月牙形空腔结构金属靶的抗弹性能分析

高伟韬; 彭克锋; 张永亮; 郑航; 赵凯; 郑志军

doi:10.11883/bzycj-2020-0473

月牙形空腔结构金属靶的抗弹性能分析

doi: 10.11883/bzycj-2020-0473

中国科学技术大学近代力学系中国科学院材料力学行为和设计重点实验室，安徽合肥 230027

基金项目: 中央高校基本科研业务费专项资金（WK2090000019）

详细信息

作者简介:
高伟韬（1995－　），男，博士研究生，gweitao@mail.ustc.edu.cn

通讯作者:
郑志军（1979－　），男，博士，副教授，zjzheng@ustc.edu.cn

中图分类号: O385
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-25
- 修回日期: 2021-04-02
- 网络出版日期: 2021-05-07
- 刊出日期: 2021-05-05

On ballistic performance of a metal target with crescent-shaped cavity structure

CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, Anhui, China

摘要

摘要: 为提高金属靶的抗弹性能，设计了一种含有月牙形空腔结构的金属靶。利用ABAQUS软件对月牙形空腔结构在12.7 mm穿甲燃烧弹弹芯侵彻下的弹体偏转性能进行了数值模拟研究，讨论了月牙形状、弹着点和空间排布对弹体偏转效果的影响。结果表明：月牙形状对弹体的偏转效果有显著的影响；空腔结构在不同弹着点表现出不同的弹体偏转性能，处于空腔胞元最薄弱处附近的弹着点弹体偏转角度明显小于其他位置；空腔胞元空间排布的非对称化处理能够提升空腔结构对子弹的偏转效果。
- 月牙形空腔结构 /
- 金属靶 /
- 抗弹性能 /
- 侵彻 /
- 弹体偏转
Abstract: To improve the ballistic performance of metal targets, a metallic structure composed of a series of crescent-shaped cavity cells, whose spatial distribution is similar to a honeycomb, was proposed. Each cavity cell is formed by two balls with an identical diameter offset by a certain distance and its shape looks like a crescent moon. The deflection performance of crescent-shaped cavity structures impacted by 12.7 mm armor-piercing incendiary projectile cores at an initial velocity of 818 m/s was studied numerically. Based on 3D voxel models, numerical simulation was carried out by using the finite element code ABAQUS/Explicit. The deflection angle of the projectile related to the initial impact direction was measured in the process of penetration simulation. By comparing with the experimental results in the literature, a virtual test was carried out to verify the validity of the finite element model. The influences of crescent shape, hitting position and space arrangement of cavity cells on the deflection performance were analyzed. The results show that the crescent shape has a significant effect on the overall deflection performance of the target. The deflection angle of the projectile increases with the increase of the cavity diameter, but the protection performance of the structure with larger cavity diameter becomes weaker. A cavity diameter of 18 mm with the offset distance of 5.4 mm may be appropriate when considering a high deflection performance without significant drop of the protection performance of the target plate. The target impacted by the projectile at different hitting positions shows different deflection performances. The deflection angle of the projectile is much large at those positions where the material distribution has a high asymmetry. The asymmetric treatment of the space arrangement of cavity cells can improve the deflection effect of the cavity structure. The deflection mechanism of the cavity structure is that when the projectile penetrates the interface between the material and cavity inside the target plate, the projectile is subjected to an asymmetric force distribution, which affects the subsequent penetration process.
- crescent-shaped cavity structure /
- metal target /
- ballistic performance /
- penetration /
- projectile deflection

HTML全文

图 1 弹体冲击空腔结构靶板的示意图

Figure 1. Schematic diagram showing a projectile impacting a cavity structure target

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图 2 靶板几何结构和尺寸

Figure 2. Geometric structures and sizes of targets

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图 3 弹靶有限元模型

Figure 3. A finite element model for a projectile and a target

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图 4 弹体偏转角度和角速度计算

Figure 4. Calculation of deflection angle and angular velocity of the projectile

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图 5 刚性弹侵彻603钢靶的变形图

Figure 5. Deformation diagram of a 603 steel target impacted by a rigid projectile

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图 6 靶板(d=16 mm, α=0.3)的变形和压强云图

Figure 6. Deformation and pressure cloud of the target with d=16 mm and α=0.3

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图 7 偏离度α对子弹偏转角度和角速度的影响

Figure 7. Influence of deviation degree α on the deflection angle and angular velocity of a projectile

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图 8 含有直径为16 mm的月牙形孔洞的靶板在不同偏离度时的变形

Figure 8. Deformation of the target with a 16-mm-diameter crescent-like hole at different deviation degrees

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图 9 不同偏离度时的月牙形状

Figure 9. Crescent shapes at different deviation degrees

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图 10 不同球径时子弹最大偏转角度随偏离度的变化曲线

Figure 10. Change of the maximum deflection angle with deviation degree at different sphere diameters

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图 11 α=0.3时靶板的变形

Figure 11. Deformation of targets at α=0.3

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图 12 弹着点2示意图

Figure 12. Diagram of hitting position 2

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图 13 α=0.3时θ_max随β的变化曲线

Figure 13. Change of θ_max with β at α=0.3

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图 14 不同弹着点时弹体最大偏转角

Figure 14. The maximum deflection angles of the projectile at different hitting positions

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图 15 弹体偏转角随时间的变化

Figure 15. Change of deflection angle of projectile with time

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图 16 弹体偏转俯视图

Figure 16. Top views of projectile deflection

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表 1 603装甲钢材料模型参数^[13]

Table 1. Material model parameters of 603 armor steel ^[13]

材料	ρ₀/(g·cm⁻³)	G/GPa	c_p/(J·kg⁻¹·K⁻¹)	c₀/(m·s⁻¹)	s₁	γ₀	χ	T_r/K	T_m/K	${\dot \varepsilon _0}$/s⁻¹
603钢	7.8	79.2	477	4 570	1.33	1.67	0.9	300	1 760	1.0

材料	A/MPa	B/MPa	n	C	m	D₁	D₂	D₃	D₄	D₅
603钢	950	660	0.232	0.008	1.03	−0.8	2.0	−0.47	2×10⁻⁴	0.61

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