多层泡沫铝芯夹层结构对爆炸荷载的结构响应

Manjeet Gupta, G. Tiwari
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引用次数: 0

摘要

本文对闭孔泡沫铝芯夹层板在爆炸荷载作用下的结构响应进行了三维有限元分析。泡沫芯材料采用相对密度为6%、10%和16%的不同层状材料,而顶部和底部面板的材料分别采用铝合金(AA2024 T3)和轧制均质装甲(RHA)钢。面板厚度为3mm,芯材总等效厚度为50mm,夹芯板长、宽均为500mm × 500mm。夹芯板沿面板中心线距离前板350毫米处承受相当于700克TNT的爆炸载荷。通过LS-DYNA软件进行数值研究,在保持堆芯总厚度不变的情况下,改变电荷质量、隔离距离和各层厚度,并通过文献中发现的结果进行验证,发现结果相互接近。探讨了相对密度、超氧化物歧化酶(SOD)、单个泡沫层数和电荷质量等因素对膜结构的影响。结果表明:与密度均匀的单层泡沫板相比,不同密度的泡沫层提高了面板的抗爆性能;
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural Response of Multi-Layered Aluminium Foam Core Sandwich Structure Against Blast Loading
In the present study, three dimensional finite element analysis were carried out to know the structural response of the sandwich panels having closed cell Aluminium foam cored material against blast loading. The foam cored material were used in the form of layers of different Relative Density (R.D.) 6%, 10%, and 16% whereas the material for top and bottom face plate was considered as Aluminium Alloy (AA2024 T3) and Rolled Homogeneous Armour (RHA) steel respectively. The thickness of face plate was kept as 3 mm and total equivalent thickness of core material was considered as 50 mm and the length and breadth of the sandwich panel is 500 mm × 500 mm. The sandwich panel subjected to blast load equivalent to 700 gm. TNT at a stand-off distance of 350 mm from the front plate along the centerline of the panel. The numerical investigation was carried out through LS-DYNA software with varying charge mass, stand-off distance, individual layer thicknesses by keeping total core thickness constant and results were validated through the findings available in the literature and found close to each other. The influence of relative density, Stand-Off Distance (SOD), individual foam layer and mass of charge was explored. Results show that the various layers of foam with different densities improve the blast resistance of panel compared to panel with single layer of foam with uniform density.
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