Stability of Multilayer Sandwich Plates

by Julius P. Wong,
Ahmed E. Salama,

Serial Information: Journal of the Engineering Mechanics Division, 1967, Vol. 93, Issue 3, Pg. 19-32

Document Type: Journal Paper


A variational method of elasticity is applied to the stability of multilayer sandwich plates consisting of isotropic homogeneous membrane facing layers and orthotropic homogeneous core layers. Both facing and core layers may have different thicknesses and elastic properties. The theory accounts for shear deformation. A weighted neutral surface is defined and is found to simplify the governing differential equation considerably. A set of five nonlinear differential equations governing the plate stability is obtained. When Poisson's ratios are equal, the governing equation is a partial differential equation of the sixth order. For isotropic core layers, the governing equation becomes of the fourth order. Results are compared with previous investigations and examples are solved.

Subject Headings: Differential equations | Sandwich panels | Elastic analysis | Isotropy | Homogeneity | Shear deformation | Membranes | Orthotropic materials

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