Figure 2: Variation along the bond edge of the function F defined in (3) for k = 2. The peak value, Fp, gives via (5) the bond strength and the location, Θc, along the bond edge for initial crack propagation. Figure 3: Variation along the bond edge of the function F in the case k = 1. k = 2. Furthermore, as the plate dimensions are decreased the most critical location along the crack front, Θc, decreases from 180 o to 148o for α = 1.5. For k = 2 the critical angle increases as the plate dimensions increase relative to the bond diameter from 115o when α = 8 to 135o when α = 1.5.
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