带模拟装药弹体高速冲击岩石靶时的断裂特性

孙其然; 孙宇新; 李芮宇; 邓国强; 胡金生

doi:10.11883/bzycj-2017-0313

带模拟装药弹体高速冲击岩石靶时的断裂特性

doi: 10.11883/bzycj-2017-0313

1.
南京理工大学瞬态物理国家重点实验室, 江苏南京 210094
2.
中国舰船研究设计中心, 湖北武汉 430064
3.
工程兵科研四所, 北京 100850

详细信息

作者简介:
孙其然(1991-), 男, 博士研究生

通讯作者:
孙宇新, yxsun01@163.com

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2017-09-03
- 修回日期: 2017-12-11
- 刊出日期: 2019-01-25

Simulation of explosive simulant filled with high-velocity projectiles crushing onto rock

1.
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China
2.
China Ship Development and Design Center, Wuhan 430064, Hubei, China
3.
No.4 Engineering Research Institute, General Staff Headquarters of PLA, Beijing 100850, China

摘要

摘要: 针对高速侵彻过程中的弹体破碎断裂问题，本文中设计2种不同壁厚的试验弹，进行约1 000 m/s着速的高强度岩体侵彻试验，试验表明：在该高着速条件下，两种结构的试验弹体均发生完全破碎且未能有效侵入岩石靶，而岩石靶体仅在表层产生粉碎性破坏；另外，高速侵彻岩石靶的弹体头部破碎情况与侵彻金属薄靶有所区别。在试验基础上，利用Autodyn-3D建立了弹体侵彻岩石靶的物理模型，结合SPH算法与Mott失效模型对弹体破坏过程进行了数值模拟，可有效地揭示弹体破碎机理，并进一步讨论模拟装药和小范围内不同高速对弹体破坏的影响。试验结果和建立的数值模型可为研究高速侵彻中弹体结构安全提供参考。
- 侵彻极限 /
- 高速 /
- 岩石 /
- 弹体破坏 /
- Mott模型
Abstract: Addressing the projectile crush during high-speed penetration, we designed projectiles with two different shell thicknesses and conducted experiment for penetrating high-strength rock target at 1 000 m/s. The experimental results showed that projectiles with different shell thicknesses were completely broken and failed to effectively penetrate the rock target while the rock target was only comminuted on the surface, and that the fragmentation of the projectile tip during high-speed penetration in rock target was different from that in the thin metal target. In addition, based on the experimental results, we established the simulation model of the projectile penetrating the rock target using Autodyn-3D. Combining the SPH method with the Mott distribution failure model, we performed the numerical simulation of the projectile's crush process and revealed the mechanism of the projectile's breaking. Furthermore, we examined the influence of the simulated charge and the small range of different high velocities on the projectile's crush. The experimental results and the proposed numerical method can serve as reference for further study of the projectile's structure during high velocity penetration.
- penetration limitation /
- high velocity /
- rock /
- projectile crush /
- Mott distribution

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图 1 弹体结构示意图

Figure 1. Sketch of projectile geometry

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图 2 弹体冲击后岩石靶体正表面

Figure 2. Rock target's impacted surface

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图 3 试验现场收集的弹片

Figure 3. Collection of projectile fragments in field test

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图 4 两种典型破坏断面

Figure 4. Two typical broken sections

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图 5 计算模型

Figure 5. Simulation model

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图 6 弹体侵彻岩石靶过程

Figure 6. Simulation of penetration into rock

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图 7 弹壳破碎过程

Figure 7. Projectile fracture process

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图 8 t=300 μs时刻弹壳轴向裂纹

Figure 8. Axial crack in projectile (t=300 μs)

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图 9 无装填物的弹壳破坏过程

Figure 9. Crush process of projectile without filling

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图 10 不同弹速下弹壳破坏比较

Figure 10. Comparison of projectile crush at different velocites

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表 1 金属材料主要参数

Table 1. Main parameters of metal material

位置	材料	ρ₀/(kg·m^-3)	G/GPa	A/GPa	B/GPa	n	C
弹体	35CrMnSi	7.93	81.8	1.500	0.500	0.26	0.014
后盖	7039铝	2.77	27.6	0.337	0.345	0.41	0.010
钢圈	4340钢	7.83	81.8	0.792	0.510	0.26	0.014

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表 2 硫磺材料参数

Table 2. Material parameters of sulfur

材料	ρ₀/(kg·m^-3)	Grüneisen系数	c/(m·s^-1)	S₁
硫磺	2.02	0	2.7	0.95

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