文献类型：期刊文献

英文题名：Experimental and numerical studies of stress/strain characteristics in riveted aircraft lap joints

作者：Zeng, Chao Tian, Wei Liu, Xiang Yao Xue, Jiu Tian

第一作者：曾超

通信作者：Zeng, C[1]|[14440168ac4bb1062555d]曾超;[144405c65b68e73633c3d]曾超;

机构：[1]Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550003, Peoples R China;[2]Nanjing Univ Aeronaut & Astronaut, Coll Mech & Elect Engn, Nanjing 210016, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Aerosp Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2019

卷号：33

期号：7

起止页码：3245-3255

外文期刊名：JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20192907187750);Scopus(收录号：2-s2.0-85068791723);WOS:【SCI-EXPANDED(收录号:WOS:000484746000020)】；

基金：This work was partially supported by the National Natural Science Foundation of China (Grant No. 51575273) and the Specific Funds for Integrated Military-Civilian Development from Guizhou Institute of Technology (Grant No. KJZX17-011) and Natural Science Foundation of Guizhou Province (Grant No. 20161065).

语种：英文

外文关键词：Residual stress; Strain; Lap joint; Riveting; Fatigue life

摘要：The fatigue property of riveted lap joint is greatly related to the riveting-induced residual stress, especially the stress distribution on the faying surface. However, an accurate study of the residual stress characteristics in the riveted sheet could be very difficult. In this paper, both numerical and experimental investigations were carried out on the stress/strain characteristics in riveted aircraft lap joints. A special specimen was designed for the test of strain variations on the faying surface of the sheet by microstrain gages. For the numerical simulation, the rivet squeezing process was analyzed using the explicit dynamic finite element (FE) method, whilst a general static FE analysis was employed for the elastic springback after the squeeze force was removed. A comparison of the strain variations between the experimental results and FE simulations shows a general good agreement, although there may be some difference for points measured near the hole surface. The FE analysis reveals that both compressive and tensile residual stresses could be introduced in the riveted sheet. Massive compressive residual stress can be created in the near-surface layer of the hole. However, the stress level is not always increased with increasing the squeeze force, and so is the improvement of fatigue life observed. Further study is still necessary to account for the fatigue life decreasing effect caused by a high squeeze force.