wu, J. Hong, A comparison of strainrate enhancement approaches for concrete material subjected to high strainrate, International Journal of Protective Structures, Vol. 8, No. 2, pp. 155176, 2017.##[17] P. Aggarwal, R. Siddique, Y. Aggarwal, S. M. Gupta, Selfcompacting concreteprocedure for mix design, Leonardo electronic journal of practices and technologies, Vol. 12, pp. 1524, 2008.##[18] J. Dewar, Concrete mix design, 2003.##[19] C. T. Kennedy, The design of concrete mixes, in Proceeding of, 373400.##[20] S. J. Mitchell, A. Pandolfi, M. Ortiz, Metaconcrete: designed aggregates to enhance dynamic performance, Journal of the Mechanics and Physics of Solids, Vol. 65, pp. 6981, 2014.##[21] D. Briccola, M. Ortiz, A. Pandolfi, Experimental validation of metaconcrete blast mitigation properties, Journal of Applied Mechanics, Vol. 84, No. 3, pp. 031001, 2017.##[22] S. J. Mitchell, A. Pandolfi, M. Ortiz, Investigation of elastic wave transmission in a metaconcrete slab, Mechanics of Materials, Vol. 91, pp. 295303, 2015.##[23] Y. Lu, K. Xu, Modelling of dynamic behaviour of concrete materials under blast loading, International Journal of Solids and Structures, Vol. 41, No. 1, pp. 131143, 2004.##[24] M. Zineddin, T. Krauthammer, Dynamic response and behavior of reinforced concrete slabs under impact loading, International Journal of Impact Engineering, Vol. 34, No. 9, pp. 15171534, 2007.##[25] G. Hu, L. Tang, R. Das, S. Gao, H. Liu, Acoustic metamaterials with coupled local resonators for broadband vibration suppression, AIP Advances, Vol. 7, No. 2, pp. 025211, 2017.##[26] S. Yao, X. Zhou, G. Hu, Experimental study on negative effective mass in a 1D mass–spring system, New Journal of Physics, Vol. 10, No. 4, pp. 043020, 2008.##[27] H.H. Huang, Dynamic characteristics of an acoustic metamaterial with locally resonant microstructures, Thesis, Purdue University, 2009.##[28] C. Albertini, E. Cadoni, K. Labibes, Study of the mechanical properties of plain concrete under dynamic loading, Experimental Mechanics, Vol. 39, No. 2, pp. 137141, June 01, 1999.##[29] L. Yuan, T. Xu, Q. Xu, Spallation of Concrete under Dynamic Loading: Mesh Size Effect, in Proceeding of, Trans Tech Publ, pp. 929933.##[30] S. Wang, M.H. Zhang, S. T. Quek, Mechanical behavior of fiberreinforced highstrength concrete subjected to high strainrate compressive loading, Construction and Building Materials, Vol. 31, pp. 111, 2012.##]
1

Magnetomechanical Stimulation of Bone Marrow Mesenchymal Stromal Cells for Chondrogenic Differentiation Studies
https://jcamech.ut.ac.ir/article_68968.html
10.22059/jcamech.2018.265180.324
1
Mechanical interaction of cells and their surroundings are prominent in mechanically active tissues such as cartilage. Chondrocytes regulate their growth, matrix synthesis, metabolism, and differentiation in response to mechanical loadings. Cells sense and respond to applied physical forces through mechanosensors such as integrin receptors. Herein, we examine the role of mechanical stimulation of integrins in regards to their mechanotransduction ability to promote chondrogenesis. For this purpose, magnetic nanoparticles were chemically bonded to cell membrane mechanoreceptors and stimulated. Histological results showed the endocytosis of nanoparticles over the experimental period, pointing out the inefficient mechanical stimulation of the mechanoreceptors. Moreover, gene expression analysis only showed significant upregulation for SOX9, whereas type II collagen and aggrecan gene expression were not significantly different from the control group. Our results suggest that magnetomechanical stimulation studies using magnetic nanoparticles should not only focus on the mechanical aspects, but also the interaction of magnetic nanoparticles with intracellular machinery should be investigated as well.
0

386
394


Hanie
Kavand
Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
Iran
kavand_hanie@ut.ac.ir


Mahdi
Rahaie
Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
Iran
mrahaie@ut.ac.ir


Nooshin
Haghighipour
National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
Iran
haghighipour@pasteur.ac.ir


Shahin
Bonakdar
National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
Iran
sh_bonakdar@pasteur.ac.ir


Javad
Koohsorkhi
Advanced Micro and Nano Devices Lab, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
Iran
koohsorkhi@ut.ac.ir
Mechanotransduction
Magnetic nanoparticles, Magnetic field, Mechanical actuation, Chondrogenesis
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Dell’Accio, “Culture expansion in lowglucose conditions preserves chondrocyte differentiation and enhances their subsequent capacity to form cartilage tissue in threedimensional culture,” BioResearch open access, vol. 3, no. 1, pp. 9–18, 2014.##[6] A. I. Caplan, “Mesenchymal stem cells,” Journal of orthopaedic research, vol. 9, no. 5, pp. 641–650, 1991.##[7] H. Koga, L. Engebretsen, J. E. Brinchmann, T. Muneta, and I. Sekiya, “Mesenchymal stem cellbased therapy for cartilage repair: a review,” Knee Surgery, Sports Traumatology, Arthroscopy, vol. 17, no. 11, pp. 1289–1297, 2009.##[8] A. O. Oseni, C. Crowley, M. Z. Boland, P. E. Butler, and A. M. Seifalian, “Cartilage tissue engineering: the application of nanomaterials and stem cell technology,” in Tissue engineering for tissue and organ regeneration, InTech, 2011.##[9] N. Fahy, M. Alini, and M. J. Stoddart, “Mechanical stimulation of mesenchymal stem cells: Implications for cartilage tissue engineering,” Journal of Orthopaedic Research®, vol. 36, no. 1, pp. 52–63, 2018.##[10] L. A. McMahon, F. J. O’Brien, and P. J. Prendergast, “Biomechanics and mechanobiology in osteochondral tissues,” 2008.##[11] C. Vinatier, D. Mrugala, C. Jorgensen, J. Guicheux, and D. Noël, “Cartilage engineering: a crucial combination of cells, biomaterials and biofactors,” Trends in biotechnology, vol. 27, no. 5, pp. 307–314, 2009.##[12] G. Musumeci, “The effect of mechanical loading on articular cartilage.” Multidisciplinary Digital Publishing Institute, 2016.##[13] J. SanchezAdams, H. A. Leddy, A. L. McNulty, C. J. O’Conor, and F. Guilak, “The mechanobiology of articular cartilage: bearing the burden of osteoarthritis,” Current rheumatology reports, vol. 16, no. 10, pp. 451, 2014.##[14] S. J. MillwardSadler and D. M. Salter, “Integrindependent signal cascades in chondrocyte mechanotransduction,” Annals of biomedical engineering, vol. 32, no. 3, pp. 435–446, 2004.##[15] A. N. Gasparski and K. A. Beningo, “Mechanoreception at the cell membrane: more than the integrins,” Archives of biochemistry and biophysics, vol. 586, pp. 20–26, 2015.##[16] R. F. Loeser, “Integrins and chondrocyte–matrix interactions in articular cartilage,” Matrix Biology, vol. 39, pp. 11–16, 2014.##[17] P. RocaCusachs, T. Iskratsch, and M. P. Sheetz, “Finding the weakest link–exploring integrinmediated mechanical molecular pathways,” J Cell Sci, vol. 125, no. 13, pp. 3025–3038, 2012.##[18] J. Cores, T. G. Caranasos, and K. Cheng, “Magnetically Targeted Stem Cell Delivery for Regenerative Medicine,” Journal of functional biomaterials, vol. 6, no. 3, pp. 526–546, 2015.##[19] Y. Gao, J. Lim, S.H. Teoh, and C. Xu, “Emerging translational research on magnetic nanoparticles for regenerative medicine,” Chemical Society reviews, vol. 44, no. 17, pp. 6306–6329, 2015.##[20] H.C. Kim, E. Kim, S. W. Jeong, T.L. Ha, S.I. Park, S. G. Lee, S. J. Lee, and S. W. Lee, “Magnetic nanoparticleconjugated polymeric micelles for combined hyperthermia and chemotherapy,” Nanoscale, vol. 7, no. 39, pp. 16470–16480, 2015.##[21] M. H. Cho, E. J. Lee, M. Son, J.H. Lee, D. Yoo, J. Kim, S. W. Park, J.S. Shin, and J. Cheon, “A magnetic switch for the control of cell death signalling in in vitro and in vivo systems,” Nature materials, vol. 11, no. 12, p. 1038, 2012.##[22] J. W. M. Bulte, T. Douglas, B. Witwer, S.C. Zhang, E. Strable, B. K. Lewis, H. Zywicke, B. Miller, P. van Gelderen, and B. M. Moskowitz, “Magnetodendrimers allow endosomal magnetic labeling and in vivo tracking of stem cells,” Nature biotechnology, vol. 19, no. 12, p. 1141, 2001.##[23] J. M. Kanczler, H. S. Sura, J. Magnay, D. Green, R. O. C. Oreffo, J. P. Dobson, and A. J. El Haj, “Controlled differentiation of human bone marrow stromal cells using magnetic nanoparticle technology,” Tissue Engineering Part A, vol. 16, no. 10, pp. 3241–3250, 2010.##[24] C. Monzel, C. Vicario, J. Piehler, M. Coppey, and M. Dahan, “Magnetic control of cellular processes using biofunctional nanoparticles,” Chemical science, vol. 8, no. 11, pp. 7330–7338, 2017.##[25] J. R. Henstock, M. Rotherham, H. Rashidi, K. M. Shakesheff, and A. J. El Haj, “Remotely Activated Mechanotransduction via Magnetic Nanoparticles Promotes Mineralization Synergistically With Bone Morphogenetic Protein 2: Applications for Injectable Cell Therapy,” Stem cells translational medicine, p. sctm2014, 2014.##[26] A. D. Dikina, B. P. Lai, M. Cao, M. Zborowski, and E. Alsberg, “Magnetic field application or mechanical stimulation via magnetic microparticles does not enhance chondrogenesis in mesenchymal stem cell sheets,” Biomaterials science, vol. 5, no. 7, pp. 1241–1245, 2017.##[27] S. H. Cartmell, J. Dobson, S. B. Verschueren, and A. J. El Haj, “Development of magnetic particle techniques for longterm culture of bone cells with intermittent mechanical activation,” IEEE Transactions on NanoBioscience, vol. 99, no. 2, pp. 92–97, 2002.##[28] S. Hughes, J. Dobson, and A. J. El Haj, “Magnetic targeting of mechanosensors in bone cells for tissue engineering applications,” Journal of biomechanics, vol. 40, pp. S96–S104, 2007.##[29] B. Son, H. D. Kim, M. Kim, J. A. Kim, J. Lee, H. Shin, N. S. Hwang, and T. H. Park, “Physical Stimuli‐Induced Chondrogenic Differentiation of Mesenchymal Stem Cells Using Magnetic Nanoparticles,” Advanced healthcare materials, vol. 4, no. 9, pp. 1339–1347, 2015.##[30] L. Li, K. Y. Mak, J. Shi, C. H. Leung, C. M. Wong, C. W. Leung, C. S. K. Mak, K. Y. Chan, N. M. M. Chan, and E. X. Wu, “Sterilization on dextrancoated iron oxide nanoparticles: Effects of autoclaving, filtration, UV irradiation, and ethanol treatment,” Microelectronic engineering, vol. 111, pp. 310–313, 2013.##[31] B. Johnstone, T. M. Hering, A. I. Caplan, V. M. Goldberg, and J. U. Yoo, “< i> In Vitro Chondrogenesis of Bone MarrowDerived Mesenchymal Progenitor Cells,” Experimental cell research, vol. 238, no. 1, pp. 265–272, 1998.##[32] W. Wang, B. Li, J. Yang, L. Xin, Y. Li, H. Yin, Y. Qi, Y. Jiang, H. Ouyang, and C. Gao, “The restoration of fullthickness cartilage defects with BMSCs and TGFbeta 1 loaded PLGA/fibrin gel constructs,” Biomaterials, vol. 31, no. 34, pp. 8964–8973, 2010.##[33] T. D. Schmittgen and K. J. Livak, “Analyzing realtime PCR data by the comparative C T method,” Nature protocols, vol. 3, no. 6, p. 1101, 2008.##[34] G. Yuan, Y. Yuan, K. Xu, and Q. Luo, “Biocompatible PEGylated Fe3O4 nanoparticles as photothermal agents for nearinfrared light modulated cancer therapy,” International journal of molecular sciences, vol. 15, no. 10, pp. 18776–18788, 2014.##[35] M. Jackson, P. H. Watson, W. C. Halliday, and H. H. Mantsch, “Beware of connective tissue proteins: assignment and implications of collagen absorptions in infrared spectra of human tissues,” Biochimica et Biophysica Acta (BBA)Molecular Basis of Disease, vol. 1270, no. 1, pp. 1–6, 1995.##[36] J. Lima, A. I. Gonçalves, M. T. Rodrigues, R. L. Reis, and M. E. Gomes, “The effect of magnetic stimulation on the osteogenic and chondrogenic differentiation of human stem cells derived from the adipose tissue (hASCs),” Journal of Magnetism and Magnetic Materials, vol. 393, pp. 526–536, 2015.##[37] J. L. Alonso and W. H. Goldmann, “Cellular mechanotransduction,” transport, vol. 1, p. 7, 2016.##[38] B. C. Low, C. Q. Pan, G. V Shivashankar, A. Bershadsky, M. Sudol, and M. Sheetz, “YAP/TAZ as mechanosensors and mechanotransducers in regulating organ size and tumor growth,” FEBS letters, vol. 588, no. 16, pp. 2663–2670, 2014.##[39] M. Glogauer, P. Arora, G. Yao, I. Sokholov, J. Ferrier, and C. A. McCulloch, “Calcium ions and tyrosine phosphorylation interact coordinately with actin to regulate cytoprotective responses to stretching,” Journal of Cell Science, vol. 110, no. 1, pp. 11–21, 1997.##[40] M. Glogauer, J. Ferrier, and C. A. McCulloch, “Magnetic fields applied to collagencoated ferric oxide beads induce stretchactivated Ca2+ flux in fibroblasts,” American Journal of PhysiologyCell Physiology, vol. 269, no. 5, pp. C1093–C1104, 1995.##[41] N. J. Sniadecki, “Minireview: a tiny touch: activation of cell signaling pathways with magnetic nanoparticles,” Endocrinology, vol. 151, no. 2, pp. 451–457, 2010.##[42] K. K. Sethi, V. Mudera, R. Sutterlin, W. Baschong, and R. A. Brown, “Contraction‐mediated pinocytosis of RGD‐peptide by dermal fibroblasts: Inhibition of matrix attachment blocks contraction and disrupts microfilament organisation,” Cytoskeleton, vol. 52, no. 4, pp. 231–241, 2002.##[43] S. Seetharaman and S. Etienne‐Manneville, “Integrin diversity brings specificity in mechanotransduction,” Biology of the Cell, vol. 110, no. 3, pp. 49–64, 2018.##[44] D. Fayol, N. Luciani, L. Lartigue, F. Gazeau, and C. Wilhelm, “Managing magnetic nanoparticle aggregation and cellular uptake: a precondition for efficient stem‐cell differentiation and MRI tracking,” Advanced healthcare materials, vol. 2, no. 2, pp. 313–325, 2013.##[45] Y. Chang, Y. Liu, J. H. Ho, S. Hsu, and O. K. Lee, “Amine‐surface‐modified superparamagnetic iron oxide nanoparticles interfere with differentiation of human mesenchymal stem cells,” Journal of Orthopaedic Research, vol. 30, no. 9, pp. 1499–1506, 2012.##[46] J.Y. Su, S.H. Chen, Y.P. Chen, and W.C. Chen, “Evaluation of Magnetic NanoparticleLabeled Chondrocytes Cultivated on a Type II Collagen–Chitosan/Poly (LacticcoGlycolic) Acid Biphasic Scaffold,” International journal of molecular sciences, vol. 18, no. 1, p. 87, 2017.##[47] E. Lucchinetti, M. M. Bhargava, and P. A. Torzilli, “The effect of mechanical load on integrin subunits α5 and β1 in chondrocytes from mature and immature cartilage explants,” Cell and tissue research, vol. 315, no. 3, pp. 385–391, 2004.##[48] T. Kurakawa, K. Kakutani, Y. Morita, Y. Kato, T. Yurube, H. Hirata, S. Miyazaki, Y. Terashima, K. Maeno, and T. Takada, “Functional impact of integrin α5β1 on the homeostasis of intervertebral discs: a study of mechanotransduction pathways using a novel dynamic loading organ culture system,” The Spine Journal, vol. 15, no. 3, pp. 417–426, 2015.##[49] C. Huang, Y. Charles, K. L. Hagar, L. E. Frost, Y. Sun, and H. S. Cheung, “Effects of cyclic compressive loading on chondrogenesis of rabbit bone‐marrow derived mesenchymal stem cells,” Stem cells, vol. 22, no. 3, pp. 313–323, 2004.##[50] I. Takahashi, G. H. Nuckolls, K. Takahashi, O. Tanaka, I. Semba, R. Dashner, L. Shum, and H. C. Slavkin, “Compressive force promotes sox9, type II collagen and aggrecan and inhibits IL1beta expression resulting in chondrogenesis in mouse embryonic limb bud mesenchymal cells,” Journal of cell science, vol. 111, no. 14, pp. 2067–2076, 1998.##[51] J. F. Schenck, “The role of magnetic susceptibility in magnetic resonance imaging: MRI magnetic compatibility of the first and second kinds,” Medical physics, vol. 23, no. 6, pp. 815–850, 1996.##[52] H. D. Amin, M. A. Brady, J.P. StPierre, M. M. Stevens, D. R. Overby, and C. R. Ethier, “Stimulation of Chondrogenic Differentiation of Adult Human Bone MarrowDerived Stromal Cells by a ModerateStrength Static Magnetic Field,” Tissue Engineering Part A, 2014.##[53] K. Andreas, R. Georgieva, M. Ladwig, S. Mueller, M. Notter, M. Sittinger, and J. Ringe, “Highly efficient magnetic stem cell labeling with citratecoated superparamagnetic iron oxide nanoparticles for MRI tracking,” Biomaterials, vol. 33, no. 18, pp. 4515–4525, 2012.##]
1

MagnetoThermo mechanical vibration analysis of FG nanoplate embedded on Visco Pasternak foundation
https://jcamech.ut.ac.ir/article_69009.html
10.22059/jcamech.2018.261764.300
1
Article history:Received: 12 July 2018 Accepted: 1 September 2018 Available online In this paper, the mechanical vibration analysis of functionally graded (FG) nanoplate embedded in visco Pasternak foundation incorporating magnet and thermal effects is investigated. It is supposed that a uniform radial magnetic field acts on the top surface of the plate and the magnetic permeability coefficient of the plate along its thickness are assumed to vary according to the volume distribution function. The effect of inplane preload, viscoelastic foundation, magnetic field and temperature change is studied on the vibration frequencies of functionally graded annular and circular nanoplate. Two different size dependent theories also are employed to obtain the vibration frequencies of the FG circular and annular nanoplate. It is assumed that a powerlaw model is adopted to describe the variation of functionally graded (FG) material properties. The FG circular and annular nanoplate is coupled by an enclosing viscoelastic medium which is simulated as a visco Pasternak foundation. The governing equation is derived for FG circular and annular nanoplate using the modified strain gradient theory (MSGT) and the modified couple stress theory (MCST). The differential quadrature method (DQM) and the Galerkin method (GM) are utilized to solve the governing equation to obtain the frequency vibration of FG circular and annular nanoplate. Subsequently, the results are compared with valid results reported in the literature. The effects of the size dependent, the inplane preload, the temperature change, the magnetic field, the power index parameter, the elastic medium and the boundary conditions on the natural frequencies are scrutinized. According to the results, the application of radial magnetic field to the top surface of plate gives rise to change the state of stresses in both tangential and radial direction as well as the natural frequency. Also, The temperature changes play significant role in the mechanical analysis of FG annular and circular nanoplate. This study can be useful to product the sensors and devices at the nanoscale with considering the thermally and magnetically vibration properties of the nanoplate.
0

395
407


Abbas
Moradi
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
a.moradi64@gmail.com


Amin
Yaghootian
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
a.yaghootian@scu.ac.ir


Mehdi
Jalalvand
Department of Mathematics and Computer Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
jalalvand.m@scu.ac.ir


Afshin
Ghanbarzadeh
Department of Mechanical Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
ghanbarzadeh.a@scu.ac.ir
Circular and annular nanoplate
Functional graded nanoplate
Modified strain gradient theory
Modified couple stress theory
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1

Modified mathematical model for variable fill fluid coupling
https://jcamech.ut.ac.ir/article_69047.html
10.22059/jcamech.2018.251741.238
1
Variable fill fluid couplings are used in the speed control units. Also, variation in coupling oil volume is used in adapting one size of coupling to a wider range of power transmission applications. Available model for the partially filled fluid couplings, has a good performance for couplings with fixed amount of oil but their performance will be degraded if they are used for the variable fill couplings. In this paper, the current model for partially filled fluid couplings is modified to have better performance for variable fill couplings. For this purpose, the circulation loss calculation is modified and also, the effect of oil temperature variations and blade thickness are included in the model. The effect of these modification on the model performance are investigated in couple of simulations. Comparing the simulation results with the available experimental data shows that the suggested modifications can improve the model performance very well.
0

408
414


Saeed
Bahrami
Department of Mechanical Engineering, Faculty of Mechatronic, Islamic Azad University, Karaj Branch, Karaj, Iran
Iran
saeed.bahrami@gmail.com


Ali
Keymasi Khalaji
Department of Mechanical Engineering, Faculty of Engineering, Kharazmi University, Tehran, Iran
Iran
keymasi@khu.ac.ir
Fluid coupling
Mathematical Modeling
Power transmission
Variable fill coupling
Turbomachinery
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1

A review on stress distribution, strength and failure of bolted composite joints
https://jcamech.ut.ac.ir/article_69010.html
10.22059/jcamech.2018.269612.342
1
In this study, analytical models considering different material and geometry for both single and doublelap bolted joints were reviewed for better understand how to select the proper model for a particular application. The survey indicades that the analytic models selected for the adhesively single or double bolted lap joints, as well as T, scarf, and stepped joints, with linear material properties are mostly two dimensional and the studies on stress distribution and/or failure of the joint are performed either experimentally, analytically or by finite element method. The results seem to be generally accurate and adequate. Additionally, it was shown that any increase in the bolthole clearance leads to an increase in bolt rotation, as well as a decrease in bolthole contact area, and hence, a reduction in joint stiffness. Moreover, studies on hybrid joints have revealed that the proper choice of adhesive material in conjunction with bolts or rivets in a joint, allows for significant increase in the static and fatigue strength compared to similar pure bonded joints. Additionally, the results on hybrid scarf joints showed that it is vital to place fasteners closer to the ends of the overlap to suppress the peak peeling stresses and hence, delay the effects of early crack initiation in the adhesive layer...
0

415
429


Mohammad
Shishesaz
Department of Mechanical engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
mshishehsaz@scu.ac.ir


Mohammad
Hosseini
Department of Mechanical engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Iran
s.m.hssini@gmail.com
Plated bolted joints
Nonlinear Behavior
design
fatigue strength and failure
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