Exact Transient Full-Field Analysis of an Antiplane Subsurface Crack Subjected to Dynamic Impact Loading

[+] Author and Article Information
Chien-Ching Ma, Szu-Kuzi Chen

Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 10764, R.O.C.

J. Appl. Mech 61(3), 649-655 (Sep 01, 1994) (7 pages) doi:10.1115/1.2901509 History: Received September 30, 1992; Revised June 12, 1993; Online March 31, 2008


The transient problem of a half-space containing a subsurface inclined semi-infinite crack subjected to dynamic antiplane loading on the boundary of the half-space has been investigated to gain insight into the phenomenon of the interaction of stress waves with material defects. The solutions are determined by superposition of the fundamental solution in the Laplace transform domain. The fundamental solution is the exponentially distributed traction on crack faces. The exact close-form transient solutions of stresses and displacement are obtained in this study. These solutions are valid for an infinitely long time and have accounted for the contributions of incident, reflected, and diffracted waves. Numerical results of the transient stresses are obtained and compared with the corresponding static values. The transient solution has been shown to approach the static value after the first few diffracted waves generated from the crack tip have passed the observation point.

Copyright © 1994 by The American Society of Mechanical Engineers
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