Test and Numerical Simulation of Penetration Resistance of Polyurea/fiber Composite Structures

doi:10.12382/bgxb.2024.0709

Abstract

Abstract:

In order to enhance and test the fragment penetration resistance of the material structure,the polyurea/aramid fiber aluminum alloy composite protection structure was constructed by spraying polyurea technology with polyurea, aramid fiber and 2024-T351 aluminum alloy materials,and the mechanical properties of polyurea are measured and analyzed. By comparing the protection properties of composite materials under different coating thicknesses and methods,the ballistic limit velocity of different protection structures were obtained,and the failure modes and mechanisms of materials were analyzed.The relationship between coating thickness and protection effect was further studied,and the optimal coating thickness ratio was determined. The results show that the local damage degree of aluminum alloy composite plate coated with 2mm polyurea/2mm aramid fiber is small. The ballistic limit velocity of the coated composite target plate is increased by 96m/s and the protective effect is increased by 36.64% compared with the uncoated condition. The thickness of the protective coating has limited effect on the ballistic limit velocity. Considering the surface density and material strength,the numerical simulation results show that the optimal thickness of polyurea/aramid fiber coating is 4mm to 6 mm,and the optimal thickness ratio is 6:4 ratio of polyurea to aramid fiber for the fragmentation resistance of 4mm aluminum alloy plate.

Key words: polyurea, aramid fiber, mechanical property, ballistic limit velocity, numerical simulation

CLC Number:

TB333

GONG Xiaohui, RAO Guoning, ZHOU Rudong, ZHU Xiaofeng, KONG Decheng, MENG Chenyu. Test and Numerical Simulation of Penetration Resistance of Polyurea/fiber Composite Structures[J]. Acta Armamentarii, 2025, 46(7): 240709-.

Figures/Tables 25

References 29

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参数	数值
密度ρ/(g·cm^-3)	1.1
弹性模量/MPa	509
泊松比	0.41
屈服强度/MPa	7
拉伸强度/MPa	43.1
断裂伸长率/%	270
撕裂强度/(N·mm^-1)	122
硬度/HD	65

参数	数值
密度ρ/(g·cm^-3)	1.1
弹性模量/MPa	509
泊松比	0.41
屈服强度/MPa	7
拉伸强度/MPa	43.1
断裂伸长率/%	270
撕裂强度/(N·mm^-1)	122
硬度/HD	65

工况	靶板结构	涂覆方式	底材厚度/ mm	纤维/ mm	聚脲厚度/ mm	靶板厚度/ mm	质量/kg	v₅₀/ (m·s^-1)	防护效果/ %
1	X-1	无涂覆	4			4	1.746	262
2	X-2	无涂覆				8	3.492	308	17.55
3	A-1	迎弹面涂覆聚脲			2	6	1.993	319	21.75
4	A-2	迎弹面涂覆聚脲			4	8	2.454	327	24.81
5	AB-1	迎弹面涂覆聚脲/纤维		2	2	8	2.485	358	36.64
6	AB-2	迎弹面涂覆多层聚脲/纤维		4		8	2.778	321	22.52

工况	靶板结构	涂覆方式	底材厚度/ mm	纤维/ mm	聚脲厚度/ mm	靶板厚度/ mm	质量/kg	v₅₀/ (m·s^-1)	防护效果/ %
1	X-1	无涂覆	4			4	1.746	262
2	X-2	无涂覆				8	3.492	308	17.55
3	A-1	迎弹面涂覆聚脲			2	6	1.993	319	21.75
4	A-2	迎弹面涂覆聚脲			4	8	2.454	327	24.81
5	AB-1	迎弹面涂覆聚脲/纤维		2	2	8	2.485	358	36.64
6	AB-2	迎弹面涂覆多层聚脲/纤维		4		8	2.778	321	22.52

靶板结构	迎弹面	背弹面
X-1
X-2
A-1
A-2
AB-1
AB-1
AB-2