Abstract
We study the elastic interaction between a semi-infinite debonded anticrack lying on the negative real axis and a screw dislocation under the assumption of anti-plane mechanical loading. The lower side of the anticrack (or rigid line inclusion) is perfectly bonded to the surrounding material in contrast to its upper side which is fully debonded. A simple closed-form solution to this interaction problem is developed by means of conformal mapping and the method of images. Specifically, we obtain expressions for the image force acting on the screw dislocation, the two resultant stress intensity factors respectively characterizing the r−3/4 and r−1/4 type singularities at the tip of the debonded anticrack and the resultant material force on the debonded anticrack. The dislocation emission criterion from the debonded anticrack in terms of two critical stress intensity factors is also established.
Published Version
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