期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 131, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2019.105304
关键词
Torsional loading; Mean stress; Crack paths; Stage I fatigue crack growth; Stage II fatigue crack growth
资金
- National Natural Science Foundation of China (NSFC) [51771208]
In order to essentially study the influence of axial static tension on torsional fatigue crack propagation, cyclic torsion with and without axial static tension are carried out for coarse-grained copper. Results show that static tension affects the crack propagation behavior of coarse-grained copper in two ways: it can not only affect the growth direction of Stage I crack growth, but can also lead to the transition of surface crack from Stage I to Stage II. The micro-mechanisms produced by mean stress on crack propagation, particularly the transition mechanism from Stage I to Stage II crack growth, are analyzed.
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