EFFECT OF AN INCLUSION ON THE INTERACTION OF ELASTIC-WAVES WITH A CRACK

The problem of the scattering of time-harmonic elastic waves by a conf iguration of a crack and an adjacent inclusion embedded in a 2-D infin ite elastic medium is investigated by the traction boundary integral e quation (TBIE) method. The result of the formulation is a system of si x coupled singular integral equations for the unknown displacement jum ps across the crack as well as for the displacement and traction compo nents on the interface boundary between the inclusion and elastic medi um. A simple regularization method is used to regularize the hypersing ular arisen in the TBIE. Numerical results for elastodynamic stress in tensity factors have been obtained for several geometrical configurati ons, where the influence of the incident angle of plane longitudinal w aves, the size and location of the inclusion, and the hardness of the inclusion on the stress intensity factors is fully discussed.