PELE弹丸壳体的损伤断裂模型

梁民族; 李翔宇; 覃金贵; 卢芳云; 王马法

doi:10.11858/gywlxb.2014.06.011

PELE弹丸壳体的损伤断裂模型

doi: 10.11858/gywlxb.2014.06.011

国防科学技术大学理学院工程物理研究所，湖南长沙 410073

基金项目: 国家自然科学基金(11132012)

详细信息

作者简介:
梁民族(1989—), 男，博士研究生，主要从事材料动态力学性能研究.E-mail:mzliang@nudt.edu.cn

通讯作者:
卢芳云(1963—), 女，博士，教授，主要从事材料动态力学性能研究.E-mail:fylu@nudt.edu.cn

中图分类号: O346.1
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出版历程
- 收稿日期: 2012-11-30
- 修回日期: 2013-02-22

Damage and Fracture Model for Shell of PELE

Institute of Engineering Physics, College of Science, National University of Defense Technology, Changsha 410073, China

摘要

摘要: 结合横向效应增强型侵彻体(PELE)侵彻金属靶板的数值模拟结果和实验结果，将PELE弹丸壳体膨胀断裂过程分为加速膨胀和匀速膨胀两个阶段。在封加波提出的损伤度模型的基础上，推导得到PELE弹丸壳体的损伤断裂方程；并通过PELE壳体断裂实例计算了PELE弹丸壳体膨胀断裂过程的参数，分析了弹丸着靶速度与壳体断裂之间的关系，为PELE弹丸设计提供了理论指导。
- 横向效应增强型侵彻体 /
- 壳体 /
- 横向效应 /
- 损伤断裂 /
- 临界应变
Abstract: Combining the simulation with the experimental results of the penetration process of penetrator with enhanced lateral effect (PELE) in metallic target, the process of the shell expansion can be divided into two stages, the accelerating expansion and the uniform expansion.Based on the model of the damage function by Feng Jiabo, we obtained the damage and fracture evolution equation responsible for the shell of PELE.According to the damage evolution equation responsible for the shell of PELE, the fracture process parameters of PELE were calculated.Moreover, the relationship between shell fracture critical strain and velocity of the projectile was analysised, which is useful in engineering design of PELE.
- penetrator with enhanced lateral effect /
- shell /
- lateral effect /
- damage and fracture /
- critical strain

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图 1 PELE的3个阶段

Figure 1. Three stages of penetration process of the PELE

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图 2 PELE弹丸计算模型

Figure 2. Calculation model of the PELE

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图 3 PELE弹丸壳体Gauge点的径向速度

Figure 3. The radical velocity of gauge points in the PELE

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图 4 实验装置示意图

Figure 4. Experimental setup

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图 5 实验装置

Figure 5. Experimental device

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图 6 PELE壳体断裂的临界应变

Figure 6. Critical strain of the PELE

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表 1 材料模型

Table 1. Material model

Component	Material species	Equation of state	Strength model	Invalidation model
Shell	35CrMnSi	Linear	Johnson-Cook	Principal stress
Core	Polyethylene	Shock	von-Mises	-
Target plate	RHA	Shock	von-Mises	Material strain

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表 2 材料参数

Table 2. Material parameters

Material	ρ/(g/cm³)	E/(GPa)	σ/(MPa)	G/(GPa)	ν
35CrMnSi	7.8	210	1 270	81	0.33
Polyethylene	0.94	1.5	0.26	0.55	0.45
RHA	7.8	171	1400	64.1	0.33

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表 3 着靶速度与穿靶时间统计

Table 3. Statistics of the impact velocity and the penetrating time

Experimental No.	Velocity/(m/s)	Time/(μs)	Radical velocity/(m/s)
1	643	8.4	127
2	694	7.2	142
3	762	6.5	153

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表 4 3个时刻膨胀断裂过程的参数

Table 4. Parameters of expansion and fracture at three time points

t/(μs)	$\dot{e}^{\mathrm{p}} /\left(10^{4} \mathrm{~s}^{-1}\right)$	R₂/(mm)	u₀/(m/s)
8.4	2.62	17.7	127
7.2	1.91	18.6	142
6.5	1.71	19.9	153

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参考文献(11)

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