Characterization of Cracks From Ultrasonic Scattering Data

[+] Author and Article Information
J. D. Achenbach, D. A. Sotiropoulos, H. Zhu

Department of Civil Engineering, Northwestern University, Evanston, IL 60201

J. Appl. Mech 54(4), 754-760 (Dec 01, 1987) (7 pages) doi:10.1115/1.3173112 History: Received December 10, 1986; Revised June 24, 1987; Online July 21, 2009


An inverse method for ultrasonic scattering data is proposed, to characterize a planar crack of general shape contained in an elastic solid. The method is based on an integral representation for the scattered field in the frequency domain. For a given scattered field the inverse problem has been formulated as a nonlinear optimization problem. At low frequencies its solution gives the location of the crack, the orientation of the crack-plane, and the crack-opening volumes. In addition the Mode I stress-intensity factor is obtained for a related static stress state corresponding to service loads.

Copyright © 1987 by ASME
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