DAMAGE ANALYSIS METHOD FOR LAMINATES BASED ON PERIDYNAMIC THEORY

A new method for progressive damage analysis of fiber-reinforced composite laminates based on peridynamic theory was proposed. The basic parameters, micromodulus and critical stretch for peridynamic modeling were deduced based on elasticity and composite mechanics. The concept of off-axial modulus was introduced into the bonds' definition to establish a pairwise force function for anisotropic materials. This approach was able to analyze three types of damages: fiber fracture, matrix fracture and delaminations. Based on this approach, laminate with an open hole was subjected to a tensile load to simulate the progressive damage process. The predictions showed good agreements with experimental results.