Analysis of the enhancement effect of UHMWPE backplate thickness on the penetration resistance of aluminum composite panels

YANG Kexu; HE Chenglong; HUO Ziyi; MAO Xiang

doi:10.11883/bzycj-2023-0176

Volume 44 Issue 2

Feb. 2024

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YANG Kexu, HE Chenglong, HUO Ziyi, MAO Xiang. Analysis of the enhancement effect of UHMWPE backplate thickness on the penetration resistance of aluminum composite panels[J]. Explosion And Shock Waves, 2024, 44(2): 023103. doi: 10.11883/bzycj-2023-0176

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YANG Kexu, HE Chenglong, HUO Ziyi, MAO Xiang. Analysis of the enhancement effect of UHMWPE backplate thickness on the penetration resistance of aluminum composite panels[J]. Explosion And Shock Waves, 2024, 44(2): 023103. doi: 10.11883/bzycj-2023-0176

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Analysis of the enhancement effect of UHMWPE backplate thickness on the penetration resistance of aluminum composite panels

doi: 10.11883/bzycj-2023-0176

College of Mechatronics Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 2023-05-15
Rev Recd Date: 2023-11-08

Available Online: 2023-11-15

Publish Date: 2024-02-06

Abstract

Abstract

Ultra-high molecular weight polyethylene (UHMWPE) fibers are widely used in explosive fragment protection due to their high modulus, high strength, and low density. To study the effect of UHMWPE backplate thickness on the penetration resistance effect of aluminum composite panel, the digital image correlation method (DIC) and computed tomography (CT) were used to obtain the dynamic response and local failure of UHMWPE. A finite element model of a tungsten ball penetrating an Al/PE composite plate with different speeds (500, 1000, and 1500 m/s) was established, and the simulated results were found to be in good agreement with the experimental results. The influence of PE backplate thickness on the energy absorption performance and strain of the composite target plate was mainly studied, and the thickness of the backplate was 1.6-20 mm. The results demonstrate that the aluminum plate undergoes adiabatic shear failure under the impact, and the fiber layers are laid orthogonally to produce fiber bulges and bifurcated strain bands under tension. The fiber bulge and cross-shaped strain band bifurcation phenomenon occur when the fragments penetrate the orthogonally laid fibers. With the increase of the PE plate thickness, the main failure of the fiber layers changes from shear failure to tensile failure, and the strain band of the fiber layers changes from cross shape to X shape. Increasing the thickness of the PE plate hinders the movement of the plug body of the aluminum block, thereby increasing the time and kinetic energy consumption of the fragment penetrating the aluminum plate. When the impact velocity is 500, 1000 and 1500 m/s, the optimal areal density absorption energy thickness respectively is 6.4, 12, and 16 mm, and the surface density energy absorption respectively is 14.55, 49.51 and 98.07 J·(kg·m²). The influence of PE composite plate thickness on energy absorption performance first rises rapidly to the threshold and then slowly decreases, this result shows that increasing the PE plate thickness is limited in improving its energy absorption performance after reaching a certain thickness.
- UHMWPE,
- aluminum composite panel,
- tungsten ball impact simulation,
- bullet penetration resistance

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References(27)

References

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