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Proceedings Paper

Application of over-and-under method in measurement of threshold of fatigue crack propagation in H2S environment
Author(s): Song Yang; Yiliang Zhang; Jinquan Xu
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Paper Abstract

The threshold in fatigue crack propagation (▵Kth), which is a principal indicator of the property resistant to fracture of members bearing crack defect during the process of corrosion fatigue, plays an important role in engineering project. ▵Kth cannot be directly obtained from test methods due to the accurate measurement of crack extension could not be conducted with the current test methods. The over-and-under method of fatigue reliability theory is innovatively introduced into the test determination of ▵Kth. Meanwhile, a flatbase for the determination of ▵Kth in low cycle fatigue H2S environment is set up. Additionally, data analysis is conducted by the way corresponding to the over-and-under method. The results show that: 1) The test determination of ▵Kth can be effectively obtained through the test flatbase of corrosion fatigue. 2) The accurate measurement and study of ▵Kth in low cycle fatigue H2S environment is realized by the over-and-under method of fatigue reliability theory. 3)The ▵Kth in air environment is obviously greater that the one in low cycle fatigue H2S environment, where they differ by more than 50%.

Paper Details

Date Published: 24 August 2009
PDF: 7 pages
Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73751E (24 August 2009); doi: 10.1117/12.839058
Show Author Affiliations
Song Yang, Beijing Univ. of Technology (China)
Yiliang Zhang, Beijing Univ. of Technology (China)
Jinquan Xu, Beijing Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7375:
ICEM 2008: International Conference on Experimental Mechanics 2008
Xiaoyuan He; Huimin Xie; YiLan Kang, Editor(s)

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