计及磨损的电连接器插拔力分析  

Insertion and Withdrawal Forces of Electrical Connectors Considering Wear

作　　者：李友华 沈飞 王志慧[2] 刘奕光 邢前 柯燎亮 Youhua Li;Fei Shen;Zhihui Wang;Yiguang Liu;Qian Xing;Liaoliang Ke(School of Mechanical Engineering,Tianjin University,Tianjin300350;China Aerospace Science and Technology Corporation,Beijing100071)

机构地区：[1]天津大学机械工程学院,天津300350 [2]中国航天标准化与产品保证研究院,北京100071

出　　处：《固体力学学报》2024年第1期52-60,共9页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金项目(11725207);天津市研究生科研创新项目(2022BKY119)资助.

摘　　要：电连接器在工程中使用量大,接触失效情况严重,一旦发生失效则有可能影响设备的正常使用甚至毁坏设备.针对电连接器接触失效占比率较高,且磨损对插拔力的影响规律未知等问题,本文以国产某型号电连接器为研究对象,建立电连接器的等效有限元模型,使用自适应网格技术和耗散能磨损模型进行磨损模拟,获得不同插拔次数下接触表面的磨损形貌,讨论不同插拔次数下磨损程度对电连接器插拔力的影响.结果表明,随着插拔次数的增加,电连接器表面的磨损会逐渐严重,插拔力的波动现象也会更加明显,且磨损对电连接器的拔出力影响较插入力更明显.Electrical connectors widely used in electrical and electronic devices suffer from severe contact failure problems which determine the reliable service of these devices or even cause their destruction.The insertion and withdrawal forces are significant factors to evaluate the performance and quality of electrical connectors.The wear behavior due to the repeated insertion and withdrawal processes has a non-negligible influence on the forces.Therefore,the forces and wear behavior are investigated in this paper.A simulation model is developed to study and evaluate the performance of electrical connectors.The finite element method(FEM)is used to simulate the insertion and withdrawal processes and the wear profile of an electrical connector in the application.According to the development of the FEM model of the electrical connector,the equivalent insertion and withdrawal forces with and without the consideration of wear behavior are calculated.Frictional behavior is used to study the insertion and withdrawal forces without considering wear.In cooperation with the adaptive mesh technique of the commercial FEM software ABAQUS,the wear model based on frictional dissipation energy is applied to predict the wear morphology.The characteristics of the insertion and withdrawal procedure are analyzed using the forces vs.time curves.Furthermore,the wear profiles of the contact surface are obtained at different times of the insertion and withdrawal processes,and the effect of wear on the insertion and withdrawal forces of the electrical connector is discussed.The critical number of insertions and withdrawals leading to a larger wear depth is found.The size parameter of the contact component is modified to validate the conclusion of wear influence.It is worth emphasizing that this study is significant to the failure problem of electrical connectors and provides a guideline for the production and application of electrical connectors.

关 键 词：电连接器 磨损分析 插拔力 有限元模型 自适应网格 

分 类 号：TM503.5[电气工程—电器]