BEM Implementation of the Energy Domain Integral for the Solution of Three-Dimensional Interface Cracks in Transversely Isotropic Bimaterials

N.O. LARROSA; A.P. CISILINO; J. ORTIZ

Foz do Iguacu

Congreso; XI Pan-American Congress of Applied Mechanics; 2010

Universidad de Sao Paulo, Brasil

Abstract. The overall mechanical properties of composite materials depend heavily on the nature of the bond at bimaterial interfaces. Interfacial delamination and fracture are commonly observed problems that may ultimately limit the use of these materials. A general numerical tool for the analysis of three-dimensional transversely isotropic bimaterial interface cracks is presented in this paper. The proposed tool is based on a multidomain formulation of the Boundary Element Method (BEM) with the crack located at the interface. J-integral is computed along the threedimensional crack fronts using the Energy Domain Integral (EDI) methodology. The implementation takes advantage of the efficiency of the boundary integral equation to directly obtain the required displacement derivatives, stress and strain fields from their boundary integral representations. The capability of the procedure is demonstrated by solving an example.