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Abstract
A new high-order laminated plate thermoelastic responses theory, which is based on a new mixed variational principle proposed by Reissner (1984) and accounts for transverse shear and transverse normal strains, is developed to study the thermoelastic behavior of a laminated composite plate. To this end, a zig-zag-shaped Co function and Legendre polynomials are introduced into the approximate displacement distributions across the plate thickness. The thickness variation of temperature is considered to be linear. The theory is examined by applying it to the thermal bending problem of cross-ply rectangular plates. The numerical results of central deflection and thickness variation of in-plane and transverse thermal stresses are obtained for symmetric and antisymmetric cross-ply plates.