The effect of moisture concentration and the thermal gradient on the freeflexural vibration and buckling of laminated composite plates are investigated.The effect of a centrally located cutout on the global response is alsostudied. The analysis is carried out within the framework of the extendedfinite element method. A Heaviside function is used to capture the jump in thedisplacement and an enriched shear flexible 4-noded quadrilateral element isused for the spatial discretization. The formulation takes into account thetransverse shear deformation and accounts for the lamina material properties atelevated moisture concentrations and temperature. The influence of the plategeometry, the geometry of the cutout, the moisture concentration, the thermalgradient and the boundary conditions on the free flexural vibration isnumerically studied.
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