Journal
INTERNATIONAL JOURNAL OF TURBO & JET-ENGINES
Volume 29, Issue 2, Pages 79-87Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/tjj-2012-0013
Keywords
fatigue; Corten-Dolan's model; nonlinear fatigue damage accumulation; life prediction
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Funding
- National Natural Science Foundation of China [51075061]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20090185110019]
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Based on the derivation and calculation of the Corten-Dolan exponent d, a practical method of determining its value is proposed. This exponent depends not only upon the materials, but also upon the load spectrums. Therefore its value is obtained by a function which decreases with increasing stress amplitude. This exponent was investigated through analysis of fatigue damage evolution to determine its parameters. The proposed method has been effectively proved by experimental data from literature. Utilization of the modified Corten-Dolan's model significantly improves its life prediction capability when compared to the conventional model where that exponent was assumed to be constant.
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