Mean Stress and Ratcheting Corrections in Fatigue Life Prediction of Metals
Mean Stress and Ratcheting Corrections in Fatigue Life Prediction of Metals
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DOI：
10.4028/www.scientific.net/amm.853.57
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
Q. Lei;Peng Yue;Qiang Liu;Shun‐Peng Zhu;Hongcheng Huang
中科院分区：
文献类型：
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作者：
Q. Lei;Peng Yue;Qiang Liu;Shun‐Peng Zhu;Hongcheng Huang
考虑到平均应力的影响，工程构件在平均应力方向上会发生渐进累积的非弹性应变，简称棘轮效应。基于延性耗尽理论，提出了一个新的模型来考虑平均应力和棘轮效应对构件疲劳寿命的影响。将该模型的能力和准确性与步行者、Xia-Ellyin、Goswami、GDP和Peng模型进行了比较。在文献中提供的9组不同载荷条件下的实验数据的情况下，模型预测与测试寿命之间的比较令人满意。
Considering the effects of mean stress, the progressive accumulation inelastic strain occurs in engineering components under the direction of mean stress, it is simply known as ratcheting. Based on the ductility exhaustion theory, a new model is proposed to account for the effects of mean stress and ratcheting on the component fatigue life. The capability and accuracy of the proposed model are compared with those of Walker, Xia-Ellyin, Goswami, GDP and Peng models. A comparison between the model prediction and tested life is found to be quite satisfactory in the cases of 9 sets of experimental data available in the literature under different loading conditions.