Figure 1.
The geometry considered in this paper. A stiff film of thickness h and elastic constants Ef and νf is supported on a compliant substrate of thickness H and elastic constants Es and νs. There is a uniform crack array of deptha and spacing W. a) The two-dimesnional geometry, appropriate for cracks propagating perpendicular to the interface and into the substrate. b) The configuration for crack channeling (propagation parallel to the interface).