Measurements of Mixed-Mode Crack Surface Displacements and Comparison With Theory

[+] Author and Article Information
W. N. Sharpe

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, La. 70803

N. J. Altiero

Department of Metallurgy, Mechanics, and Materials Science, Michigan State University, East Lansing, Mich.

A. Mirmohamadsadegh

Department of Mechanical Engineering, University of Science and Technology, Narmak, Tehran, Iran

J. Appl. Mech 47(3), 557-562 (Sep 01, 1980) (6 pages) doi:10.1115/1.3153731 History: Received October 01, 1979; Revised February 01, 1980; Online July 21, 2009


The problem of a finite-width tension specimen containing a crack oriented at various angles to the load axis is attacked from experimental and theoretical viewpoints. Displacements of an electro-machined slot, 12.5 mm long and oriented at angles of 0°, 15°, 30°, 45°, 60°, and 75°, are measured using a laser-based in-plane measuring technique. Various width specimens, ranging from a crack-length/width ratio of 0.167 to 0.794, are tested. A boundary-integral equation method is extended to deal with the presence of a sharp crack. Agreement between the two approaches is generally good except near the tips of the cracks.

Copyright © 1980 by ASME
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