铝锂合金同异质自冲铆接头静力学性能研究  

Static Properties of Self-Piercing Riveted Joints in Similar or Dissimilar Sheets About Aluminum-Lithium Alloy

作　　者：张先炼[1] 何晓聪[1] 程强[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2期76-79,共4页Aerospace Materials & Technology

基　　金：国家自然科学基金资助项目(51565023;51565022);云南省教育厅科学研究基金重大专项项目(ZD201504)

摘　　要：以1420铝锂合金(AL1420)为载体制备其同质及其与H62铜合金(H62)、Q215镀锌钢(Q215)和TA1工业纯钛(TA1)异质单搭自冲铆接头。通过静力学试验分析各种接头的静失效载荷及能量吸收性能;就其失效模式分析推断其宏观失效机理。结果表明:TA1-AL1420接头静失效载荷最高,Q215-AL1420接头能量吸收性能最强;除TA1-AL1420接头外,其余各组接头失效位移呈现出的大小规律与能量吸收值的高低规律一致。当上下板材屈服强度相差不大时,接头的失效模式均为下板与铆钉分离;相差较大时,主要以屈服强度较低板断裂失效。1420 aluminum-lithium alloy sheets（ AL1420） with itself,H62 copper alloy sheets（ H62）,Q215 galvanized steel sheets（ Q215） and TA1 industrial pure titanium sheets（ TA1） were applied to fabricated different types of single-lap self-piercing riveted joints. The static failure loads and energy absorption properties of the joints were analyzed using the static tests,and the macroscopic failure mechanisms were discussed and inferred based on the failure modes of the joints. The results show that： TA1-AL1420 joints have the highest static failure loads,and Q215-AL1420 joints possess the optimum energy absorption properties; except for TA1-AL1420 joints,the laws of the failure displacements are consistent to those of the energy absorption values for the other type joints. When the gap of the yield strengths between the upper and lower sheets was small,the failure modes of the joints were the lower sheets separated with the rivet; when it was large,the joints mainly failed due to the sheets with lower yield strength fractured.

关 键 词：自冲铆 铝锂合金 静失效载荷 能量吸收 

分 类 号：TH131.1[机械工程—机械制造及自动化]