A plane problem for a periodically layered bimaterial composite with an interface crack is considered. After deriving the closed form analytic expression of the Green function for the point dislocation in a layered media the problem is solved by means of singular integral equations. It is found that similar to a previously considered case of antiplane deformation, increasing the stiffness of the thinner layers may lead either to increasing or to decreasing of the absolute value of the stress intensity factor. As a result, it can exceed appreciably the corresponding value for the crack in a homogeneous material. On the other hand, compared to the sandwich composite this effect is found to be limited.
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