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采用自冲铆接技术(SPR)对厚度1.5 mm的钛合金(TA1)与1420铝锂合金(1420)以及铜合金(H62)异种板材组合进行了连接试验,并对制成的单搭和T型接头进行了剪切与剥离试验,分析了各组接头的失效模式以及静力学性能。结果表明:单搭接头组的静失效载荷均值明显高于T型接头组,但前者的能量吸收均值小于后者,接头形式及失效模式对能量吸收值有很大影响;TA1钛合金异种自冲铆接头拉伸剪切的失效模式取决于塑性变形后铆钉脚的强度、铆扣强度及下板接头处的材料强度。
The connection experiments were carried out on self-piercing riveting technology (SPR) for the combination of different thickness of 1.5 mm thick titanium alloy (TA1) with 1420 Al-Li alloy (1420) and copper alloy (H62) The joints were sheared and peeled off, and the failure modes and static mechanical properties of the joints were analyzed. The results show that the mean static failure load of the single-lap joint group is significantly higher than that of the T-joint group, but the energy absorption mean value of the former is smaller than the latter, and the joint form and failure mode have a great influence on the energy absorption value. Riveting joint tensile shear failure mode depends on the plastic deformation of rivet legs after the strength, riveting buckle strength and material strength at the lower plate joints.