Advances in Materials Research, Vol. 5, No. 4 (2016) 205-221 DOI: https://doi.org/10.12989/amr.2016.5.4.205 205 Copyright © 2016 Techno-Press, Ltd. http://www.techno-press.org/?journal=amr&subpage=7 ISSN: 2234-0912 (Print), 2234-179X (Online) Thermal buckling behaviour of shear deformable functionally graded single/doubly curved shell panel with TD and TID properties Vishesh R. Kar 1a , Subrata K. Panda 2 and Trupti R. Mahapatra 3b 1 Department of Design and Automation, School of Mechanical Engineering, VIT University Vellore: 632014, India 2 Department of Mechanical Engineering, National Institute of Technology, Rourkela: 769008, India 3 School of Mechanical Engineering, KIIT University, Bhubaneswar: 751024, India (Received July 20, 2016, Revised November 28, 2016, Accepted November 30, 2016) Abstract. In this article, the buckling responses of functionally graded curved (spherical, cylindrical, hyperbolic and elliptical) shell panels under elevated temperature load are investigated numerically using finite element steps. The effective material properties of the functionally graded shell panel are evaluated using Voigt’s micromechanical model through the power-law distribution with and without temperature dependent properties. The mathematical model is developed using the higher-order shear deformation theory in conjunction with Green-Lagrange type nonlinear strain to consider large geometrical distortion under thermal load. The efficacy of the proposed model has been checked and the effects of various geometrical and material parameters on the buckling load are analysed in details. Keywords: FGM; thermal buckling; single/doubly curved panel; HSDT; ANSYS 1. Introduction Functionally graded material (FGM) is microscopically heterogeneous which is achieved through the gradation of two or more materials from one surface to another. The typical FGM constituents are metal/alloy and ceramic materials. The advantages of these materials, such as high fracture toughness in metal and high heat-resistant in ceramic, make FGM be the one of the promising material under severe environmental conditions. The structures made up of FGM are more significant in aerospace, defence, energy, etc. for thermal barrier applications. The FGM structures exposed to the high-temperature environment cause the instability in geometry. Therefore, it has become the necessity that the buckling behaviour of FGM structures under the thermal environment has to be analysed. In this regard, many studies on the stability of FGM structures like flat/curved panels are presented in past. Some of the contributions to the closed-form solutions of the buckling load parameter of the Corresponding author, Assistant Professor, E-mail: [email protected] a Assistant Professor, E-mail: [email protected] b Assistant Professor, E-mail: [email protected]
Thermal buckling behaviour of shear deformable functionally graded single/doubly curved shell panel with TD and TID properties
May 16, 2023
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