中国机械工程2018，Vol.29Issue(3)：333-339,7.DOI:10.3969/j.issn.1004-132X.2018.03.013
航空电连接器热循环试验与寿命预测
Thermal Cycling Test and Life Prediction of Aviation Electrical Connectors
摘要
Abstract
Through the accelerated life tests and analyses,the reliability and life prediction method of aviation electrical connectors was studied under thermal cycling conditions.A thermal cycling accelerated test scheme for simulating diurnal temperature differences was proposed,including experiments and circuit designs.The strains of jacks in the period of stable high temperature during the tests were used as the main monitoring parameters indicating the performance degradation processes of aviation electrical connectors.The accelerated thermal cycling tests were carried out and the performance degradation laws of aviation electrical connectors induced by stress relaxation were analyzed.The critical strain values for the failure of aviation electrical connectors were derived theoretically.And the gray model,time series model and neural network based time series model were adopted in the life prediction of aviation electrical connectors under thermal cycling conditions.The results show that the strain decreases with the increases of the numbers of thermal cycles.And the larger the temperature differences,the more the strain reduction is,the more obviously the stress relaxation phenomenon shows,the faster the performance degrades and the shorter the service life is.The thermal cycling life is approximately exponential attenuation with the increases of temperature differences.关键词
电连接器/热循环试验/寿命预测/应变量Key words
electrical connector/thermal cycling test/life prediction/strain分类
信息技术与安全科学引用本文复制引用
骆燕燕,马旋,李晓宁,王振..航空电连接器热循环试验与寿命预测[J].中国机械工程,2018,29(3):333-339,7.基金项目
国家自然科学基资助金项目(51107028) （51107028）
河北省高等学校创新团队领军人才培育计划资助项目(LJRC003) （LJRC003）
