ENERGY-RELEASE RATE FOR A DYNAMICALLY GROWING CRACK AT THE INTERFACE OF DISSIMILAR ISOTROPIC MATERIALS

The strain energy release rate for a crack at the interface of dissimi lar isotropic materials was derived from an existing crack tip field. In the derivation, the J-integral along a special near tip contour was used. A single expression of the strain energy release rate correspon ding to different definitions of stress intensity factors was obtained . The validity of the general expression was discussed.