Hygrothermally Induced Postbuckling Response ...

In the present study, post buckling response of hygrothermally induced non-linear elastically supported laminated composite plate with uncertain system properties using stochastic finite element macromechanical model approach is investigated. Uncertain system properties such as thermal expansion coefficients, hygroscopic expansion coefficients, foundation stiffness parameters, geometric properties and lamina material properties are modeled as basic random variables. The basic formulation is based on a higher-order shear deformation plate theory in von Karman nonlinear kinematics. A direct iterative based C0 non linear finite in conjunction with Taylor series based mean-centered first order regular perturbation technique be used to obtain mean and standard deviation of post buckling load of laminated composite plates. The effects of rising temperature, degree of moisture concentrations, boundary conditions, plate aspect ratios, total number of plies, nonlinear elastic foundation stiffness parameters and fiber orientations are analysed. The approach has been validated by comparison of results with availability in literature and independent Monte Carlo simulation.