中国机械工程 ›› 2024, Vol. 35 ›› Issue (05): 886-894.DOI: 10.3969/j.issn.1004-132X.2024.05.014

• 可靠性工程应用研究 • 上一篇    下一篇

电连接器用聚氨酯胶密封件贮存可靠性统计模型的加速试验验证与评估

钱萍;陈驰;陈文华;吴山奇;郭明达


  

  1. 浙江理工大学浙江省机电产品可靠性技术研究重点实验室,杭州,310018
  • 出版日期:2024-05-25 发布日期:2024-06-26
  • 作者简介:钱萍, 女, 1983 年生,副教授。研究方向为可靠性试验与统计分析。E-mail: qianping@zstu.edu.cn。
  • 基金资助:
    浙江省重点研发计划(2021C01133)

Accelerated Test Verification and Evaluation of Storage Reliability Statistical Model of Polyurethane Sealing Elements for Electrical Connectors

QIAN Ping;CHEN Chi;CHEN Wenhua;WU Shanqi;GUO Mingda   

  1. Zhejiang Provinces Key Laboratory of Reliability Technology for Mechanical and Electrical Product,
    Zhejiang Sci-Tech University,Hangzhou,310018

  • Online:2024-05-25 Published:2024-06-26

摘要: 针对电连接器用聚氨酯胶密封件在长贮条件下的寿命评估问题,从机理层面分析了聚氨酯胶密封件内聚破坏和边界破坏导致性能下降的原因。依据从机理层面建立的电连接器用聚氨酯胶密封件贮存可靠性统计模型,利用聚氨酯胶密封件温湿度综合应力加速退化试验数据,综合应用粒子群优化算法和回归分析、AD检验及拟合优度等检验方法,从数据统计层面验证了电连接器用聚氨酯胶密封件失效物理方程和退化轨迹模型的合理性。利用扫描电镜和能谱分析验证了失效机理分析的正确性。最后,利用所建模型评估了电连接器用聚氨酯胶密封件在贮存环境下的可靠寿命。

关键词: 电连接器, 密封失效机理, 加速试验, 统计检验, 可靠性评估

Abstract:  In order to address the issues of life evaluation for polyurethane sealing elements used in electrical connectors during prolonged storage conditions, the underlying mechanism behind cohesion failure and boundary failure that contributed to performance degradation of these seals was analyzed. The reliability statistical model of polyurethane sealing elements for electrical connectors, established at the mechanism level, was validated at a statistical level by comprehensively applying particle swarm optimization algorithm and regression analysis, AD test and goodness of fit test methods to the comprehensive stress accelerated degradation data of temperature and humidity on polyurethane sealing elements. The validity of the failure mechanism analysis was confirmed through SEM and EDS techniques. Ultimately, the developed model was employed to assess the reliable lifespan of polyurethane adhesive seals for electrical connectors under the  storage environment.

Key words: electrical connector, seal failure mechanism, accelerated test, statistical test, reliability evaluation

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