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RESEARCH PAPERS

Subsurface Cracks Under Conditions of Slip, Stick, and Separation Caused by a Moving Compressive Load

[+] Author and Article Information
S. D. Sheppard

Department of Mechanical Engineering, Stanford University, Stanford, CA 94305

J. R. Barber, M. Comninou

Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109

J. Appl. Mech 54(2), 393-398 (Jun 01, 1987) (6 pages) doi:10.1115/1.3173025 History: Received June 20, 1985; Revised July 20, 1986; Online July 21, 2009

Abstract

The Mode I and II stress intensity factors (K I , K II ) at the two tips of a subsurface crack subjected to a moving compressive load are studied. Coulomb friction along the crack faces results in a number of history dependent slip-stick configurations and nonsymmetric variation in K I and K II . The formulation used to study this variation involves a singular integral equation in two variables which must be solved numerically, and because of the history dependence, requires an incremental solution. Crack lengths and coefficients of friction that result in as many as three zones for any load location are considered in this paper, while a previous paper (Sheppard et al., in press) was limited to configurations involving two zones only.

Copyright © 1987 by ASME
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