Abstract
A three-dimensional eight-node hybrid stress finite element method is developed for the analysis of laminated plates. The hybrid stress model is based on the modified complementary energy principle and takes into account the transverse shear deformation effects. The displacement field is interpolated through shape functions and nodal displacements. All three displacement components are assumed to vary linearly through the thickness of each lamina. All six stresses are included and satisfy the equations of motion. Numerical results for the fundamental frequencies of cross-ply laminates are presented as functions of plate geometry ( a h ) degree of anisotropy ( E L E T ) and number of plies. They are also compared with numerical values obtained from the elasticity solution, the modified shear deformation theory and the classical lamination theory.
Published Version
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