钛合金异种材料单搭自冲铆接头力学性能

为研究钛合金异种材料单搭自冲铆接头的力学性能,本文使用接头剖面直观检测法分析了四种铆接接头的成形质量,先后对铜-钛合金接头(H62-TA1接头)和钛-铝合金接头(TA1-AA5052接头)进行准静态力学性能测试,得到了两种接头的载荷-位移曲线。采用狄克逊准则剔除异常值,并通过变差系数法验证了试验数据的可靠性。研究结果表明:H62-TA1接头质量优于TA1-H62接头,TA1-AA5052接头质量优于AA5052-TA1接头;H62-TA1接头强度(5 177.8 N)高于TA1-AA5052接头(4 296.9 N),H62-TA1接头能量吸收值(21.9 J)大于TA1-AA5052接头(10.2 J);H62-TA1接头失效模式为铆钉拉出失效,TA1-AA5052接头失效模式为下板拉断失效。

Mechanical Properties of Single-Lap Self-Pierce Riveted Jointsin Dissimilar Sheets of Titanium Alloy

In the paper, in order to study mechanical properties of single-lap self-pierce riveted joints in dissimilar
sheets of titanium alloy, the method of cross-section visual verification were applied to analyze the quality of four
joints. The quasi static mechanical properties test was used to test mechanical properties of copper alloy-titanium alloy
joints(H62-TA1 joints) and titanium alloy-aluminum alloy(TA1-AA5052 joints) , and the load-displacement curve
of the two joints was acquired from the test. The Dixon guideline was used to reject abnormal values, and the method
of coefficient of variation was used to verify the reliability of the test data. The results show that the H62-TA1 joint is
superior to the TA1-H62 joint, and the TA1-AA5052 joint is superior to the AA5052-TA1 joint. The strength of the
H62-TA1 joint (5 177. 8 N) is higher than the TA1-AA5052 joint (4 296. 9 N), and the energy absorption value of
the H62-TA1 joint (21. 9 J) is greater than the TA1-AA5052 joint (10. 2 J). The failure mode of the H62-TA1
joint is the rivet being pull out, and the failure mode of theTA1-AA5052 joint is the lower sheet being snapped.