Elastodynamic Stress-Intensity Factors for a Crack Near a Free Surface

[+] Author and Article Information
J. D. Achenbach, R. J. Brind

Department of Civil Engineering, Northwestern University, Evanston, Ill. 60201

J. Appl. Mech 48(3), 539-542 (Sep 01, 1981) (4 pages) doi:10.1115/1.3157670 History: Received October 01, 1980; Revised February 01, 1981; Online July 21, 2009


Elastodynamic Mode I and Mode II stress-intensity factors are presented for a subsurface crack in an elastic half space. The plane of the crack is normal to the surface of the half space. The half space is subjected to normal and tangential time-harmonic surface tractions. Numerical results show the variation of KI and KII at both crack tips, with the dimensionless frequency and the ratio a/b, where a and b are the distances to the surface from the near and the far crack tips, respectively. The results are compared with corresponding results for a crack in an unbounded solid.

Copyright © 1981 by ASME
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