Cracks and screw dislocation arrays in anisotropie bimaterial plates

This article examines the equilibrium configuration of dislocation arrays in anisotropic bimaterial plates. Both components in the plate are assumed to be orthotropic with respect to plate axes. Forces on dislocations due to external loadings are found in closed form.Image forces due to phase boundary and free surfaces are also taken into consideration.Discussions on the behavior of screw dislocation arrays can be easily extended to the behavior of antiplane shear cracks. The crack opening displacements for several biomaterial systems have been calculated. In these systems, the crack opening displacements are found to be insensitive to the variation of plate thickness. However, they are strongly affected by the relative magnitude of elastic constants of the component phases. This is demonstrated in several diagrams.