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首页> 外文期刊>International journal of materials & product technology >Residual stress analysis in cold-worked holes with interference bushing
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Residual stress analysis in cold-worked holes with interference bushing

机译：带过盈衬套的冷加工孔中的残余应力分析

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Cold working is widely applied in fatigue design of mechanical and aeronautical components with holes in order to induce a stress compression field in the most loaded zone and thus increase fatigue life. None of the investigations in literature consider the insertion of a bushing in the hole by a cold expansion process: in particular cases may be predicted the presence of tensile circumferential residual stress on hole surface, often loaded by external cyclic forces. The present investigation introduces a closed-form analytical method for simply predict the complete residual stress distribution on a cold-expanded bushing-hole connection commonly used in aerospace structures, under imposed conditions. A comparison of these solutions with 2-D finite element analysis reveals perfect agreement. Finally, the paper discusses the results of the closed-form solution obtained on several bushing-hole combinations, providing interesting indications in the fatigue design in order to obtaining the highest benefits on hole fatigue life.
机译：冷加工被广泛应用于带有孔的机械和航空部件的疲劳设计中，以在最大载荷区域产生应力压缩场，从而延长疲劳寿命。文献中的研究都没有考虑通过冷膨胀过程将衬套插入孔中：在特殊情况下，可以预见孔表面上会存在拉伸周向残余应力，而应力通常是由外部循环力加载的。本研究介绍了一种封闭形式的分析方法，该方法可简单地预测在施加条件下航空航天结构中常用的冷膨胀衬套-孔连接上的完整残余应力分布。这些解决方案与二维有限元分析的比较显示出完美的一致性。最后，本文讨论了在几种衬套-孔组合上获得的闭式解的结果，为疲劳设计提供了有趣的指示，以便获得最大的孔疲劳寿命收益。

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