Crack strain-gradient-related

Fig. 12.5 A Ga0.95ln0.05Sb wafer showing strain-gradient-related cracks.

Using these formulas, the slip gradient can be related to the aspects of the displacement profile. For example, Fig. 6 compares the vertical displacement profile from a shallow imbedded crack to an equivalent dislocation. Crack models avoid the strong fault-tip singularities associated with dislocation models and the associated effects on the seafloor displacement field. The strain singularity at the edge of the dislocation manifests as a short-wavelength spike in the displacement as shown in Fig. 4. Conversely, the concentration of slip in the middle of a crack... 

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