Multiaxial fatigue evaluation of type 316L stainless steel based on critical plane and energy dissipation
Multiaxial fatigue evaluation of type 316L stainless steel based on critical plane and energy dissipation
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DOI：
10.1111/ffe.13822
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发表时间：
2022-08
期刊：
影响因子：
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通讯作者：
E. Feng;Xiaogang Wang;C. Jiang
中科院分区：
文献类型：
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作者：
E. Feng;Xiaogang Wang;C. Jiang
对AISI316L钢多轴疲劳评估的临界平面法(CPA)和耗散能法(DEA)进行了比较研究。这是我们之前开发的用于多轴疲劳寿命预测的DEA模型的后续研究。结果表明，与一些经典的CPA模型相比，改进的DEA模型在预测精度和对多轴加载路径的通用性方面具有更好的整体性能。深入的裂纹机理研究表明，多轴疲劳寿命主要花在微裂纹的形成上，在不同的加载路径下表现出不同的特征。与CPA模型相比，DEA模型能更好地考虑这一影响。
This paper focuses on a comparative study of the critical plane approach (CPA) and the dissipated energy approach (DEA) for multiaxial fatigue evaluation on an AISI 316L steel. It is a follow‐up to our previous study on the development of a DEA model for multiaxial fatigue life prediction. The results demonstrate that the developed DEA model can provide overall better performance compared with some classic CPA models both in terms of prediction accuracy and versatility to multiaxial loading paths. An in‐depth crack mechanism investigation reveals that the multiaxial fatigue life is mostly spent in the formation of micro‐cracks, which exhibits distinct characteristics under the different loading paths examined. This effect can be better considered by using DEA model compared with the CPA models adopted.