弹体正侵彻钢筋混凝土靶的试验及数值模拟研究

邓勇军; 陈小伟; 钟卫洲; 何丽灵

doi:10.11883/bzycj-2019-0001

弹体正侵彻钢筋混凝土靶的试验及数值模拟研究

doi: 10.11883/bzycj-2019-0001

邓勇军^{1, 2,},
陈小伟^3, ,,
钟卫洲^{1, 4},
何丽灵^{1, 4}

1.
西南科技大学工程材料与结构冲击振动四川省重点实验室，四川绵阳 621010
2.
西南科技大学土木工程与建筑学院，四川绵阳 621010
3.
北京理工大学前沿交叉科学研究院，北京 100087
4.
中国工程物理研究院总体工程研究所，四川绵阳 621999

基金项目: 国家自然科学基金（11390361, 11390362）

详细信息

作者简介:
邓勇军（1987－　），男，博士研究生，dyj820@swust.edu.cn

通讯作者:
陈小伟（1967－　），男，博士，研究员，博士生导师，chenxiaoweintu@bit.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: 2019-01-02
- 修回日期: 2019-04-29
- 刊出日期: 2020-02-01

Experimental and numerical study on normal penetration of a projectile into a reinforced concrete target

DENG Yongjun^{1, 2
,},
CHEN Xiaowei^{3
, ,},
ZHONG Weizhou^{1, 4},
HE Liling^{1, 4}

1.
Shock and Vibration of Engineering Materials and Structures Key laboratory of Sichuan Province, Southwest University of Sience and Technology, Mianyang 621010, Sichuan, China
2.
School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China
3.
Advanced Research Institute for Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
4.
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang, 621999, Sichuan, China

摘要

摘要: 开展了直径156 mm的大尺寸弹体正侵彻钢筋混凝土靶试验，通过预埋压力传感器获得了侵彻过程中不同位置处混凝土的压力值；结合数值模拟，分析了混凝土的损伤分区及不同位置的钢筋应力状态。结果表明：处于弹道附近的混凝土压力最大，峰值脉冲明显；随着距离的增加，峰值减小且脉宽增大，应力脉冲的形状由尖峰演变为相对平坦的波形。粉碎区内的钢筋达到其屈服强度，破裂区钢筋处于弹性状态，弹性区和未扰动区钢筋应力基本可以忽略。
- 钢筋混凝土 /
- 侵彻试验 /
- 数值模拟 /
- 压力分布 /
- 钢筋应力
Abstract: A series of experiments were carried out on a 156-mm-caliber oval projectile penetrating into an reinforced concrete target. With the pre-arranged pressure sensors, the pressures at different positions in the concrete targets were obtained during the penetration. Combined with numerical simulation, the damaged regions in the concrete targets and the stress states of the steel bars at different positions were analyzed. The results show that the pressures in the concrete nearby penetration trajectories are highest and the corresponding peak pulses are obvious. With the increases of the distances from the penetration trajectories, the peak pulses decrease and the pulse widths increase, the shape of the stress pulses changes from peak to relatively flat waveforms. The stress of the steel bar in the crushed region reaches its yield strength, the steel in the cracked region is in an elastic state, and the stress of the steel bar in the elastic region and the undisturbed region can be neglected.
- reinforced concrete /
- penetration test /
- numerical simulation /
- pressure distribution /
- steel stress

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图 1 靶体及钢筋分布示意图

Figure 1. Schematic diagram of steel and target

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图 2 压力传感器分布示意图

Figure 2. Schematic diagram of pressure sensors

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图 3 弹体尺寸

Figure 3. Size of the projectile

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图 4 试验装置图

Figure 4. Test installation

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图 5 高速摄影记录的弹体撞击靶体过程

Figure 5. High-speed photography of the process for projectile impact target

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图 6 试验结果（v=650 m/s）

Figure 6. Test results (v=650 m/s)

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图 7 弹体磨蚀情况

Figure 7. Erosion of projectile

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图 8 不同位置的压力时程曲线

Figure 8. Pressure vs time at different location

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图 9 有限元模型

Figure 9. Finite-element model

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图 10 混凝土破坏情况

Figure 10. Damage of concrete

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图 11 靶体在钢筋层位置出现整体脱离破坏

Figure 11. Detachment failure of reinforced concrete target at the steel layer

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图 12 数值模拟与实验的侵彻深度(h)对比

Figure 12. Depth of penetration of numerical and experimental

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图 13 侵彻过程中钢筋的破坏情况

Figure 13. Failure of steel during the penetration

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图 14 混凝土分区

Figure 14. Regions of concrete

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图 15 钢筋位置

Figure 15. Location of steel

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图 16 不同位置钢筋等效应力时程曲线

Figure 16. Mises stress (σ) history of steel at different position

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图 17 钢筋等效应力分布

Figure 17. Mises stress (σ) distribution of steel

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表 1 钢筋混凝土靶参数

Table 1. Parameters of reinforced concrete

尺寸/mm	压缩强度/MPa	钢筋直径/mm	钢筋屈服强度/MPa
2 500×2 500×1 800	30	10	345

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表 2 侵彻试验结果数据

Table 2. Results of penetration test

Test	f_c/(MPa)	v₀/(m∙s⁻¹)	h/m	D/m	m₀/kg	m₁/kg
1	30	650	1 120	1.5	32.576	32.216
2		675	1 320	1.7	32.658	32.498
3		680	1 320	正面严重损坏	33.177	32.607

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表 3 弹材参数

Table 3. Parameters of projectile

材料	ρ/(kg·m⁻³)	E/GPa	μ	σ/MPa	ε
弹体	7 910	210	0.3	0	0
注：ρ为密度；E为弹性模量；μ为泊松比；σ为屈服强度；ε为失效应变。

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表 4 K&C模型中混凝土的材料参数

Table 4. Parameters of K&C model

材料	ρ/(kg·m⁻³)	μ	F_t/MPa	A₀/MPa	α	β
混凝土	2 440	0.2	4	−48	3.94×10²	145
界面	2 440	0.2	2	−10	3.94×10²	145
注：A₀为抗压强度，F_t为抗拉强度；α为长度单位转换因子，β为应力单位换算系数。

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