A nonlinear fatigue damage accumulation model considering strength degradation and its applications to fatigue reliability analysis
A nonlinear fatigue damage accumulation model considering strength degradation and its applications to fatigue reliability analysis
复制标题
考虑强度退化的非线性疲劳损伤累积模型及其在疲劳可靠性分析中的应用
DOI：
10.1177/1056789514544228
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发表时间：
2015-07
影响因子：
4.2
通讯作者：
Huiying Gao
中科院分区：
文献类型：
--
作者：
Haiqing Li;Hong-Zhong Huang;Shun-Peng Zhu;Huiying Gao
疲劳是材料在循环载荷作用下性能不断劣化和退化的损伤累积过程。损伤累积分析对于防止疲劳失效的发生具有关键作用，损伤演化机制是疲劳行为研究的重要焦点之一。本文首先介绍了应力-强度干涉（SSI）模型的剩余强度退化模型，然后提出了基于Manson-Halford理论的非线性疲劳损伤累积模型。将所提出的非线性损伤累积模型与剩余强度退化模型相结合，提出了一种新的常幅和变幅载荷下疲劳寿命预测方法，该方法不仅考虑了载荷交互作用的影响，而且考虑了载荷历史引起的材料强度退化现象，可用于预测机械构件的可靠性和疲劳寿命。此外，该方法还可以直接从S-N曲线中获得剩余强度退化的材料参数，而无需进行额外的试验。最后，将试验数据与预测值进行比较，验证了所提出的剩余强度退化模型。此外，还利用两组试验数据对所提出的非线性疲劳损伤累积模型进行了验证，该模型可用于双应力水平下的疲劳寿命预测和多应力水平下的可靠性预测。结果表明，该方法具有良好的实验数据和预测值之间的协议。
Fatigue is a damage accumulation process in which the material property deteriorates and degenerates continuously under cyclic loading. The analysis of damage accumulation plays a key role in preventing the occurrence of fatigue failures, and the damage evolution mechanism is one of the important focuses of fatigue behavior. In this paper, a residual strength degradation model according to the stress–strength interference (SSI) model is introduced firstly; then a modified nonlinear fatigue damage accumulation model based on the Manson–Halford theory is proposed. Combining the proposed nonlinear damage accumulation model with the residual strength degradation model, a new method is developed for fatigue life prediction under constant and variable amplitude loading, which considers not only the effects of load interactions, but also the phenomenon of strength degradation of materials induced by loading history, and it can be used to predict the reliability and fatigue life of mechanical components. Moreover, the material parameter for the residual strength degradation can be obtained directly from S–N curve without running extra experiments. Finally, experimental data are used to compare with the predicted value in order to demonstrate the proposed residual strength degradation model. In addition, two sets of experimental data are also used to verify the proposed nonlinear fatigue damage accumulation model which is applied to predict fatigue life under two-stress level loading and reliability prediction under multi-stress level loading. The results show that the proposed method has a good agreement between the experimental data and predicted values.
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DOI：
10.1520/stp26949s
发表时间：
1977
期刊：
ASTM special technical publications
影响因子：
--
作者：
J. Yang
通讯作者：
J. Yang
影响因子：
2.9
作者：
Schaff, JR;Davidson, BD
通讯作者：
Davidson, BD
影响因子：
2.5
作者：
MANSON, SS;HALFORD, GR
通讯作者：
HALFORD, GR
影响因子：
2.9
作者：
Pei Chi Chou;R. Croman
通讯作者：
Pei Chi Chou;R. Croman
DOI：
10.1115/1.2943152
发表时间：
2008-11
影响因子：
1.5
作者：
O. Scott-Emuakpor;Herman Shen;T. George;C. Cross
通讯作者：
O. Scott-Emuakpor;Herman Shen;T. George;C. Cross