A GENERALIZED LOCAL STRAIN APPROACH TO CONSIDERING THICKNESS EFFECT ON FATIGUE PERFORMANCE

机译：考虑厚度对疲劳性能影响的广义局部应变方法

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Firstly stress concentration factors for single-edge-notch tension (SENT) specimens under different thickness-induced stress states are expressed in an explicit form by fitting the three-dimensional finite element analysis results. Then a generalized local strain approach is developed to incorporate this 'thickness effect'. Also machining technique influence factor is introduced to consider the specimen machining quality. Validation against calculation and fatigue test result for SENT specimen shows the calculation obtained by the proposed approach is in better agreement with experimental result than traditional prediction. Also the generalized local strain approach can be further applied to fatigue life prediction of other type specimens under different thickness-induced stress states.

机译：首先，通过拟合三维有限元分析结果，以显式形式表示在不同厚度引起的应力状态下单边缘缺口拉力（SENT）试样的应力集中因子。然后，开发了一种通用的局部应变方法来结合这种“厚度效应”。并介绍了加工技术的影响因素以考虑样品的加工质量。通过对SENT标本的计算和疲劳试验结果的验证，表明与传统的预测方法相比，该方法获得的计算结果与实验结果更加吻合。广义局部应变方法也可以进一步应用于其他类型试样在不同厚度引起的应力状态下的疲劳寿命预测。

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来源
《Congress of the International Council of the Aeronautical Sciences; 20060903-08; Hamburg(DE)》|2006年|P.1741-1746|共6页
会议地点 Hamburg(DE)
作者
Yuting HE; Feng LI; Hengxi ZHANG;
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作者单位

Department of Aircraft Engineering, Engineering College, Air Force Engineering University, 710038, Xi'an, P.R.China;

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会议组织
原文格式 PDF
正文语种 eng
中图分类航空;
关键词
generalized local strain approach; thickness effect; stress state; fatigue life;

机译：广义局部应变法;厚度效应;应力状态;疲劳寿命;

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A GENERALIZED LOCAL STRAIN APPROACH TO CONSIDERING THICKNESS EFFECT ON FATIGUE PERFORMANCE

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