The mechanics of crack growth in layered materials

Layered materials comprised of one brittle and one ductile constituent exhibit crack growth characteristics that depend on the sequential renucleation of cracks in each brittle layer. An analysis of the problem is presented with two different interface responses. One for a well-bonded, slipping interface and the other for an interface that debonds. It is shown that either slip or debonding enhance the fracture resistance, with debonding being the more effective. The analysis is compared with experimental results for several layered systems.

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