摘要
为探究非金属材料作为自冲铆接头夹层的力学性能,选取1.5 mm的5052铝镁合金为上下基板,分别以厚度为1mm的CFRP、1 mm的PC及0.1 mm的PET为夹层材料制备单搭式自冲铆接头,对各组接头沿子午线剖面进行成形质量评价,用MTS电液伺服材料试验平台对接头进行拉伸-剪切试验,分析最大破坏载荷与能量吸收值,对接头破坏位置进行SEM电镜扫描,分析其破坏形式。结果表明:自冲铆接技术可对非金属夹层三明治结构进行有效连接,接头破坏形式均为铆钉拉脱、铆扣结构破坏、内壁刮痕;夹层材料为PC板时,接头内锁结构更好,其破坏载荷及能量吸收值均优于以CFRP、PET为夹层材料的三明治结构自冲铆接头。
In order to explore the mechanical properties of non-metallic materials as self-piercing riveting joints,1.5 mm 5052 aluminum-magnesium alloy was selected as the upper and lower substrates,and 1 mm CFRP,1 mm PC and 0.1 mm PET were used as inter-layer materials to prepare single layer. The self-piercing riveting joint was used to evaluate the forming quality of each joint along the meridian section. The MTS servo material test platform was used to carry out the tensile-shear test on the joint,and the maximum breaking load and energy absorption value were analyzed,and the joint failure position was performed.SEM electron microscopy was used to analyze the failure mode. The results show that the self-piercing riveting technology can effectively connect the non-metal sandwich structure,the joint failure form is the rivet pull-off,the rivet structure is destroyed,and the inner wall is scratched too. When the sandwich material is PC board,the joint with better internal locking structure,the failure load and energy absorption value are better than the sandwich structure self-piercing riveting joint with CFRP and PET as the sandwich material.
作者
卢嘉伟
何晓聪
邓聪
魏文杰
LU Jiawei;HE Xiaocong;DENG Cong;WEI Wenjie(Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650500, China)
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2019年第4期28-31,共4页
Ordnance Material Science and Engineering
基金
国家自然科学基金(51565023)
云南省教育厅科学研究基金重大专项项目(ZD201504)
