De-Oscillatory Displacement Jumps Method for Calculation of Stress Intensity Factors for Three-Dimensional Bimaterial Interface Cracks

A numerical approach is to be proposed for calculation of the mixed-mode stress intensityfactors for three-dimensional bimaterial interface cracks. The approach is established byintroducing the technique termed ‘de-oscillatory displacement jumps’. With this approach, thestress intensity factors can be effectively calculated by direct extraction of the finite elementsolutions of the near-tip displacement jumps across the crack surfaces. The results from theproposed approach can also be used as an effective indicator for evaluation of accuracy of thecalculation. Since neither additional auxiliary nor fundamental solutions are required in itsformulation, this proposed approach is applicable for problems containing three-dimensionalcurved cracks of arbitrary shape.