ABSTRACT

The paper presents experiments and finite-element simulations of welded 5083-H116 aluminium alloy panels, quasi-statically punched at the mid-span by a rigid hemispherical indenter, to examine their plastic deformation and fracture resistance. Four specimens are examined: one bare plate, one butt-welded plate and two stiffened plates. The effect of the welding and the influence of stiffeners on the structural impact response are evaluated. The experimental results are presented in terms of the force–displacement responses and collapse modes, showing agreement with the simulations performed by the LS-DYNA finite-element solver. The finite-element analysis discusses the structural behaviour and rupture of the welded aluminium alloy panels under accidental loads, focusing on the welding details and the material degradation in the heat-affected zone.

摘要

本文介绍了用刚性半球形压头在中跨准静态冲压的5083-H116铝合金焊接板的实验和有限元模拟，以检查其塑性变形和抗断裂性能。检查了四个样本：一个裸板，一个对接焊板和两个加劲板。评估了焊接效果和加劲肋对结构冲击响应的影响。实验结果以力-位移响应和坍塌模式表示，与LS-DYNA有限元求解器的仿真结果吻合。有限元分析讨论了在意外载荷下焊接铝合金面板的结构行为和破裂，重点是焊接细节和热影响区的材料降解。