The innovation of traditional machinery manufacturing and the promotion of advanced manufacturing technology are becoming the booster for the sustainable development of automobile industry. This paper aims to propose a promising manufacturing technology driven by electromagnetic impact, which is called as electromagnetic high-speed nailing. In this paper, the connection mechanism and joint performance (e.g., microtopography and mechanical properties) of the aluminum alloy 5052 (Al)/high-strength steel DP590 (HSS) structure were studied using simulation and experiment methods. A two-dimensional axisymmetric model based on mechanical–thermal finite element analysis was proposed to explore the formation process of the joints. Microscopic observations and effective plastic strain field analysis showed that excessive deformation of the Al sheet caused serious damage to the HSS sheet, thereby making the joint more susceptible to failure. Through mechanical properties tests, it was found that the mechanical properties of the joints with different discharge energies varies. Specifically, the joints at the discharge energy of 5.3 kJ had the highest maximum shear load. While the joints at the discharge energy of 5.1 kJ showed higher push-out strength because of the better wrapping and higher interlocking degree.

中文翻译：

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铝/钢结构电磁冲击高速钉过程的数值与实验研究

传统机械制造的创新和先进制造技术的推广正成为汽车工业可持续发展的动力。本文旨在提出一种有前途的受电磁冲击驱动的制造技术，称为电磁高速打钉。本文通过模拟和实验方法研究了铝合金5052（Al）/高强度钢DP590（HSS）结构的连接机理和接头性能（如微观形貌和力学性能）。提出了一种基于机械-热有限元分析的二维轴对称模型，以探讨接头的形成过程。显微镜观察和有效的塑性应变场分析表明，Al板的过度变形会对HSS板造成严重损坏，从而使接头更容易失效。通过机械性能测试，发现具有不同放电能量的接头的机械性能会发生变化。具体而言，在5.3 kJ的放电能量下的接头具有最高的最大剪切负荷。而在5.1 kJ放电能量下的接头由于具有更好的包裹性和更高的互锁度而具有更高的推出强度。能量为5.3 kJ的节理具有最大的最大剪切载荷。而在5.1 kJ放电能量下的接头由于具有更好的包裹性和更高的互锁度而具有更高的推出强度。能量为5.3 kJ的节理具有最大的最大剪切载荷。而在5.1 kJ放电能量下的接头由于具有更好的包裹性和更高的互锁度而具有更高的推出强度。