Modelling Delamination in Layered Anisotropic Material Structures

A quasi-static model for numerical solution of damage in layered anisotropic material structures has been developed. It invokes a cohesive type response of the interface interpreted as a thin layer of an adhesive. In the model, various types of layered materials can be proposed by using any type of anisotropic materials of the layers with different mechanical properties. The analysis calculates stress and strain quantities in the structure and at the damaged interface. The proposed mathematical approach is based on an energetic formulation looking for a kind of weak solution. The solution is approximated by a time stepping procedure, the Symmetric Galerkin Boundary Element Method (SGBEM), and it utilizes nonlinear programming algorithms.