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Although a lot of interface crack problems were previously treated, few solutions are available under arbitrary material combinations. This paper deals with an edge interface crack in bonded finite and semi-infinite plates under tension. Then, the effects of material combination on the stress intensity factors are discussed. A useful method to calculate the stress intensity factor of interface crack is presented with focusing on the stresses at the crack tip calculated by the finite element method. The stress intensity factors are indicated in charts under arbitrary material combinations. For small edge interface crack, it is found that the dimensionless stress intensity factors FI and FII are not always finite depending on Dundurs' parameters α and β. In the present study, the variations of the dimensionless stress intensity factors FI and FII are clarified under arbitrary material combination with varying the relative crack length a/W. It is found that when a/W ≤ 0.4 the value of FI increases with increasing α and when a/W ≥ 0.4 the value of FI decreases with increasing α.

Stress Intensity Factor of an Edge Interface Crack in a Bonded Finite Plate under Arbitrary Material Combination Subjected to Tension