Coupled loading hygro-thermo-mechanical Effect on the stability of imperfect functionally graded sandwich plates

Document Type : Research Paper


1 Department of Irrigation and Civil Engineering, Faculty of Technology, Echahid Hamma Lakhdar University, El Oued, 39000, Algeria

2 Material and Hydrology Laboratory, Civil Engineering Department, Faculty of Technology, Djillali Liabes University, Sidi Bel Abbes 22000, Algeria

3 Department of Civil Engineering, Faculty of Technology, University of Ferhat Abbas, Setif 19137, Algeria

4 Research Unit of Emerging Materials, University of Ferhat Abbas, Setif 19137, Algeria

5 Department of Civil Engineering, Faculty of Science and Technology, Abbes Laghrour University, Khenchela 40000, Algeria

6 Civil Engineering Department, College of Engineering, Jazan University, Saudi Arabia


In this research study, the hygro-thermo-mechanical responses of simply supported porous FG sandwich plates resting on a variable elastic foundation are studied by mean of a new height order shear deformation theory. The present model satisfies the nullity conditions of the shear stresses on the upper and lower surfaces of the FG plate and without using shear correction factors. The distribution of the properties of the material through the thickness of the sandwich plate is assumed to have a distribution according to a function of the power law, while the core is assumed to be purely ceramic. The derivation of the stability equations is obtained based on the principle of virtual works. The hygro-thermal loading is considered to have a uniform, linear and non-linear variation across the thickness of the plate. To verify the accuracy of the current model, a comparison was made with other authors of the literature. The effects of the hygro-thermo-mechanical loading, the porosity, the parameters of the elastic foundation « kw and kg », the thickness ratio « a/h », the aspect ratio « a/b » and the material index « k » on the critical buckling load of the FG plate are examined.


Main Subjects

Articles in Press, Accepted Manuscript
Available Online from 10 April 2024
  • Receive Date: 18 March 2024
  • Revise Date: 10 April 2024
  • Accept Date: 10 April 2024