Ductile Tearing Instability of a Center-Cracked Panel of an Elastic-Plastic Strain Hardening Material

[+] Author and Article Information
Akram Zahoor

Battelle’s Columbus Laboratories, Columbus, Ohio 43201

Paul C. Paris

Washington University, Saint Louis, Mo. 63130

J. Eng. Mater. Technol 103(1), 46-54 (Jan 01, 1981) (9 pages) doi:10.1115/1.3224971 History: Received January 18, 1978; Revised July 08, 1980; Online September 15, 2009


An analysis for crack instability in an elastic-plastic strain hardening material is presented which utilizes the J-integral and the tearing modulus parameter, T. A center-cracked panel of finite dimensions with Ramberg-Osgood material representation is analyzed for plane stress as well as plane strain. The analysis is applicable in the entire range of elastic-plastic loading from linear elastic to full yield. Crack instability is strongly influenced by the elastic compliance of the system, the conditions of plane stress or plane strain, and the hardening characteristics of the material. Numerical results indicate that if crack stability is ensured in a plane strain situation, then under the same circumstances a geometrically identical but plane stress panel will be stable.

Copyright © 1981 by ASME
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