Nonlinear cumulative damage model for multiaxial fatigue
Nonlinear cumulative damage model for multiaxial fatigue
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DOI：
10.1007/s11465-006-0035-x
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发表时间：
2006-09
影响因子：
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通讯作者：
Shang De-guang;Sun Guo-qin;D. Jing;Yan Chu-liang
中科院分区：
文献类型：
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作者：
Shang De-guang;Sun Guo-qin;D. Jing;Yan Chu-liang
在连续介质疲劳损伤理论的基础上，首次提出了非线性单轴疲劳累积损伤模型。为了描述多轴疲劳损伤特性，基于临界平面法建立了非线性多轴疲劳累积损伤模型。该模型可以考虑多轴疲劳极限、平均静水压力以及损伤变量和加载参数的不可分离特性。推导了多级加载下疲劳损伤模型的递推公式，用于预测多轴疲劳寿命。结果表明，所提出的非线性多轴疲劳累积损伤模型优于Miner准则。
On the basis of the continuum fatigue damage theory, a nonlinear uniaxial fatigue cumulative damage model is first proposed. In order to describe multiaxial fatigue damage characteristics, a nonlinear multiaxial fatigue cumulative damage model is developed based on the critical plane approach. The proposed model can consider the multiaxial fatigue limit, mean hydrostatic pressure and the unseparated characteristic for the damage variables and loading parameters. The recurrence formula of fatigue damage model was derived under multilevel loading, which is used to predict multiaxial fatigue life. The results showed that the proposed nonlinear multiaxial fatigue cumulative damage model is better than Miner’s rule.