University of Tehran Press Journal of Computational Applied Mechanics 2423-6713 55 4 2024 10 01 An investigation into the numerical analysis of refined higher order shear deformation theory for frequency responses of two-directional functionally graded taper beams 605 616 96924 10.22059/jcamech.2024.374727.1029 EN G. Chandra Mohana Reddy Department of Mechanical Engineering, MLR Institute of Technology, Hyderabad, India Ch Ravikiran Department of Mechanical Engineering, MLR Institute of Technology, Hyderabad, India S Nagaraju Department of Mechanical Engineering, MLR Institute of Technology, Hyderabad, India P Bridjesh Department of Chemical & Materials Engineering, College of Science, Engineering and Technology, University of South Africa (UNISA), c/o Christiaan de Wet & Pioneer Avenue, Florida Campus 1710, Johannesburg, South Africa. Journal Article 2024 04 05 For the aircraft and space shuttles to have the right properties, they need new engineering materials. Changing the qualities of the material in more than one direction is one way to do this. These features should be seen in in-plane, bi-directional functionally graded materials. This study examines the vibration behavior of a two-directional functionally graded taper beam (TDFGTB) with uniform load distribution. The analysis uses a refined higher-order shear deformation theory, Lagrange equations, and the displacement functions are formulated in simple algebraic polynomials incorporating admissible functions to satisfy the boundary conditions in both directions with the help of a Ritz-type solution. The components of admissible functions are derived from Pascal’s triangle. The study also examines the influence of taper ratios, aspect ratios, and gradation exponents on the vibration response. The results provide a benchmark for assessing beam theories and are crucial for optimizing the design of TDFGTBs. https://jcamech.ut.ac.ir/article_96924_a17d976a306ce79e47913eee8e8cd79d.pdf