It is found that presence of delamination leads to substantial reduction in the load carrying capacity of the composite plate. Numerical results are presented to provide an insight into effects of delamination type, size of delamination and boundary condition on the critical buckling temperature difference, buckling mode and postbuckling behavior of the composite plate. The proposed model is capable of analyzing both local buckling of the de-laminated base laminate and sublaminate as well as the global buckling of the plate. For modeling the embedded and through-the-width delaminations, the plate is divided into a number of smaller regions. ![]() The nonlinear equilibrium equations derived by the minimum total potential energy principle, are solved using the Rayleigh–Ritz method along with the Newton–Raphson iterative procedure. The thermomechanical properties of the laminates are assumed to be temperature dependent. The formulation is established within the framework of the higher order shear deformation theory by taking into account the von Karman geometrical nonlinearity. This paper deals with the nonlinear thermal stability of composite plate with embedded and through-the-width delaminations under uniform temperature rise.
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