航空电连接器热疲劳失效机理研究

doi:10.3969/j.issn.1000-1093.2016.07.015

摘要/Abstract

摘要： 电连接器插孔是弹性元件，在交变热应力的作用下易产生热疲劳，出现应力松弛现象，从而影响电连接器的接触可靠性。结合加速寿命试验理论，提出了一种电连接器热疲劳试验方案,设计了试验电路并进行了试验，分析了电连接器的热疲劳失效机理。试验结果表明：试品的接触电阻值随温度循环次数的增加而缓慢增长，其宏观原因是插孔收口处孔径增加，接触件间接触力减小；循环应力中温差或温度变化率的增加，会加速连接器接触电阻的增长。试验后试品插孔的金相分析发现: 温度循环条件下，连接器插孔中微观组织结构的变化，即插孔中的α相晶粒尺寸和滑移线密度均有所增加，滑移方向差异化程度增强，是导致其接触可靠性和性能逐步蜕化的根本原因；温差范围与温度变化率对电连接器性能蜕化的综合作用取决于滑移线密度与滑移方向差异化程度的“对抗”结果。

关键词: 飞行器仪表、设备, 航空电连接器, 热疲劳, 应力松弛, 金相分析, 失效机理, 性能蜕化

Abstract: Jack of electrical connectors is an elastic element. It is easy to show thermal fatigue and stress relaxation phenomenon under the effect of alternating thermal stress, which affects the contact reliability of electrical connectors. A thermal fatigue test scheme is proposed, and a test circuit is designed for experiment. The thermal fatigue failure mechanism of electrical connectors is analyzed. The test result shows that the value of contact resistance increases slowly with the increase in the number of thermal cycles. The macroscopic reason is that the aperture of jack increases and the contact pressure between contacts decreases. During test, the temperature difference or temperature change rate will accelerate the growth of contact resistance. Based on the metallographic analysis of jack after experiment, it is found that the change of microstructure (the crystal size and slip line density increase, the difference of slip direction is enhanced) is the fundamental reason to lead to the stress relaxation phenomenon of jacks and the contact reliability degradation of electrical connectors. The comprehensive effect of the temperature difference and temperature change rate on the performance degradation of electrical connectors depends on the “confrontation” between slip line density and slip direction number.

Key words: aerocraft instrument and equipment, aviation electrical connector, thermal fatigue, stress relaxation, metallographic analysis, failure mechanism, performance degradation

中图分类号:

骆燕燕, 刘旭阳，郝杰，王振, 刘磊，林小明. 航空电连接器热疲劳失效机理研究[J]. 兵工学报, 2016, 37(7): 1266-1274.

LUO Yan-yan, LIU Xu-yang, HAO Jie, WANG Zhen, LIU Lei, LIN Xiao-ming. Research on Thermal Fatigue Failure Mechanism of Aviation Electrical Connectors[J]. Acta Armamentarii, 2016, 37(7): 1266-1274.

参考文献

［1］朱海峰.环境应力作用下航天电连接器可靠性试验方案研究[D]. 杭州：浙江大学，2002.
ZHU Hai-feng. Research on electrical connector reliability test plan under environment stresses[D]. Hangzhou: Zhejiang University, 2002. (in Chinese)
[2］ Angadi S V, Wilson W E, Jackson R L. A multi-physics finite element model of an electrical connector considering rough surface contact[C]∥Proceedings of the 54th IEEE Holm Conference on Electrical Contacts. Orlando, US: IEEE, 2008:168-177.
[3］ Liao K C, Chiu W C.Investigation of relaxation behavior for terminals of CPU socket connectors [C]∥Proceedings of the 54th IEEE Holm Conference on Electrical Contacts. Orlando, US: IEEE, 2008:74-77.
[4］ Ibrahim R D, George T F. Modeling and analysis of a blade/receptacle pair for the prediction of thermal cycling and temperature dependent vibration driven fretting corrosion [C]∥Proceedings of the 56th IEEE Holm Conference on Electrical Contacts.Charleston, US: IEEE, 2010:42-48.
[5］钱萍，陈文华，高亮.航天电连接器综合应力可靠性统计模型的验证[J].中国机械工程，2011，22(3):257-259．
QIAN Ping, CHEN Wen-hua, GAO Liang. Reliability statistical model verification of aerospace electrical connectors under multiple stresses [J]. China Mechanical Engineering, 2011, 22(3): 257-259. (in Chinese)
[6］潘骏，刘红杰，陈文华，等．航天电连接器步进应力加速寿命试验研究[J].机电工程，2011,28(2):171-175．
PAN Jun, LIU Hong-jie, CHEN Wen-hua, et al. Research onstep-up-stress accelerated life test of aerospace electrical connectors [J]. Journal of Mechanical and Electrical Engineering, 2011, 28(2): 171-175. (in Chinese)
[7］靳哲峰.环境综合应力作用下航天电连接器可靠性分析与建模[D].杭州：浙江大学，2003．
JIN Zhe-feng. Failure analysis and reliability modeling for electrical connectors under the action of combined environment stress [D]. Hangzhou: Zhejiang University, 2003. (in Chinese)
[8］陈文华．航天电连接器可靠性试验和分析的研究[D].杭州：浙江大学，1997．
CHEN Wen-hua.Research on electrical connector reliability test and analysis[D]. Hangzhou: Zhejiang University, 1997. (in Chinese)
[9］ Lücke N, Grossmann S, Lbl H, et al. Long-term behaviour of plug-in connectors with copper Beryllium contact lamellas depending on stress relaxation[C]∥Proceedings of the 56th IEEE Holm Conference on Electrical Contacts. Charleston, US: IEEE, 2010: 537-542.
[10］ Essone-Obame H, Cretinon L, El Abdi R, et al. Spring stiffness investigations for long lifetime connectors[C]∥Proceedings of the 55th IEEE Holm Conference on Electrical Contacts. Piscataway, NJ, US: IEEE, 2009: 212-217.
[11］ Manson S S. Behavior of materials under conditions of thermal stress[J]. Physica E: Low-dimensional Systems and Nanostructures, 1953, 7(S3/S4):661-665.
[12］ Coffin L F. A study on the effect of cyclic thermal stresses on a ductile metal [J]. Transaction of American Society of Mechanical Engineering, 1954, 76: 931-950.
[13］胡光举.核主泵主轴表面热疲劳分析[D].长春：吉林大学，2009.
HU Guang-ju.Thermal fatigue analysis of main shaft of nuclear main pump [D].Changchun: Jilin University, 2009. (in Chinese)
[14］陈永昌.热疲劳损伤的超声无损评价[D].大连：大连理工大学，2009.
CHEN Yong-chang.Ultrasonic nondestructive evaluation of thermal fatigue damage [D]. Dalian: Dalian University of Technology, 2009. (in Chinese)
[15］张菊华，孔宪宝．低频电连接器失效模式的分析[J]．机电元件，1989，9(1): 36-43．
ZHANG Ju-hua, KONG Xian-bao. Analysis of failure modes of low frequency electrical connectors[J]. Electromechanical Components, 1989, 9(1): 36-43. (in Chinese)
[16］ GB/T 2423.22—2002 电工电子产品环境试验第2部分：试验方法试验N：温度变化[S].北京：中国标准出版社，2002:455-457.
GB/T 2423.22—2002 Environmental testing for electric and electronic products—part 2: test methods—test N: change of temperature [S]. Beijing: Standards Press of China, 2002: 455-457. (in Chinese)
[17］ GB/T 2424.13—2002 电工电子产品环境试验第2部分：试验方法温度变化试验导则[S].北京：中国标准出版社，2002: 1-4.
GB/T 2423.13—2002 Environmental testing for electric and electronic products—part 2: test methods—guidance on change of temperature tests [S]. Beijing: Standards Press of China, 2002: 1-4. (in Chinese)
[18］ GJB1216—1991 电连接器接触件总规范[S].北京：国防科学技术工业委员会，1991.
GJB1216—1991 General specification for electrical connector contacts[S]. Beijing: the Commission of Science, Technology and Industry for National Defense, 1991. (in Chinese)
[19］韩增祥.金属热疲劳试验方法的探索[J].理化检验：物理分册，2008，44(5): 250-257.
HAN Zeng-xiang. Exploration of testing method for thermal fatigue of metal [J].Physical Testing and Chemical Analysis: Part A: Physical Testing, 2008, 44(5): 250-257. (in Chinese)
[20］ GJB1217—1991 电连接器试验方法[S].北京：国防科学技术工业委员会，1991.
GJB1217—1991 Test methods for electrical connectors[S]. Beijing:the Commission of Science, Technology and Industry for National Defense, 1991. (in Chinese)
[21］ GB/T2423.01—2008 电工电子产品环境试验第2部分：试验方法试验A：低温[S]. 北京：中国标准出版社，2008.
GB/T2423.01—2008 Environmental testing for electric and electronic products—part 2: test methods—tests A: low temperature [S]. Beijing: Standards Press of China, 2008. (in Chinese)
[22］ GB/T2423.02—2008 电工电子产品环境试验第2部分：试验方法试验B：高温[S]. 北京：中国标准出版社，2008.
GB/T2423.02—2008 Environmental testing for electric and lectronic products—part 2: test methods—tests B: dry heat [S]. Beijing: Standards Press of China, 2008. (in Chinese)
[23］郭青蔚，王桂生，郭庚辰.常用有色金属二元合金相图集[M]. 北京：化学工业出版社，2010:68.
GUO Qing-wei, WANG Gui-sheng, GUO Geng-chen. Commonly used non-ferrous metal binary alloy metallograph [M]. Beijing: Chemical Industry Press, 2010: 68. (in Chinese)
[24］刘平，任凤章，贾淑果.铜合金及其应用[M].北京：化学工业出版社，2010: 73-84.
LIU Ping, REN Feng-zhang, JIA Shu-guo. Copper alloy and its application [M].Beijing: Chemical Industry Press, 2007: 73-84. (in Chinese)
[25］戴起勋.金属材料学[M].北京：化学工业出版社，2011.
DAI Qi-xun. Metal materials science[M]. Beijing: Chemical Industry Press, 2011. (in Chinese)
[26］胡庚祥，蔡珣，戎永华.材料科学基础[M].上海交通大学出版社，2011.
HU Geng-xiang, CAI Xun, RONG Yong-hua. Material science foundation [M]. Shanghai: Shanghai Jiao Tong University Press, 2011. (in Chinese)

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