Buckling analysis of laminated composite plates compressed in two perpendicular directions with out-of-plane shear deformation
Ni Qing Qing
Abstract:The buckling analysis of laminated composite plates compressed in two perpendicular directions is presented by using the pb-2 Ritz functions, which consist of the product of a basic function and a two dimensional polynomial function. The out-plane shear deformation is also taken into consideration in this analysis. It is shown that the convergence of solutions for the buckling load is good when the number of polynomials is more than 20. Numerical results are obtained for cross-ply and angle-ply laminated composite plates compressed in two perpendicular directions. The effects of material properties, plate aspect ratio, number of layers and lamination angle on buckling load are also investigated under simple supported, clamped edges and combined edge conditions. It is shown that the presented method considering the out-of-plane shear deformation can be widely used to analyze the buckling behavior of composite plates with general boundary conditions. Key Words:buckling load, shear deformation, composites, polynomials, laminates, Ritz function