Scattering of Ultrasonic Wave by Cracks in a Plate

[+] Author and Article Information
S. W. Liu, S. K. Datta

Department of Mechanical Engineering, CIRES and Center for Space Construction, University of Colorado, Boulder, CO 80309-0427

J. Appl. Mech 60(2), 352-357 (Jun 01, 1993) (6 pages) doi:10.1115/1.2900800 History: Received May 14, 1991; Revised April 27, 1992; Online March 31, 2008


A hybrid numerical method combining finite elements and the boundary integral representation is used to investigate the transient scattering of ultrasonic waves by a crack in a plate. The incident wave models the guided waves generated by a steel ball impact on the plate. Two surface-breaking cracks and one subsurface crack are studied here. The results show that the location and depth of cracks have measurable effects on the surface responses in time and frequency domains. Also, the scattered fields have distinct differences in the three cases.

Copyright © 1993 by The American Society of Mechanical Engineers
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