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Failure Analysis and Reliability Modeling for Electrical Connectors under the Action of Combined Environment Stresses

Author: JinZheFeng
Tutor: ChenWenHua；LuXianBiao；LiLiXin
School: Zhejiang University
Course: Mechanical Design and Theory
Keywords: The electrical connector Environmental stresses Failure Analysis Statistical model
CLC: V442
Type: Master's thesis
Year: 2003
Downloads: 403
Quote: 0
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Abstract

As the research object to Y11X series round electrical connector, electrical connector failure mode, failure mechanisms and reliability modeling systems, in-depth research. First, the history and current status of the development of reliability research at home and abroad;, failure physical analysis and reliability modeling, as well as aerospace electrical connector reliability study of the current situation and existing problems of reliability test methods and trends review and comment. Secondly, the statistics and analysis of the failure of the on-site testing ground for electrical connectors, summed up the electrical connectors, four major failure modes: electric contact failure, insulation failure, mechanical connection failure and other failure, and electrical connectors fault tree analysis, electrical contact failure is the failure of the main form of the electrical connector, and under normal working conditions, causing electrical contact failure, i.e. to determine the main reason for the working life of the electrical connector is the growth of the oxide film layer, the contact of wear, and wear the accumulation of corrosion products, and the impact of the growth of the oxide film, contact a major factor in the accumulation of wear and abrasion of corrosion environmental vibration and temperature stress, the failure mechanism analysis laid the foundation for the electrical connectors. Third, the analysis of the failure mechanism of the electrical connector of the temperature stress; by the structure of the electrical connector and the electrical connector, the dynamic characteristics of the vibrational stress analysis, discusses the electrical connector of the vibrational stress. failure mechanism; by electrical connectors environment temperature, under the combined effects of vibration stress failure analysis to determine the failure mechanism fretting wear, combined the fretting graph theory FRETTINGATTACK analysis, the reliability of the electrical connectors modeling provides the basis. Fourth, in the basis of the failure mechanism of the electrical connector, to establish a model of contact resistance, pointed out that the electrical connector in the process of fretting wear of contact with the surface oxide film on the contact resistance; respectively establish the electrical connector Physics of Failure temperature stress and vibration stress alone and the combined effect of the equation; same time, the combination of the theory of probability and statistics to determine the probability of a of Electrical Connectors life under temperature and vibration stress distribution type, in order to establish the electrical connection the reliability of the statistical model, and laid the foundation for the electrical connector reliability test program to develop and test statistics. Finally, a summary of the full text content, and pointed out the need to further study the contents of the reliability test and analysis of electrical connectors and the Fund subject taking the next step.

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