铝-铜合金异质材料复合搭接自冲铆性能研究  

Study on the Performance of Self-piercing Riveting for Composite Lap of Aluminum-copper Alloy Dissimilar Sheet Materials

作　　者：邓成江[1] 何晓聪[1] 王玉奇[1] 周森[1] 

机构地区：[1]昆明理工大学机电工程学院,昆明650500

出　　处：《机械科学与技术》2014年第10期1574-1578,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50965009);昆明理工大学分析测试基金项目(2011489)资助

摘　　要：通过试验方法研究不同刺穿方向下铝合金和铜合金(简称Al-Cu)组合的自冲铆(SPR)接头的力学性能,并进行材料性能测试。对Cu-Cu的SPR接头进行铆接试验和有限元模拟以分析其可成形性。对不同刺穿方向下Al和Cu组合的SPR接头进行力学性能测试,获得其载荷-位移曲线。结果表明:SPR接头抗拉伸剪切强度高于抗剥离强度;Cu-Cu接头强度最高,Cu-Al次之,Al-Cu最小。拉伸剪切条件下,内锁结构决定接头力学性能,失效模式均为铆钉从下板中被拉出;剥离条件下,内锁结构和板材特性决定接头力学性能,上板强度较小时,铆钉从上板铆孔处脱离;下板强度较小时,铆钉脱离下板;上、下板强度较高且接近时,铆钉脱离下板。The mechanical performance of self-piercing riveted （SPR） joint in aluminum and copper alloy （A1-Cu） sheets with different piercing directions is investigated experimentally, and the material properties are tested. The formability of SPR Cu-Cu joint is analyzed by riveting experiment and finite element analysis. The mechanical performances of SPR joints in A1-Cu with different piercing directions are tested, and the load-displacement curves are obtained. The result show that the tensile-shear strength of SPR joint is higher than its peel strength. The strength of Cu- Cu joint is the highest, Cu-A1 joint is the secondary and the A1-Cu joint is the smallest. Under the tensile-shear condition, the mechanical performance of the joint is determined by the structure of interlock, the failure mode is the rivet pull-out from the lower sheet. Under the peel condition, the mechanical performance of joint is determined by the structure of interlock and the behavior of sheet material. If the strength of upper sheet is smaller, the rivet is pulled out from riveting hole on the upper sheet. If the strength of lower sheet is smaller, the rivet is pulled out from the lower sheet. If the strengthes of upper and lower sheets are big and identical, the rivet is also pulled out from the lower sheet.

关 键 词：自冲铆 强度 异质材料 失效模式 

分 类 号：TH131.1[机械工程—机械制造及自动化]