Abstract Under vibration loading, fretting wear between bolted joint interfaces may change the dynamic characteristics of structures. Even the reliability of long-lasting assembly structures could be affected. This paper focuses on an experimental study on the fretting wear behavior of bolted joint interfaces under tangential loading. A recently developed fretting test apparatus was used to measure the hysteresis loops and the bolt preload at different fretting wear cycles. Changes of tangential contact stiffness and friction coefficient were estimated from the measured hysteresis loops. Experimental results showed a large change in bolt preload, contact stiffness, and friction coefficient due to fretting wear. The effect of surface roughness on fretting wear behavior of bolted joint interfaces was discussed. A modified Iwan model, comprehensive of wear effects, was proposed to simulate the hysteresis loops. Comparison between simulations and experimental results was performed to validate the proposed method. Results achieved in this research can provide the basis for the dynamic analysis of long-lasting joint structures in which wear plays a fundamental role in modifying the contact parameters.

中文翻译：

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螺栓连接接口的微动磨损

摘要 在振动载荷作用下，螺栓连接界面之间的微动磨损可能会改变结构的动力特性。甚至持久组装结构的可靠性也会受到影响。本文重点研究切向载荷下螺栓连接界面微动磨损行为的实验研究。最近开发的微动测试装置用于测量不同微动磨损循环下的磁滞回线和螺栓预紧力。切向接触刚度和摩擦系数的变化是从测量的滞后回线中估计出来的。实验结果表明，由于微动磨损，螺栓预紧力、接触刚度和摩擦系数发生了很大变化。讨论了表面粗糙度对螺栓连接界面微动磨损行为的影响。修改后的伊万模型，综合磨损效应，被提议用来模拟磁滞回线。进行模拟和实验结果之间的比较以验证所提出的方法。本研究取得的结果可以为长寿命关节结构的动态分析提供基础，其中磨损在修改接触参数方面起着重要作用。