ABSTRACT

The paper presents experiments and finite element simulations of welded aluminium-alloy 5083-H111 plates under near-field air-blast loadings to examine their dynamic plastic deformation and failure. The material degradation takes place in the heat-affected zone affecting the failure mode of aluminium plates. Five specimens are assessed, one bare plate and four butt-welded plates. The effect of the explosive charge-plate distance and the weld seam on the structural dynamic response is evaluated. The scenario could represent an air blast action on the superstructure of aluminium-alloy vessels. The experimentally obtained deformation and failure shapes of specimens show agreement with the simulations performed by the ABAQUS finite element solver. Moreover, the finite element analysis discusses the structural deformation and rupture process of the welded aluminium alloy plates under air-blast loading and their energy transmission and absorption. The present study reveals the impact behaviour of the welded aluminium plates in contrast to the steel plates.

摘要

本文介绍了焊接铝合金 5083-H111 板在近场鼓风载荷下的实验和有限元模拟，以检查其动态塑性变形和失效。材料退化发生在影响铝板失效模式的热影响区。评估了五个试样，一个裸板和四个对焊板。评估了爆炸装药板距离和焊缝对结构动力响应的影响。该情景可能代表对铝合金容器的上层结构的空气喷射作用。实验获得的试样变形和破坏形状与 ABAQUS 有限元求解器的模拟结果一致。而且，有限元分析讨论了焊接铝合金板在空气冲击载荷作用下的结构变形和断裂过程及其能量传递和吸收。本研究揭示了焊接铝板与钢板相比的冲击行为。