铝合金铆接结构高温热暴露强度影响研究  

STUDY ON THE STRENGTH OF ALUMINUM ALLOY RIVETED STRUCTURE AFTER HIGH TEMPERATURE THERMAL EXPOSURE

作　　者：何志全[1,2] 聂宏[1] 魏小辉[1] 陈天浪[2] 文丽鑫 HE ZhiQuan;NIE Hong;WEI XiaoHui;CHEN TianLang;WEN LiXin(College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Shanghai Aircraft Design and Research Institute,Shanghai 201210,China)

机构地区：[1]南京航空航天大学航空学院,南京210016 [2]上海飞机设计研究院,上海201210

出　　处：《机械强度》2024年第6期1325-1332,共8页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(52275114)资助。

摘　　要：针对高温热暴露对飞机常用铝合金铆接结构强度性能的影响,以2024-T3板材和NAS1097KE5铆钉组成的连接件为对象,开展室温、高温以及高温热暴露后的有限元分析和试验研究。材料非线性和高温性能衰减的精细有限元模型可以准确地模拟该类铝合金铆接结构在室温和不同高温热暴露环境下的强度性能,得出的分析结果与试验结果的差异不超过5%;基于有限元分析拟合的公式对高温热暴露状态下连接强度的预测结果与试验结果的误差不超过4%,经过保守性修正后可应用于工程实际。所建立的高温热暴露状态下铝合金铆接结构连接强度的计算方法可推广到其他类似结构。Focus on the influence of high-temperature and thermal exposure on the strength of the aluminum alloy riveted structure commonly used in aircraft,finite element analysis(FEA)and test research are carried out with joints composed of 2024-T3 sheets and NAS1097KE5 rivets in room temperature,high temperature and thermal exposure.The detail FEA which consider of material nonlinearity and properties attention after high temperature and thermal exposure,results in a good agreement with tests,which the differences are less than 5%.The formed finite element method(FEM)can accurately simulate the strength performance of this type of aluminum alloy riveted structure in the environments of room temperature,high-temperature and thermal exposure.The differences of joint strength after thermal exposure between test results and formulas prediction fitting from FEA analysis are less than 4%.After conservative revision,the formulas can be applied to engineering practice.The established joint strength calculation method of aluminum alloy riveted structure under high-temperature and thermal exposure can be extended to other similar structures.

关 键 词：铝合金 铆接 高温 热暴露 强度 试验 有限元分析 

分 类 号：V215.4[航空宇航科学与技术—航空宇航推进理论与工程]