Buckling analysis of symmetric laminated composite plates for various thickness ratios and modes

摘要

This paper addresses the refined plate theory considering the simplified form of governing differential equations used to solve buckling analysis of laminated composite plates. Such laminated composites are often used in structural applications with recent advancements in material technology. This led to the creation of a new composite with enhanced properties to sustain compressive in-plane loading. Under compressive loads and/or due to thin built-up, laminated composites may be prone to buckle. Hence, it attains attraction to study buckling characteristics of laminated composites and is required filed of research now days. Very few literatures are available on buckling characteristics of laminated composite plate with different boundary conditions. Hence, this study investigates buckling behaviors of laminated composite structures with a cross-ply lamination scheme of plates with such boundary conditions. In addiditon, parametric study is performed for isotropic and such cross ply laminated plates under buckling to study the effect of plate thickness ratios on buckling load. As aspect ratio of laminates gets doubled, buckling loads lower down by 36% for thin to moderately thick plates. As we go from thin to thick plate; buckling loads for laminated plates gets changed by 62% for which details are shown in results part of the present paper. In particular, new results reported in this paper are focused on the significant effects of the buckling for various parameters of laminates, such as boundary condition, aspect ratio, width-to-thickness ratio, and stacking sequences with various modes of buckling.