复合材料科学与工程Issue(10)：79-86,8.DOI:10.19936/j.cnki.2096-8000.20241028.011
关键紧固件缺失对复合材料翼根长桁连接结构影响
Influence of critical fastener missing on composite wing root stringer joint structure
摘要
Abstract
With the increasing application of composite materials in civil aircraft main bearing structures,study of the failure mode and load transfer rule in critical joint structures such like wing-fuselage joint is being more and more important.However,the research on the main bearing joint structures containing damage is still insufficient.As a potential critical failure mode,the study of fastener missing is of great significance to further understand the mechanical performance of composite wing root joint structure and ensure the safety of civil aircraft structure.Taking the stringer joint structure in composite wing root of civil aircraft as the research object,the intact specimen and specimen with critical fastener missing were designed and manufactured respectively.The influence of critical fasten-er missing on specimen stiffness,strain distribution and bolt load distribution was studied by means of test and simu-lation.The results show that after the critical fastener(located at the 1st row)missing,the joint stiffness of wing root is not significantly changed.The values of strain gages located at the 1st row change within 5％,and the values of strain gages located at the 2nd～4th rows near the missing fastener increase significantly,with the maximum of 22.1％,13.4％,9.1％respectively.The loads of bolts located at the 1st～3rd rows near the missing fastener increase significantly,with the maximum of 15％,18％,12％respectively,and the loads of bolts in other locates increase between 5％～10％.The missing of critical fastener has little effect on the load distribution of horizontal T-type fitting and butt plate.关键词
复合材料/翼根连接/长桁对接/紧固件缺失Key words
composite material/wing root joint/stringer joint/fastener missing分类
通用工业技术引用本文复制引用
李星,聂磊,郭瑾,雷安民,高晶晶..关键紧固件缺失对复合材料翼根长桁连接结构影响[J].复合材料科学与工程,2024,(10):79-86,8.基金项目
中国博士后科学基金资助项目(2022M713452) （2022M713452）
