基于温度循环失效机理的铝制金属密封圈疲劳寿命仿真  

Simulation on Fatigue Life of Aluminum Metal Sealing Ring Based on the Temperature Cycle Failure Mechanism

作　　者：张玮钰 张黎源[1] 张志平[1] 姜正鹤 许忠政 王春雷 刘皋 阳航 冯静 ZHANG Wei-yu;ZHANG Li-yuan;ZHANG Zhi-ping;JIANG Zheng-he;XU Zhong-zheng;WANG Chun-lei;LIU Gao;YANG Hang;FENG Jing(Nuclear Industry Institute of Physical and Chemical Engineering,Tianjin 300000,China;Hunan Gingko Reliability Technology Institute Co.,Ltd,Changsha 400100,China)

机构地区：[1]核工业理化工程研究院,天津300000 [2]湖南银杏可靠性技术研究所有限公司,长沙400100

出　　处：《装备环境工程》2021年第2期120-127,共8页Equipment Environmental Engineering

摘　　要：目的解决真空法兰密封中的金属密封圈寿命难以预测的问题。方法基于金属密封圈的失效机理,提出一种疲劳仿真方法,对金属密封圈的使用寿命进行有效预测。通过有限元仿真方法对金属密封圈安装过程及其使用过程进行仿真模拟,得到金属密封圈使用过程的应力分布,然后结合Conffin-Manson疲劳模型,对金属密封圈的使用寿命进行疲劳仿真,最后设计加速寿命试验,对其仿真结果进行验证。结果疲劳仿真所得的金属密封圈使用疲劳寿命为26915次温度循环,加速寿命试验结果为28401次温度循环,仿真误差为5.23%。结论构建的安装过程和疲劳仿真模型与实际相符。Aiming to solve the problem that the life of metal sealing ring is difficult to predict,this paper proposed a fatigue simulation method to predict the service life of metal sealing ring effectively based on the failure mechanism of metal sealing ring.The metal sealing ring installation process and its service process were simulated by the finite element simulation method to obtain the stress distribution of the metal sealing ring in the service process,and then a fatigue simulation on the service life of the metal sealing ring was conducted based on the Conffin-Manson fatigue model.Lastly,the simulation result was verified by an accelerated life experiment.The simulation results show that the service life of the metal sealing ring obtained from the fatigue simulation is 26,915 temperature cycles,and the accelerated life experimental results is 28,401 temperature cycles,and the simulation error is only 5.23%.Therefore,it can be concluded that the constructed installation process and fatigue simulation models are consistent with the actual situation.

关 键 词：金属密封圈 有限元 疲劳仿真 加速寿命试验 真空 

分 类 号：TH16[机械工程—机械制造及自动化] U463.34[机械工程—车辆工程]