ABSTRACT
The J-Integral is sensitive for nonlinear and multiaxial stress states. It can be used as a physical based failure predictor. This work presents the development of a RVE procedure and a FEM cell with an optimized mesh for high deformations to calculate the J-Integral for the whole range of multiaxial stress states and crack orientations. Based on this data, an empirical fitting equation is provided to estimate and to map the J-Integral in the post processing step of a FEM simulation. The equation is implemented as a simple subroutine in Abaqus to spot critical locations in different test specimens. Theses examples show that the J-Integral gives an adequate failure predictor and combines strain and hydrostatic stress load cases for rubber like materials.
