Abstract
The minimum stress design of thick laminated sandwich plates is given based on a higher-order theory of plates which includes the effects of the normal and shear deformation. The surface layers are made of a transversely isotropic composite material and the results are given for isotropic and transversely isotropic core layers which can model a variety of materials including honcycomb. The theory is implemented using dedicated symbolic computation routines developed in the C programming language. The analysis is incorporated into an optimization algorithm to determine the optimal thicknesses of the surface layers for the minimum stress deisgn of three-layered sandwich plates. Numerical results are given for plates under sinusoidal loading and the effects of various input parameters are investigated. The stress behaviour which cannot be studied using a classical theory or a shear deformable theory only is indicated.
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