Penetration Resistance Performance Test and Numerical Simulation of Polyurea/Metal Composite Structures
HE Chenglong1,2,†, *, PU Yanrong1,†, HUANG Zhixin1, HUO Ziyi1, YANG Kexu1, MAO Xiang1, JIA Song1
1 College of Mechatronic Engineering, North University of China, Taiyuan 030051, China 2 Shanxi Key Laboratory of High-end Equipment Reliability Technology, North University of China, Taiyuan 030051, China
Abstract: This paper investigates the enhancement effect of polyurea coating on the impact resistance of 2024 aluminium sheet against fragmentation, and analyses the effect of the thickness and relative position of the sprayed polyurea on the impact resistance of the composite sheet by loa-ding spherical fragments into different polyurea-coated composite structures through ballistic tests. A numerical model of aluminium/polyurea anti-invasion and penetration was established by using finite element software ABAQUS/Explicit to further investigate the influence law of the incident angle on the ricochet phenomenon and the damage morphology of the composite plate. The results show that the protective performance of the composite plate is more significantly improved when the surface is coated with a polyurea layer;the optimal thickness of the polyurea coating is 2—5 mm and the protective performance is better under low velocity penetration. The angle of incidence has a significant effect on the impact resis-tance of the polyurea layer, 30° when the composite plate has the highest energy-absorbing efficiency, while 60° is prone to cause ricochet resulting in a decrease in energy-absorbing efficiency. Increasing the thickness of the former polyurea increases the impact resistance of the composite panel, but reduces the kinetic energy of impact absorbed per unit of surface density, thus reducing the energy absorption efficiency of the composite panel.
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2026, Vol. 40 
