Evaluation of fracture parameters by equivalent domain integrals

In numerical analyses of cracked components often the finite element method is used in combination with special subroutines or post-processor programs for the evaluation of J-integral values. In this paper post-processor programs are described which use a volume integral formulation proposed by ATLURI and coworkers and denoted as equivalent domain integral (EDI). The programs use the results of two or three dimensional linear-elastic or elastic-plastic calculations with the finite element program ADINA. Besides the basic equations the numerical implementation is described. Also some results of test calculations on a compact tension shear specimen are presented. The results show a reasonable agreement with values gained by other methods.