RESEARCH PAPERS: Fatigue, Fracture, and Failure Analysis

An Analysis for Crack Instability in Elastically Confined Yielding Regime

[+] Author and Article Information
A. Zahoor

Impell Corp., Bethesda, MD 20814

J. Vib., Acoust., Stress, and Reliab 106(4), 488-494 (Oct 01, 1984) (7 pages) doi:10.1115/1.3269225 History: Received August 01, 1981; Online November 23, 2009


An analysis for crack instability is presented which utilizes a J -integral-based tearing modulus approach. In particular, a plane stress center-cracked panel which experiences elastically confined yielding is analyzed for a displacement controlled loading. The analysis assumes a compliant loading system, a special case of which leads to a load control mode of loading. The effects of the crack tip plasticity are taken into account by using the strip-yield model of Dugdale-Barenblatt. A method of predicting the amount of crack growth at the onset of instability is presented. Numerical results suggest that under conditions of small-scale yielding, crack instability can be achieved in materials having very low tearing modulus values.

Copyright © 1984 by ASME
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