UHMWPE背板厚度对铝复合板抗侵彻增强效应分析

杨可谞; 何成龙; 霍子怡; 毛翔

doi:10.11883/bzycj-2023-0176

UHMWPE背板厚度对铝复合板抗侵彻增强效应分析

doi: 10.11883/bzycj-2023-0176

中北大学机电工程学院，山西太原 030051

基金项目: 山西省自然科学基金面上基金项目（20210302124197）；中国博士后科学基金（2021M702981）

详细信息

作者简介:
杨可谞（1999－　），男，硕士研究生，s202201007@st.nuc.edu.cn

通讯作者:
何成龙（1988－　），男，博士，副教授，hechenglong@nuc.edu.cn

中图分类号: O385; TJ04
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出版历程
- 收稿日期: 2023-05-15
- 修回日期: 2023-11-08
- 网络出版日期: 2023-11-15
- 刊出日期: 2024-02-06

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

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

摘要

摘要: 为研究超高分子聚乙烯（ultra-high molecular weight polyethylene, UHMWPE）背板厚度对铝复合板抗钨球侵彻效果的影响，利用数字图像相关方法（digital image correlation method, DIC）与X射线电子计算机断层扫描（computed tomography, CT）得到UHMWPE受到冲击后的动态响应及局部破坏。建立钨球以不同速度侵彻Al/UHMWPE复合板的有限元模型，研究不同冲击速度下UHMWPE背板厚度对复合靶板吸能性能的影响，所用背板厚度为1.6~20 mm。结果表明：铝板在冲击作用下发生绝热剪切破坏，正交铺设纤维层产生纤维凸起和分叉应变带。随着背板厚度增大，纤维层由剪切破坏向拉伸破坏过度，纤维层应变带由十字形转变为X形。UHMWPE板厚度的增大有效地阻碍了铝块塞体运动，从而增加了破片侵彻铝板的时间与动能消耗。UHMWPE背板厚度对吸能性能影响呈先快速上升至阈值，后缓慢下降的趋势，说明PE板到达一定厚度后，通过增加厚度的方法来提升其吸能性能的作用有限。
- UHMWPE /
- 铝复合板 /
- 抗钨球冲击模拟 /
- 抗侵彻行为
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

HTML全文

图 1 Al/UHMWPE靶板制作流程

Figure 1. Al/UHMWPE target fabrication process

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图 2 实验场地布置

Figure 2. Experimental site layout

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图 3 靶板固定方式与高速相机拍摄示意图

Figure 3. Schematic diagram of target plate fixing method and high-speed camera shooting

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图 4 复合材料靶板数值模型示意图

Figure 4. Schematic diagram of a composite target simulation model

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图 5 子程序分析流程图^[16]

Figure 5. Subroutines analysis flowchart^[16]

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图 6 靶板吸收破片动能的实验和数值模拟结果对比

Figure 6. Comparison between experimental and simulated kinetic energy absorption of the target plate

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图 7 1020和1431 m/s初度破片侵彻下PE复合板DIC分析

Figure 7. DIC analysis of PE composite plate penetrated by fragment at the velocities of 1020 and 1431 m/s

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图 8 1020和1431 m/s初度破片侵彻下Al/UHMWPE复合板应变传播云图

Figure 8. Strain propagation cloud diagrams of Al/UHMWPE composite plate penetrated by fragments with the velocities of 1020 and 1431 m/s

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图 9 1431 m/s初速破片侵彻下Al/UHMWPE复合板中 Mises应力传播云图

Figure 9. Mises stress propagation distribution of Al/UHMWPE composite plate penetrated by the fragment with the velocity of 1431 m/s

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图 10 PE复合板弹孔周围局部破坏

Figure 10. Local destruction around the bullet hole of the PE composite plate

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图 11 贯穿靶板前后应变云图

Figure 11. Runs through the target plate successively strain cloud map

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图 12 破片侵彻过程中动能吸收时程曲线

Figure 12. Kinetic energy absorption history during fragment penetration process

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图 13 破片侵彻过程中的复合板剖面图

Figure 13. Cross-sectional view of the composite panel during fragment penetration

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图 14 500、1000和1500 m/s侵彻速度下靶板的吸能性能与靶板厚度关系

Figure 14. Relation between energy absorption performance of the target plate and its thickness at the penetration velocity of 500, 1000 and 1500 m/s

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表 1 UHMWPE材料参数

Table 1. Material parameters of UHMWPE

ρ/(kg·m⁻³)	E₁₁/MPa	E₂₂/MPa	E₃₃/MPa	ν₁₂	ν₁₃	ν₂₃
970	95000	95000	11300	0.3	0.3	0.4

G₁₂/MPa	G₁₃/MPa	G₂₃/MPa	X_t/MPa	X_c/MPa	Y_t/MPa
6000	6000	3600	3048	1580	130

Y_c/MPa	Z_t/MPa	Z_c/MPa	S₁₂/MPa	S₁₃/MPa	S₂₃/MPa
650	340	180	130	130	130

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表 2 Camanho 折减模型

Table 2. Camanho reduction model

失效模型	折减方法
纤维拉伸失效	$E^{\mathrm{d}}_{11} $=0.07E₁₁
纤维压缩失效	$E^{\mathrm{d}}_{11} $=0.14E₁₁
基体拉伸或剪切失效	$E^{\mathrm{d}}_{22} $=0.2E₂₂，$G^{\mathrm{d}}_{12} $=0.2G₁₂
基体压缩或剪切失效	$E^{\mathrm{d}}_{22} $=0.4E₂₂，$G^{\mathrm{d}}_{12} $=0.4G₁₂

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表 3 侵彻靶板数值模拟与实验数据对比

Table 3. Comparison between simulation and experiment in penetration process

靶板厚度/mm	靶板结构	破片初速/(m·s⁻¹)	破片末速/(m·s⁻¹)		误差/%
靶板厚度/mm	靶板结构	破片初速/(m·s⁻¹)	数值模拟	实验	速度	动能
10.02	Al	1027.49	823.83	844.88	2.5	4.92
10.01	Al	861.67	682.44	658.75	3.6	7.32
10.01	Al	1020.48	822.30	835.62	1.6	3.16
10.01	Al	1283.26	1043.31	1093.19	4.6	8.92
10.00	Al	1091.24	879.88	856.74	2.7	5.47
12.00	Al/UHMWPE	1031.03	815.47	815.51	0.0	0.01
13.30	Al/UHMWPE	1109.26	837.90	882.61	5.1	9.87
14.40	Al/UHMWPE	1015.25	736.59	721.04	2.2	4.36
15.60	Al/UHMWPE	1071.68	725.44	736.71	1.5	3.04
17.40	Al/UHMWPE	988.45	517.27	500.82	3.3	6.68

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