1997 Volume 46 Issue 4 Pages 419-424
This paper deals with interaction problems of interface cracks with unequal length. The problems are analyzed by using the singular integral equations on the basis of the body force method. In the numerical analysis, the unknown function of body force density is approximated by the product of the fundamental density function and power series. The stress intensity factor of interface cracks is systematically calculated for various crack dimensions, spacing and elastic constants. The interaction effect of these variables is discussed by comparing the present results with the results of ordinary crack problems in a homogeneous material. The calculation shows that the effect of elastic constants of dissimilar materials on the dimensionless stress intensity factor F1 for interface cracks is small and F1-value of interface cracks is almost the same as that of ordinary cracks with the same geometrical condition.
