Stress and Displacement Fields for Propagating the Crack Along the Interface of Dissimilar Orthotropic Materials Under Dynamic Mode I and II Load

General stress and displacement fields are derived as a crack steadily propagates along the interface of dissimilar orthotropic materials under a dynamic mode I and II load. They are obtained from the complex function formulation of steady plane motion problems for an orthotropic material and the complex eigenexpansion function. After the relationship between stress intensity factors and stress components for a propagating crack is defined, the stress, displacement components, and energy release rate with stress intensity factors are derived. The results are useful for both dissimilar isotropic and orthotropic and isotropic-orthotropic bimaterials, and homogeneous isotropic and orthotropic materials under subsonic crack propagation velocity. [S0021-8936(00)00601-2]