- A finite-element formulation of equations governing layered anisotropic composite plates subjected to thermal and mechanical loadings is presented. An exact closed-form solution is also presented for simply supported rectangular cross-ply laminated plates under sinusoidal loading to validate the finite element developed. The finite-element results are in good agreement with the closed-form results and with the results of others. Material properties typical of advanced fiber-reinforced composites are used to show the parametric effects of plate aspect ratio, side-to-thickness ratio, orientation of layers, and edge conditions on the deflections and stresses. 1980 Taylor & Francis Group, LLC.