Stress Intensity Factors for the Interface Crack between Dissimilar Orthotropic Materials

A correct form of the definition of the stress intensity factors is presented for an interface crack between dissimilar orthotropic materials, and the extrapolation methods to determine the stress intensity factors by numerical results are proposed. From some numerical results, it is confirmed that the definition is vallid and the extrapolation methods are very efficient. This study also investigates the stress distribution on the interface between dissimilar orthotropic materials. It is found that there exists a good pair for dissimilar orthotropic materials, in which the stress singularity disappears at the edge of the interface.