Comparison of experiment and theory for elastic-plastic plane strain crack growth
Recent theoretical results on elastic-plastic plane strain crack growth, and experimental results for crack growth in a 4140 steel in terms of the theoretical concepts are reviewed. The theory is based on a recent asymptotic analysis of crack surface opening and strain distributions at a quasi-statically advancing crack tip in an ideally-plastic solid. The analysis is incomplete in that some of the parameters which appear in it are known only approximately, especially at large scale yielding. Nevertheless, it suffices to derive a relation between the imposed loading and amount of crack growth, prior to general yielding, based on the assumption that a geometrically similar near-tip crack profile is maintained during growth. The resulting predictions for the variation of J with crack growth are found to fit well to the experimental results obtained on deeply cracked compact specimens.
- Research Organization:
- Brown Univ., Providence, RI (USA). Dept. of Engineering
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-S-02-3084
- OSTI ID:
- 5489817
- Report Number(s):
- COO-3084/76; CONF-800358-1; TRN: 80-008613
- Resource Relation:
- Conference: Conference on micromechanisms of crack extension, Cambridge, UK, 31 Mar 1980
- Country of Publication:
- United States
- Language:
- English
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