Interface Cracks
نویسنده
چکیده
-Properties of elastic solutions to interface crack problems are discussed in both the open formulation, in which the crack faces are assumed to be traction-free and interpenetration is permitted, and the unilateral formulation, where a contact zone is generally established adjacent to the crack tips. It is shown that if the contact zone is sufficiently small compared with the other dimensions in the problem, the unilateral solution can be approximated by embedding a universal contact field--characterized by two linear scaling parameters--within the surrounding asymptotic field of the open solution. Results for a plane crack are compared with analytical solutions due to Dundurs and Gautesen and the method is also used to predict the extent of the contact region for a penny-shaped interface crack in combined shear and tension.
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