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Numerical experiments on the near and far field of acoustic and elastic waves scattered by cracks

Alves, Carlos J. S.

Proceedings of the International Conference in Engineering & Science 2001 (S. Atluri,T. Nishioka, M. Kikuchi, editors) , Tech Science Press (2001),

In this talk we will present some numerical experiments made with codes based on a boundary element method using a variational formulation for acoustic and elastic scattering by cracks on the three dimensional space.
These experiments show the perturbation of the acoustic near and far field due to the change of the shape of the scattering obstacle and the possibilities of establishing criteria for detection.
Similar experiments will be shown for three-dimensional elastic scattering. This work complements some of the numerical results already presented in [1], [2], [3], [4], [5].