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RESEARCH PAPERS

Two-Parameter Characterization of Elastic-Plastic Crack-Tip Fields

[+] Author and Article Information
C. Betegón

Department of Construction, University of Oviedo, Oviedo, Spain

J. W. Hancock

Department of Mechanical Engineering, University of Glasgow, Glasgow, Scotland

J. Appl. Mech 58(1), 104-110 (Mar 01, 1991) (7 pages) doi:10.1115/1.2897135 History: Received June 27, 1989; Revised December 20, 1989; Online March 31, 2008

Abstract

Plane-strain elastic-plastic crack-tip fields have been modeled with modified boundary layer formulations based on the first two terms K and T , of the elastic field. These formulations match the appropriate full field solutions. Compressive T stresses reduce the stresses by an amount which is independent of radial distance, corresponding to the introduction of a second term in addition to the dominant plastic singularity. Geometries which maintain J -dominance are characterized by zero or positive T stresses, while geometries with negative T stresses can be described by a two-parameter characterization using J and T into full plasticity.

Copyright © 1991 by The American Society of Mechanical Engineers
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