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Evaluating the impact resistance of double-layered aluminum alloy plates with diverse shapes against blunt rigid projectiles

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Abstract

Scholars have studied the impact resistance of flat metal plates quite well. However, the connecting part of the protective end often presents other shapes, and the importance of this part for the protective effect should not be neglected. Therefore, this paper hopes to provide guidance for the lightweight design of the protective end by studying the failure mechanism of the double-layered aluminum alloy combination target plate with different shapes. In this paper, two kinds of aluminum alloys, 1100 and 7075, were firstly selected for the blunt nosed impact test, after which a 3D finite element model was established by using ABAQUS/Explicit software, and the finite element method was used to extend the model of the flat nosed projectile impacting on other shapes of double-layered target plates after verifying its accuracy. The results show that the ballistic limits are 18.56%, 6.67% and 0.43% higher than those of the opposite order for the plane, arched and L-shaped plates, where the front panel is 1100 aluminum alloys and the back panel is 7075 aluminum alloys. For hemispherical shells, however, the same arrangement results in a 10% reduction in the ballistic limit. Therefore, the effect of shape on the impact resistance should be fully considered in the design of protective ends.

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Authors and Affiliations

  1. College of Aeronautical Engineering, Civil Aviation University of China, Dongli District, Tianjin, 300300, People’s Republic of China

    Tiechun Zhang, Zhongshan Wang & Yunfei Deng

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  1. Tiechun Zhang
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  2. Zhongshan Wang
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Correspondence to Zhongshan Wang.

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Zhang, T., Wang, Z. & Deng, Y. Evaluating the impact resistance of double-layered aluminum alloy plates with diverse shapes against blunt rigid projectiles. J Braz. Soc. Mech. Sci. Eng. 46, 350 (2024). https://doi.org/10.1007/s40430-024-04921-y

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