Elastic wave scattering from multiple and compound flaws (original) (raw)

The Journal of the Acoustical Society of America, 1980

Abstract

If the nondestructive evaluation (NDE) of flaws in structural materials it is often important to distinguish between a single flaw or cavity, two cavities separated by a finite distance and a compound flaw when two cavities intersect. Using the T-matrix method, numerical results have been obtained for P waves incident on such geometries as a function of incident wave frequency and the scattering geometry. In each case, results have been obtained using several approaches. Approximate solutions including only single scattering effects are compared with exact results as the distance between the scatterers change. The compound flaw can be treated as a single flaw or as two flaws in contact. The above results will be compared with experimental results showing good agreement.

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