期刊
ENGINEERING FAILURE ANALYSIS
卷 102, 期 -, 页码 395-406出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2019.04.050
关键词
TCD; Crankshaft; Fatigue limit load; Stress gradient
资金
- National Natural Science Foundation of The Jiangsu Higher Education Institutions of China [18KJB460019]
- National Natural Science Foundation of China [51605228, 51505229]
- Project of Talent Peak Covering Six Industries in Jiangsu Province [JXQC-025]
- Youth Science & Technology Innovation Project of Nanjing Forestry University [CX2016028]
- Nanjing Institute of Technology Research Fund Project [QKJ201701]
In this article, high-cycle bending fatigue limit load prediction of several sets of high-strength steel crankshafts are conducted based on the critical distance (TCD)approach. Firstly, the critical length of the critical distance of the crankshaft is determined by the crack-modeling technique. Then the equivalent stress of the crankshaft is calculated by a combined method of the finite element and interpolation. Finally the fatigue limit load of the crankshaft with the same material but different structure is computed. Validation between the predictions and the experimental results shows that the conventional TCD may result in some errors in such fatigue limit load prediction, especially for the critical point method(the error may be larger than 10%). While the modified TCD proposed in this paper can provide a more satisfactory result in terms of the fatigue limit for a quick engineering prediction and is thus more suitable to be taken into the actual engineering applications.
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