期刊
出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954410016641448
关键词
Ductility exhaustion; strain energy; fatigue; life prediction; mean stress
资金
- National Natural Science Foundation of China [11302044, 11272082]
A unified ductility criterion for fatigue-creep life prediction is presented based on the static fracture toughness exhaustion and dissipated cyclic strain energy density of high temperature components. It provides a general failure criterion for both low and high cycle fatigue regimes. The effects of mean stress, creep and loading waveform on fatigue life are incorporated into this criterion. Applicability and prediction accuracy of the newly proposed criterion was validated through comparing model predictions to experimental results taken from the literature. The results show that the proposed criterion is robust for different loading conditions and more accurate than other existing strain energy/ductility-based methods.
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