Thermal buckling and postbuckling behavior is presented for fiber-reinforced laminated plates subjected to in-plane temperature variation and resting on an elastic foundation. Two kinds of fiber-reinforced laminated plates, namely, uniformly distributed and functionally graded reinforcements, are considered. The material properties of fiber-reinforced laminated plates are based on a micromechanical model and are assumed to be temperature dependent. The governing equations are based on a higher order shear deformation plate theory that includes plate–foundation interaction and the thermal effect. Numerical illustrations are carried out for fiber-reinforced polymer matrix and metal matrix composite laminated plates without or resting on elastic foundations. The numerical results show that the buckling temperature as well as thermal postbuckling strength of the plate can be increased as a result of functionally graded fiber reinforcements. The results reveal that the effect of functionally graded fiber reinforcements on the thermal buckling and postbuckling strength of the plate with polymer matrix is more pronounced compared to the plate with metal matrix.
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