On the Short Fatigue Crack Propagation Rate at Notch

Xu Li; Ji Bingyan

doi:10.13374/j.issn1001-053x.1991.06.034

Volume 13 Issue 6

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Xu Li, Ji Bingyan. On the Short Fatigue Crack Propagation Rate at Notch[J]. Chinese Journal of Engineering, 1991, 13(6): 604-607. doi: 10.13374/j.issn1001-053x.1991.06.034

Citation:

Xu Li, Ji Bingyan. On the Short Fatigue Crack Propagation Rate at Notch[J]. Chinese Journal of Engineering, 1991, 13(6): 604-607. doi: 10.13374/j.issn1001-053x.1991.06.034

Xu Li, Ji Bingyan. On the Short Fatigue Crack Propagation Rate at Notch[J]. Chinese Journal of Engineering, 1991, 13(6): 604-607. doi: 10.13374/j.issn1001-053x.1991.06.034

Citation:

Xu Li, Ji Bingyan. On the Short Fatigue Crack Propagation Rate at Notch[J]. Chinese Journal of Engineering, 1991, 13(6): 604-607. doi: 10.13374/j.issn1001-053x.1991.06.034

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On the Short Fatigue Crack Propagation Rate at Notch

doi: 10.13374/j.issn1001-053x.1991.06.034

Xu Li¹,
Ji Bingyan²

1. National Institute of Metrology, Beijing;
2. Department of Mathematics and Mechanics

Received Date: 1991-03-15
Available Online: 2021-10-26

Abstract

Abstract

Reconstructed model technique is successfully applied to measure short fatigue crack length in the testing work. According to elastic-plastic fracture mechanics method, it is put forward an estimated formula for short fatigue crack propagation rate at notch. Using △ε_p (effective plastic strain range of crack tip) as a controlling parameter, the solution to the normalizing problem of propagation rate of short fatigue crack as well as long fatigue crack at notch for 45^# steel are given.
- short crack,
- fatigue,
- propagation rate