Abstract
Cracks of kinked, or “zig-zag” shapes (that are common in brittle materials, particularly in polycrystalline ones) consisting of two rectilinear links are considered. Their compliances, as well as stress intensity factors, are examined using a simple and reasonably accurate procedure that is based on approximating the original configuration by rectilinear cracks separated by a very small ligament. Full stress fields and their far-field asymptotics are also examined.
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