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RESEARCH PAPERS

Nondestructive Evaluation of the J and M Integrals

[+] Author and Article Information
R. B. King, G. Herrmann

Division of Applied Mechanics, Department of Mechanical Engineering, Stanford University, Stanford, Calif. 94305

J. Appl. Mech 48(1), 83-87 (Mar 01, 1981) (5 pages) doi:10.1115/1.3157597 History: Received April 01, 1980; Revised July 01, 1980; Online July 21, 2009

Abstract

The usefulness of two conservation integrals, the so-called J and M integrals, in fracture mechanics is reviewed. A method for experimental evaluation of these quantities by direct determination of the values of their integrands at various points along a contour is presented, and contrasted with “compliance” methods which have been used to evaluate J. This technique has been applied to three different specimen configurations, and the experimental results compare favorably with theoretical predictions.

Copyright © 1981 by ASME
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