Exact solutions of two semi-infinite collinear cracks in a strip

The stress intensity factors (SIFs) are calculated for an infinitely long strip of finite height containing two straight semi-infinite collinear cracks, which is a very useful model in simulating the interaction of faults in the study of tectonic earthquake. The new solutions are obtained by complex function method. It is shown that two well-known exact solutions for the crack problems are the limiting cases of the present results.