Pages 185-186
A behavior of a wing crack growth near an interface of bonded materials is studied. The wing crack is a mode-I failure that emanates from the closed crack tip under compression. It was found that the wing crack becomes easier to grow when it propagates near a free boundary where a considerable outward deflection appearing on the boundary seems to assist the extension of wing crack. Different from the tensile crack, the wing crack shows no tendency to approach the free boundary and rather propagates almost parallel to a free edge.
