Estimation of fatigue crack propagation rate in steel
Journal Article
·
· Engineering Fracture Mechanics
OSTI ID:53408
- Northwestern Polytechnical Univ., Shaanxi Province (China)
Based on the fatigue crack propagation (FCP) expression developed by X. Zheng and M. A. Hirt, a new method for the estimation of FCP rate is suggested. It is pointed out that when Delta K(sub th) (the FCP threshold) and the mechanism in the intermediate region of FCP are known, the FCP rates can be predicted from tensile properties. In this paper, the FCP rate curves of low alloy steels SM50B, HT80, SP42, SPV50, and their welded joints are predicted. It is shown that the predicted lines agree fairly well with the test results. It is also shown that FCP threshold Delta K(sub th) is sensitive to stress ratio R but not to weld technology. 15 refs.
- OSTI ID:
- 53408
- Journal Information:
- Engineering Fracture Mechanics, Journal Name: Engineering Fracture Mechanics Journal Issue: 3 Vol. 48; ISSN 0013-7944; ISSN EFMEAH
- Country of Publication:
- United States
- Language:
- English
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