平头弹穿透接触式双层金属板的理论研究

任善良; 文鹤鸣; 周琳

doi:10.11858/gywlxb.20170695

平头弹穿透接触式双层金属板的理论研究

doi: 10.11858/gywlxb.20170695

中国科学技术大学中科院材料力学行为和设计重点实验室, 安徽合肥 230027

详细信息

作者简介:
任善良(1991—), 男, 硕士, 主要从事冲击动力学研究.E-mail:rsl@mail.ustc.edu.cn

通讯作者:
文鹤鸣(1965—), 男, 教授, 主要从事冲击动力学研究.E-mail:hmwen@ustc.edu.cn

中图分类号: O385
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出版历程
- 收稿日期: 2017-12-21
- 修回日期: 2018-01-08

Theoretical Study of the Perforation of Double-Layered Metal Targets without Spacing Struck by Flat-Ended Projectiles

CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China

摘要

摘要: 在工程实践中，为提高靶板的抗弹性能通常用双层板代替单层板，对平头弹穿透等厚接触式双层金属板进行了理论研究。基于先前单层金属板的穿透理论和实验研究，提出了等厚接触式双层金属板穿透的新模型，利用靶板破坏的应变失效准则分别求出两层板发生的最大整体变形及消耗的能量，根据能量守恒求得双层板的弹道极限。模型预测结果与有限的实验数据吻合较好。当总厚度大于绝热剪切冲塞临界厚度值时，双层板的弹道极限明显高于单层板的弹道极限；小于该值时，双层板与单层板的弹道极限差别不大。
- 平头弹 /
- 双层金属板 /
- 理论模型 /
- 弹道极限
Abstract: A monolithic metal plate is usually replaced with a double-layered metal target with the same thickness to improve the ballistic limit in practical engineering.This paper presents a theoretical study of the perforation of a double-layered metal target without spacing by a flat-nosed projectile.Based on the previous analytical work and experimental observations a new theoretical model was proposed to predict the peroration of the double-layered metal target in comparison with the test data available.It was found that the predictions made from the present model are in good agreement with the test data.It was also found that the ballistic limit for a double-layered metal target is considerably higher than that for a monolithic one when its thickness is larger than the critical thickness at which adiabatic shear plugging occurs; that the ballistic limits are more or less the same for both targets when the total thickness is below the critical value.
- flat-ended projectile /
- double-layered metallic target /
- theoretical model /
- ballistic limit

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图 1 平头弹加载固支金属圆板示意图

Figure 1. Schematic of fully-clamped circular metal plates loaded by flat-ended projectile

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图 2 第二层板破坏示意图

Figure 2. Schematic of second plate failure

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图 3 双层Weldox700E钢板的最大整体变形

Figure 3. Maximum global deformation of double-layered plates of Weldox700E

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图 4 本研究理论模型与Weldox700E板实验数据和单层板模型的比较

Figure 4. Comparison of present model with experimental data for Weldoc700E plates and theoretical models for monolithic plates

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图 5 双层Q235钢板的最大整体变形

Figure 5. Maximum global deformation of double-layered plates of Q235

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图 6 本研究理论模型与Q235钢板实验数据和单层板模型的比较

Figure 6. Comparison of present model with experimental data for Q235 plates and theoretical models for monolithic plates

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表 1 Weldox700E钢板相关参数值^{[3, 9, 11]}

Table 1. Parameters for Weldox700E steel plates^{[3, 9, 11]}

σ_y/MPa	σ_u/MPa	ρ_t/(kg·m^-3)	n	γ_c	D/s^－1
859	877	7 850	0.12	1.4	4.6×10⁷

d/mm	M/g	R/mm	a/mm	q	ε_f
20	197	250	10	7.33	1.05

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表 2 Q235钢板相关参数值^{[6, 9, 12]}

Table 2. Parameters for Q235 steel plates^{[6, 9, 12]}

σ_y/MPa	σ_u/MPa	ρ_t/(kg·m^-3)	n	γ_c	D/s^-1
229	335	7 800	0.08	0.8	1 400

d/mm	M/g	R/mm	a/mm	q	ε_f
12.7	34.5	85	6.35	1.5	1.05

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参考文献(12)

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