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Abstract Abstract: For engineering components under multiaxial loadings, fatigue life prediction is significant for guaranteeing their structural safety. A new energy-based model for fatigue life prediction is proposed based on the critical plane approach. The proposed model takes the different energy parameters acting on critical plane as the damage parameters to distinguish different failure modes. These damage parameters can reflect not only the mean stress effect but also the influences of normal and shear components on fatigue damage. The proposed model and three other classical energy-based models were used to evaluate the fatigue life of six kinds of materials under multiaxial loading. Results show that the proposed model has better prediction accuracy and engineering applicability.
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Received: 15 January 2019
Published: 20 June 2019
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Corresponding Authors:
Zheng Zhong
E-mail: zhongk@mail.tongji.edu.cn;zhongk@tongji.edu.cn
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2019, Vol. 40 
