Abstract
The elastoplastic behavior of an interface crack under transient load is investigated. The materials are assumed to be elastic—perfectly plastic and Dugdale's model is used to describe the plastic deformation near the interface crack tips. Then the governing equations in the form of integral equation, which can describe the moving boundary between elastic and plastic regions are formulated. Numerical results for crack tip opening and slipping displacements and the length of the plastic region are obtained by solving the above equations. The results obtained indicate that, for an interface crack, the slipping displacement at the crack tip has significant effect on the failure of the crack.
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