Some Studies on the Flexural Responses of Perforated FGM Panels under Thermomechanical Loading

Abstract

Functionally graded materials (FGM), an advanced form of inhomogeneous composite materials, newlineexhibit tailor-made characteristics that are designed for high-temperature applications. The use of newlineperforated structures in various sectors, such as aerospace, automobile, defense, biomedical, etc., newlineis predominant due to lightweight and heat-dissipation characteristics. In the research work, a newlinenonlinear-flexural analysis of perforated functionally graded panels is performed under heat newlineconduction and uniform pressure. Different functionally graded composite flat/curved panels are newlinemodeled with fixed/randomly-oriented single/multiple arbitrary-shaped-rectangular, H-shaped, newlineT-shaped, L-shaped, and plus-shaped perforations. For this, the Green-Lagrange strain fields newlineobtained via the higher-order-shear-deformation (HSDT) mid-plane kinematics is to obtain the newlinenonlinear-mathematical model. The overall temperature-dependent thermal and elastic properties newlineof the metal/ceramic FGM are computed using a power-law function and Voigt s newlinehomogenization scheme. The equilibrium equations are obtained through the minimum potential newlineenergy principle via isoparametric finite-element-approximations that are finally solved by newlineadopting Picard s successive iteration technique. The convergence and validation studies are newlinecarried out by performing mesh-sensitivity analysis and comparison tests, respectively. This newlinework is classified based on the types of perforations on the different FGM flat/curved panels, newlinewhere, the linear/nonlinear flexural behavior is analysed at various sets of parametric newlinecombinations with different geometrical/material parameters, support-conditions, and their newlineimpacts are discussed. Based on the numerical computations, sets of material/geometric newlineboundary conditions are confirmed with severe nonlinearity. This present analysis would newlineadequately assist the design implementation of perforated FGM structures for any appropriate newlinereal-life problems.