抄録
The scattering problem for cracks in the three-dimensional elastic body is formulated by the boundary integral equations. The process to solve the boundary integral equations is briefly summarized and the expression of the scattering cross-section is shown for the scattering problem by cracks. In the numerical analysis, the frequency property of the scattering cross-section is considered for planar configurations of cracks. The multiple scattering effect is investigated for the scattering cross-section and the influence of the crack distance is discussed.
