飞行器结构密封胶界面性能表征与失效过程  

Interface Properties Characterization and Failure Process of Structural Sealant of Aircrafts

作　　者：陈鑫 李振威 徐明鸽[1,2] 贺译贤 陶林[1,2] CHEN Xin;LI Zhen-wei;XU Ming-ge;HE Yi-xian;TAO Lin(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;Tianjin Aerospace Reliability Technology Co.,Ltd.,Tianjin 300462,China;School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China)

机构地区：[1]北京强度环境研究所,北京100076 [2]天津航天瑞莱科技有限公司,天津300462 [3]同济大学航空航天与力学学院,上海200092

出　　处：《失效分析与预防》2024年第2期109-116,共8页Failure Analysis and Prevention

基　　金：国家自然基金青年基金(52302108);上海市青年科技英才扬帆计划资助(23YF1448800)。

摘　　要：密封胶是飞行器结构的重要组成部分,是结构密封安全性的基本保障。如果密封胶的性能参数不达标,则可能达不到其设计目标。对新型HM109改性聚硫密封胶进行测试分析,利用有限元软件开展模拟计算,使用Cohesive单元实现对密封胶层的模拟。通过观察胶层失效过程,确定飞行器密封结构在大载荷情况下密封胶层失效的过程;通过对比试验结果和模拟计算结果,验证有限元分析的可靠性。结果表明:试验所测得的参数应用于有限元模拟所得结果与试验结果基本一致,拉伸和剪切模拟最大载荷与试验平均结果误差分别约为3.74%、1.50%,模拟结果具有可靠性。Sealant is an important component of aircraft structures and the basic guarantee of structural seal safety.If the performance parameters of sealant are not up to standard,it’s impossible to achieve the design goal.A new HM109 modified polysulfide sealant was tested and analyzed,and simulation calculation was carried out by finite element simulation software,with Cohesive element used to simulate the sealant layer.By observing the failure process of the sealant layer,the failure process of the sealant layer of aircraft seal structure under heavy load was determined.The reliability of finite element simulation analysis was verified by comparing the test results with the simulation results.The results show that the measured parameters are applied to the finite element simulation,and the simulation results are basically consistent with the test results.The error between the simulated results and the average test results is about 3.74%and 1.5%,and the simulation results are reliable.

关 键 词：密封胶 性能测试 有限元分析 密封失效 

分 类 号：V214.7[航空宇航科学与技术—航空宇航推进理论与工程]