论文部分内容阅读
制备了5052铝合金和8090铝锂合金的同质单搭自冲铆接头和同质单搭粘接-自冲铆复合接头。通过静力学试验获得各组接头的静失效载荷,并计算了各组接头的能量吸收值。分析了各组接头的成形质量及宏观失效机理。结果表明:粘接剂(3MDP100)使5052铝合金自冲铆接头静失效载荷增加了2.30%,使8090铝锂合金自冲铆接头静失效载荷降低了5.37%;粘接剂的使用对接头成形质量影响较大,其相对降低了自冲铆接头的能量吸收值;5052铝合金自冲铆接头的失效模式为下板与铆钉分离;8090铝锂合金自冲铆接头的失效模式为下板与铆钉分离,上板靠近铆钉附近地方发生轻微撕裂且下板出现脱层现象;两种复合接头的失效模式均为下板与铆钉分离以及基板与胶层粘接界面的次价键被破坏。
A homogeneous single-ride self-piercing riveted joint of 5052 aluminum alloy and 8090 aluminum-lithium alloy and a homogeneous single-ride adhesive-self-piercing riveted composite joint were prepared. The static failure load of each group of joints was obtained through statics test, and the energy absorption value of each group of joints was calculated. The forming quality and macroscopic failure mechanism of each group of joints were analyzed. The results show that the static failure load of 5052 aluminum alloy self-piercing rivets increased by 2.30% with the adhesive (3MDP100), and the static failure load of the 8090 aluminum-lithium alloy self-piercing rivets decreased by 5.37%. The use of adhesive formed the joint The impact of the quality is relatively large, which relatively reduces the energy absorption value of the self-piercing riveting joint; the failure mode of the 5052 aluminum self-piercing riveting joint is separating the lower plate from the rivets; the failure mode of the 8090 aluminum lithium alloy self-piercing riveting joint is the lower plate Rivet separation, the upper plate near the rivets slightly tear occurred and the lower delamination phenomenon; the failure modes of the two composite joints are the separation of the lower plate and rivets and substrate and adhesive bonding interface sub-price keys are destroyed.