Research On Accelerated Life Test Optimum Design Of Electrical Connectors Under Multiple Stresses

In this dissertation, the model Y1 1X-1419 electrical connector was taken as the object, under temperature and vibration stresses, the failure mechanism has been analyzed, the Reliability Model has been built. Based on above, the Accelerated Life Test Optimum Design Model of electrical connectors has been attained, and the Simulated Evaluation on the Optimum Model has been done.Firstly, briefly stated the developing history and current situation of Reliability Engineering, introduced the Reliability Test Methods and developing trends. Moreover, the electrical connectors' reliability research's current situation and existing problems, and the existing problems on reliability test plan optimum design were presented.Secondly, introduced the surface plating technology for electrical connectors in detail, through analyzing the failure mechanism of electrical connectors under temperature and vibration stresses, educed the failure physical equation, according to the structure of the electrical connectors and the regular pattern of the wearing and corrosion products growing process, established the reliability statistical model, laid a foundation for working out electrical connectors reliability test plans.Thirdly, by means of comparing the comprehensive test design, orthogonal design and uniformly design, adapt to the actual requirements of accelerated life test, catch an excellent accelerated life text plan, which make the estimate value have the well precision in normal stress level, at the same time that can reduce the sample number and shorten the test time.Fourthly, built and researched optimizing design model of constant stress accelerated life test plans under the temperature and vibration stresses. Combined with the uniformly orthogonal design, the test plan has been optimized.Fifthly, proposed and researched the evaluation method of accelerated life test plans by simulation. Through comparing and simulating the uniformly orthogonal design plan and comprehensive test plan, proved that the uniformly orthogonal design plan is feasible, and given out the final optimum test plan.Eventually, gave a conclusion to research content of the entire dissertation, and proposed the research content of the reliability test and analysis of electrical connectors, and the research direction of this Foundation project.