Buckling Analysis of Delaminated Rectangular Composite Laminates Under In-Plane Shear Load

摘要

The buckling load of composite laminates may reduce considerably because of the presence of delaminations. This paper examines this effect when the laminate is under in-plane shear load. A rectangular composite laminate with a single or multiple embedded delaminations is considered and a buckling analysis is performed using Mindlin plate elements in a finite element method. The buckling load and mode are obtained by solving an eigenproblem. The penalty function method is used to enforce constraints preventing overlap between sublaminates. Numerical results show the effects of the number, size and depth of delaminations and boundary conditions of the laminate on the buckling load.