1420铝锂合金同种异种自冲铆单搭接头力学性能  

Mechanical Properties of Single-Lap Self-Pierce Riveted Joints in Similar and Dissimilar Sheets About 1420 Aluminum-Lithium Alloys

作　　者：程强[1] 何晓聪[1] 张先炼[1] 卢毅[1] 

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《宇航材料工艺》2016年第1期85-90,共6页Aerospace Materials & Technology

基　　金：国家自然科学基金(50965009);昆明理工大学分析测试基金项目(20150507)

摘　　要：为探究1420铝锂合金自冲铆接头的力学性能,本文采用自冲铆连接设备对1420铝锂合金(AL1420)同种及其与铜合金(H62)异种板材组合进行铆接,并通过拉伸-剪切试验测试接头的力学性能,运用SPSS数据分析软件对接头的最大载荷和最大位移量进行分析。结果表明:AL1420-AL1420和AL1420-H62两种接头的失效形式皆为铆钉从下板拉脱,铆钉头与上板接触区域出现不同程度撕裂;H62-AL1420接头除铆钉从下板拉脱,铆钉头与下板接触区域仅出现凹陷。AL1420-AL1420接头最大载荷最高(6 026.8 N),能量吸收性能最好(16.84 J)。对于异种板材组合,H62-AL1420接头的最大载荷(5 304.0 N)大于AL1420-H62接头(5 229.3 N),AL1420-H62接头的能量吸收值(16.79 J)大于H62-AL1420接头(15.08 J),异种板材铆接时则优先采用能量吸收性能较好的AL1420-H62搭接形式。To study the mechanical properties of the self-piercing riveted joints about 1420 aluminum-lithium alloys,the equipment of self-piercing riveting was applied to join 1420 aluminum-lithium alloys（ AL1420） with itself and copper alloys（ H62）. Tensile-shear tests was used to test mechanical properties of self-pierce riveted joints and SPSS was utilized to analyze the maximum loads and maximum displacements of joints. The results show that the rivets of AL1420- AL1420 joint and AL1420- H62 joint are pulled out from lower sheet,and the location in upper sheet contacted with the head of rivet has different tear. The rivet of H62- AL1420 joint is pulled out from lower sheet also,but the upper sheet merely has some indentation. The mean value of maximum loads of AL1420- AL1420 joint（ 6026. 8 N） is supreme among these joints,and the energy absorption value of the AL1420- AL1420 joint（ 16. 84 J） is greaten than the two other joints. For the dissimilar metal sheet combinations,the mean value of maximum loads of H62- AL1420 joint（ 5 304. 0 N） is superior to the AL1420- H62 joint（ 5 229. 3 N）,and the energy absorption value of the AL1420- H62 joint（ 16. 79 J） is higher than the H62- AL1420 joint（ 15. 08 J）. For the combinations of dissimilar sheets,the joints of AL1420- H62 is a better choice for its higher energy absorption value.

关 键 词：自冲铆 工艺参数 1420铝锂合金 失效形式 能量吸收 

分 类 号：TH131.1[机械工程—机械制造及自动化]