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A study of vibration-induced fretting corrosion for electrical connectors.

机译:电连接器振动引起的微动腐蚀研究。

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摘要

Vibration induced fretting degradation is a widely recognized failure phenomenon. However, the basic mechanisms that control the onset and progression of such fretting behavior are not well understood and are a topic of considerable interest in the electrical connector community. In this dissertation, four research projects on this topic are described.; The first two projects examined the physical characteristics of vibration-induced fretting corrosion and focused on PC-type connectors and automotive-type connectors respectively. The influence of connector design, wire tie-off length, vibration profile, and lubrication were considered. It was found that both connector designs exhibited self-consistent relative displacement amplitude thresholds for the onset of fretting corrosion regardless of the excitation frequency. Also, there was a general linear dependency upon the g-level with regard to fretting rates for single frequency excitation. A mathematical model was developed that related the early stage fretting corrosion rate to the threshold vibration levels for the connectors. Additionally, a connector lubricant was tested and observed to inhibit fretting over the amplitude and frequency ranges, as expected.; The third project examined the influence of normal force and finish characteristics for vibration-induced fretting degradation. Two finish types and three normal force levels for each finish type were considered, with the objective of determining which created a larger fretting degradation. Once again, a threshold vibration level and a linear fashion resistance change of fretting were found. The relative motion transfer function was also shown to provide a good measure of the tendency to fret. Finally, a comparison of the fretting performance between two commercial connectors was performed as an application of this fretting study.; The fourth and final project considered the application of FEA simulation techniques to the prediction of vibration-induced fretting degradation. A single blade/receptacle contact pair was analyzed both experimentally and with an FEA model. The same transfer functions for one type of contact pair were obtained from both simulation and experiment, and the same x-axis relative motions were observed in the simulation when the threshold fretting displacements from the experiment were used. Generally, the results from the simulation matched those from the experiment very well. The results showed that for this limited system, finite element modeling and analysis have great potential for evaluating the influence of design variations on fretting behavior.
机译:振动引起的微动磨损是一种公认​​的故障现象。然而,控制这种微动行为的发生和发展的基本机制还没有被很好地理解,并且是电连接器界相当感兴趣的一个话题。本文描述了四个有关该主题的研究项目。前两个项目研究了振动引起的微动腐蚀的物理特性,并分别关注PC型连接器和汽车型连接器。考虑了连接器设计,扎线长度,振动曲线和润滑的影响。已发现,无论激励频率如何,两种连接器设计都针对微动腐蚀的发作表现出自洽的相对位移幅度阈值。而且,关于单频率激励的微动速率,一般存在与g值的线性相关性。建立了数学模型,将早期的微动腐蚀速率与连接器的阈值振动水平相关联。另外,如预期的那样,对连接器润滑剂进行了测试并观察到在振幅和频率范围内抑制了微动。第三个项目研究了法向力和光洁度特性对振动引起的微动磨损的影响。考虑了两种饰面类型和每种饰面类型的三个法向力水平,目的是确定哪种会产生更大的微动磨损。再一次发现了微动的阈值振动水平和线性时尚阻力变化。还显示了相对运动传递函数,可以很好地衡量烦恼的趋势。最后,作为该微动研究的应用,对两个商用连接器之间的微动性能进行了比较。第四个也是最后一个项目考虑了FEA模拟技术在预测振动引起的微动磨损中的应用。通过实验和FEA模型分析了单个刀片/插座接触对。从仿真和实验中获得了一种类型的接触对的相同传递函数,并且当使用实验中的阈值微动位移时,在仿真中观察到了相同的x轴相对运动。通常,模拟的结果与实验的结果非常吻合。结果表明,对于这种有限的系统,有限元建模和分析在评估设计变化对微动行为的影响方面具有巨大的潜力。

著录项

  • 作者

    Xie, Fei.;

  • 作者单位

    Auburn University.;

  • 授予单位 Auburn University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 188 p.
  • 总页数 188
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

  • 入库时间 2022-08-17 11:40:17

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