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为研究工业纯钛(TA1)和铜合金(H62)及铝合金(AA5052)自冲铆连接(SPR)的可行性,对其自冲铆接头进行拉伸-剪切试验,运用扫描电镜对接头断口进行微观分析,探究其静态失效机理,并基于有限元分析软件ANSYS/LS-DYNA建立自冲铆连接过程的二维轴对称模型进行模拟。结果表明:SPR技术可实现H62-TA1和TA1-AA5052异种板材的有效连接,SPR试验和模拟具有良好的一致性;H62-TA1接头破坏模式为铆钉拉出,从微观角度分析可知上板不同位置出现不同程度被摩擦的痕迹,下板为韧性断裂;TA1-AA5052接头破坏模式为下板拉断,从微观角度分析其断口特征为韧性断裂。
In order to study the feasibility of self-piercing riveted connection (SPR) of industrial pure titanium (TA1) and copper alloy (H62) and aluminum alloy (AA5052), the self-piercing riveting joint was subjected to tensile-shear test. The microstructure of the fracture was analyzed microscopically and its static failure mechanism was explored. Based on the finite element analysis software ANSYS / LS-DYNA, a two-dimensional axisymmetric model of self-piercing riveting process was established. The results show that SPR can effectively connect dissimilar plates of H62-TA1 and TA1-AA5052, and SPR test and simulation have good consistency. The failure mode of H62-TA1 joint is pulled out by rivets. From the microscopic point of view, There are traces of friction to varying degrees, the lower plate is ductile fracture; TA1-AA5052 joint failure mode for the lower plate pulled off from the microscopic point of view of its fracture characteristics of ductile fracture.