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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: J Mech Phys Solids. 2011 Sep;59(9):1927–1937. doi: 10.1016/j.jmps.2011.04.009

Figure 4.

Figure 4

The basic geometries of unit thickness used for the calculations in this paper. The substrate is of thickness H and the film is of thickness h. (a) An uncracked slice of material of width W from which uo(W) is calculated. (b) The same element with a crack of depth a in the middle, from which uc(a, W) is calculated. (c) A crack with an internal pressure, corresponding to the stress field in the uncracked configuration, from which uo(W) − uc(a, W) is calculated directly.