细观混凝土靶抗侵彻数值模拟及侵彻深度模型

吴成; 沈晓军; 王晓鸣; 姚文进

doi:10.11883/bzycj-2017-0123

细观混凝土靶抗侵彻数值模拟及侵彻深度模型

doi: 10.11883/bzycj-2017-0123

南京理工大学智能弹药技术国防重点学科实验室, 江苏南京 210094

基金项目:

国家自然科学基金项目 11602111

详细信息

作者简介:
吴成(1989-), 男, 博士研究生, qqqwucheng@163.com

中图分类号: O385
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- 被引次数: 8
出版历程
- 收稿日期: 2017-04-14
- 修回日期: 2017-05-22
- 刊出日期: 2018-11-25

Numerical simulation on anti-penetration and penetration depth model of mesoscale concrete target

Ministerial Key Laboratory of ZNDY, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China

摘要

摘要: 为研究细观混凝土靶的侵彻规律，采用LS-DYNA软件对刚性弹丸侵彻两相混凝土靶进行了数值模拟。结果表明，影响靶板抗侵彻能力的主要因素是砂浆种类、粗骨料种类和粗骨料体积分数；混凝土靶中的砂浆与对应的砂浆靶中的砂浆产生的阻力接近；混凝土靶中的粗骨料产生的阻力远低于对应的岩石靶中的岩石。通过扩展Forrestal阻力方程，建立了细观混凝土侵彻深度模型，模型和数值模拟一致性很好。
- 侵彻 /
- 细观 /
- 混凝土 /
- LS-DYNA /
- 侵彻深度
Abstract: In order to study the penetration law of the mesoscale concrete target, The LS-DYNA software is used to simulate the penetration of rigid projectiles into two-phase concrete target. The results show that the main factors affecting the penetration resistance of the target are mortar type, coarse aggregate type and coarse aggregate volume fraction. The resistance of mortar in concrete target is close to the same part of mortar in mortar target. The resistance of coarse aggregate in concrete target is much lower than the same part of rock in rock target. By extending the Forrestal resistance equation, the penetration depth model of mesoscale concrete is established, which is in good agreement with the numerical simulation.
- penetration /
- mesoscale /
- concrete /
- LS-DYNA /
- penetration depth

HTML全文

图 1 三维混凝土靶网格的截面

Figure 1. Cross section of 3D concrete target grid

下载: 全尺寸图片幻灯片

图 2 最大粗骨料尺寸d_a、撞击位置、粗骨料形状、粗骨料级配方式、粗骨料体积分数φ对侵彻深度P的影响

Figure 2. Influence of maximum coarse aggregate size d_a, impact position, coarse aggregate shape, coarse aggregate gradation, coarse aggregate volume fraction φ on penetration depth P

下载: 全尺寸图片幻灯片

图 3 砂浆靶、混凝土靶和岩石靶的细观有限元网格

Figure 3. Mesoscopic finite element grid of mortar target, concrete target and rock target

下载: 全尺寸图片幻灯片

图 4 混凝土靶和砂浆靶中相同部分砂浆对弹丸施加的轴向阻力对比

Figure 4. Comparison of the axial resistance to projectile from the mortar in the same part of concrete target and mortar target

下载: 全尺寸图片幻灯片

图 5 混凝土靶和岩石靶中相同部分岩石对弹丸施加的轴向阻力对比

Figure 5. Comparison of the axial resistance to projectile from the rock in the same part of concrete target and rock target

下载: 全尺寸图片幻灯片

图 6 体应变、网格截面及等效剪应变

Figure 6. Volumetric strain, cross section of grid and effective shear strain

下载: 全尺寸图片幻灯片

图 7 不同入射速度v₀和不同粗骨料体积分数φ下侵彻深度的理论和数值模拟对比

Figure 7. Comparison of penetration depth between theory and simulation at different impact velocity v₀ and different coarse aggregate volume fraction φ

下载: 全尺寸图片幻灯片

表 1 Salem石灰岩HJC本构参数

Table 1. HJC model parameters of Salem limestone

ρ₀/(g·cm^-3)	G/GPa	A	B	C	N	f′_c/MPa	T/MPa	${\dot \varepsilon _0}$ /s^-1	E_{f, min}
2.3	10	0.55	1.23	0.009 7	0.89	60	4	1	0.01

S_max	P_crush/MPa	μ_crush	P_lock/GPa	μ_lock	D₁	D₂	K₁/GPa	K₂/GPa	K₃/GPa
20	20	0.001 25	2	0.174	0.04	1.0	39	-223	550

下载: 导出CSV

表 2 S型砂浆HJC本构参数

Table 2. HJC model parameters of type S mortar

ρ₀/(g·cm^-3)	G/MPa	A	B	C	N	f′_c/MPa	T/MPa	${\dot \varepsilon _0}$ /s^-1	E_{f, min}
1.604	1 150	0.66	1.335	0.001 8	0.845	12.3	1.8	1	0.01

S_max	P_crush/MPa	μ_crush	P_lock/MPa	μ_lock	D₁	D₂	K₁/MPa	K₂/GPa	K₃/GPa
80.24	13.8	0.007 5	109.6	0.15	0.006 629	1.0	300	-2	19

下载: 导出CSV

表 3 侵彻数值模拟方案及侵彻深度P

Table 3. Numerical simulation scheme and penetration depth P

方案	v₀/ (m·s^-1)	粗骨料形状	d_a/mm	粗骨料级配	粗骨料方向	φ/%	附加说明	P/cm
1	500	球体	∅25	Fuller连续级配	-	33	-	73.9
2	500	球体	∅40	Fuller连续级配	-	33	-	74.6
3	500	球体	∅60	Fuller连续级配	-	33	撞击位置1 (轴线)	73.5
4	500	球体	∅60	Fuller连续级配	-	33	撞击位置2 (横向偏移2 cm)	73.3
5	500	球体	∅60	Fuller连续级配	-	33	撞击位置3 (横向偏移-2 cm)	73.7
6	500	长方体	30×30×10	3种粗骨料尺寸	最短边与弹轴平行	33	-	69.2
7	500	长方体	30×30×10	3种粗骨料尺寸	最短边与弹轴垂直	33	-	75.8
8	500	长方体	30×20×10	3种粗骨料尺寸	最短边与弹轴平行	33	-	70.8
9	500	长方体	30×20×10	3种粗骨料尺寸	最短边与弹轴垂直	33	-	75.7
10	500	长方体	30×10×10	3种粗骨料尺寸	最短边与弹轴平行	33	-	69.9
11	500	长方体	30×10×10	3种粗骨料尺寸	最短边与弹轴垂直	33	-	75.8
12	500	球体	∅40	Fuller连续级配	-	20	-	85.0
13	500	球体	∅40	粗骨料尺寸相同	-	20	-	88.3
14	500	球体	∅40	Fuller连续级配	-	50	-	66.1
15	500	-	-	-	-	100	靶板为岩石	27.0
16	500	-	-	-	-	0	靶板为砂浆	97.6
17	800	球体	∅40	Fuller连续级配	-	33	-	153.3
18	300	球体	∅40	Fuller连续级配	-	33	-	33.8

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施引文献

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