Analysis of failure behaviors of dovetail assemblies due to high gradient stress under contact loading

Da-Sheng Wei; Yan-Rong Wang; Xiao-Guang Yang

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Analysis of failure behaviors of dovetail assemblies due to high gradient stress under contact loading

机译：接触载荷下燕尾槽组件由于高梯度应力而失效的行为分析

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Two key questions of fretting fatigue of dovetail assemblies should be still investigated to meet the engineering requirement. One is describing the high gradient stress at the edges of contact in blade/disc assembly exactly, especially introducing the plasticity. The other is finding the suitable parameters to correlate the fretting failure under contact loading. Finite element (FE) models of one dovetail assembly with different mesh sizes are used to calculate the plastic contact stresses near the edges of the contact zone, and then a failure model is established to predict the initiation of a crack.

机译：燕尾组件微动疲劳的两个关键问题仍应进行研究，以满足工程要求。一种是精确描述叶片/圆盘组件接触边缘处的高梯度应力，特别是引入了可塑性。另一个是找到合适的参数来关联接触载荷下的微动破坏。一个燕尾组件的具有不同网格尺寸的有限元（FE）模型用于计算接触区域边缘附近的塑性接触应力，然后建立破坏模型以预测裂纹的产生。

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《Engineering failure analysis》 |2011年第1期|共11页
作者
Da-Sheng Wei; Yan-Rong Wang; Xiao-Guang Yang;
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正文语种 eng
中图分类工程力学;
关键词
Fretting fatigue; High gradient stress; Dovetail assemblies; Crack initiation;

机译：微动疲劳;高梯度应力;燕尾组件;裂纹萌生;

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Analysis of failure behaviors of dovetail assemblies due to high gradient stress under contact loading

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