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多轴载荷下缺口试件疲劳寿命预测研究
引用本文:李静,孙强,李春旺,张忠平,乔艳江.多轴载荷下缺口试件疲劳寿命预测研究[J].固体力学学报,2011,32(1).
作者姓名:李静  孙强  李春旺  张忠平  乔艳江
作者单位:空军工程大学理学院,西安,710051
基金项目:空军工程大学理学院学位论文创新基金(2007S001)资助
摘    要:基于临界平面法,在分析光滑薄壁圆管试件疲劳寿命预测模型的基础上,借助有限元应力应变分析,进一步将模型推广应用到了缺口试件的多轴疲劳寿命预测中,并利用坐标变换原理,明确了临界平面及有效循环变量的确定方法.在存在平均应力的情况下,分析了平均应力对疲劳寿命的影响,并对所建模型进行了平均应力修正.

关 键 词:缺口试件  多轴疲劳  寿命预测  有限元分析  平均应力  

FATIGUE LIFE PREDICTION FOR NOTCHED SPECIMEN UNDER MULTIAXIAL LOADING
Jing Li,Qiang Sun,Chunwang Li,Zhongping Zhang,Yanjiang Qiao.FATIGUE LIFE PREDICTION FOR NOTCHED SPECIMEN UNDER MULTIAXIAL LOADING[J].Acta Mechnica Solida Sinica,2011,32(1).
Authors:Jing Li  Qiang Sun  Chunwang Li  Zhongping Zhang  Yanjiang Qiao
Institution:Jing Li Qiang Sun Chunwang Li Zhongping Zhang Yanjiang Qiao(The Science Institute,Air Force Engineering University,Xi'an,710051)
Abstract:Based on the critical plane approach,the recently proposed multiaxial fatigue life prediction model applied to the smoothing tubular specimen is extended to assess the multiaxial fatigue life of notched one.Besides,with the aid of finite element analysis(FEA),the orientation of the critical plane and the effective cyclic parameter are determined by using the coordinate transformation principle.In the meantime,the proposed model is modified to take into consideration of the effect of mean stress when existin...
Keywords:notched specimen  multiaxial fatigue  life prediction  finite element analysis  mean stress  
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