Abstract
In the present chapter, a new improved higher-order theory is presented for wrinkling analysis of sandwich plates with soft orthotropic core. Third-order plate theory is used for face sheets and quadratic and cubic functions are assumed for transverse and in-plane displacements of the core, respectively. Continuity conditions for transverse shear stresses at the interfaces as well as the conditions of zero transverse shear stresses on the upper and lower surfaces of plate are satisfied. The nonlinear von Karman type relations are used to obtain strains. Also, transverse flexibility and transverse normal strain and stress of the orthotropic core are considered. An analytical solution for static analysis of simply supported sandwich plates under uniaxial in-plane compressive load is presented using Navier’s solution. The effect of geometrical parameters and material properties of face sheets and core are studied on the face wrinkling of sandwich plates. Comparison of the present results with those of plate theories confirms the accuracy of the proposed theory.
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