Abstract
Using conformal mapping and the image method, we derive an analytic solution to the problem of an isotropic elastic bimaterial involving a screw dislocation interacting with a semi-infinite interface crack, a semi-infinite crack in the upper half-plane perpendicular to the interface, and another semi-infinite crack in the lower half-plane also perpendicular to the interface. Closed-form expressions of the image force acting on the screw dislocation and the mode III stress intensity factors at the three crack tips are derived.
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