期刊
ENGINEERING FRACTURE MECHANICS
卷 199, 期 -, 页码 29-40出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2018.05.023
关键词
Multi-scale crack propagation; Fatigue life prediction; Microstructural dissimilitude; Nickel-based alloy
类别
资金
- National Natural Science Foundations of China [51575183, 51725503]
- 111 project
- Shanghai Technology Innovation Program of SHEITC [CXY-2015-001]
- Fok Ying Tung Education Foundation, China
- Young Program of Yangtze River Scholars
This paper was concerned with an approach to predict fatigue life based on a multi-scale crack propagation model. The expressions of crack propagation rates in microstructurally small crack (MSC), physically small crack (PSC) and long crack (LC) stages were unified in the multi-scale crack propagation model. Its integral form presented a fatigue life prediction approach. The nickel-based GH4169 alloy was employed to validate the prediction capacity of present approach. The prediction results of lives of specimens with different initial defects sizes were compared with the experimental data.
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