修正金属本构模型在超高速撞击模拟中的应用

马坤; 李名锐; 陈春林; 沈子楷; 周刚

doi:10.11883/bzycj-2021-0315

修正金属本构模型在超高速撞击模拟中的应用

doi: 10.11883/bzycj-2021-0315

马坤^1,,
李名锐¹,
陈春林¹,
沈子楷^{1, 2},
周刚^1, ,

1.
西北核技术研究所，陕西西安 710024
2.
清华大学工程物理系，北京 100084

基金项目: 国家自然科学基金（11772269，11402213）

详细信息

作者简介:
马　坤（1986－　），男，博士研究生，makun@nint.ac.cn

通讯作者:
周　刚（1964－　），男，研究员，博士生导师，gzhou@nint.ac.cn

中图分类号: O347.3; TJ012.4
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- 文章访问数: 361
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- 被引次数: 0
出版历程
- 收稿日期: 2021-07-30
- 修回日期: 2022-01-04
- 网络出版日期: 2022-04-07
- 刊出日期: 2022-09-29

The application of a modified constitutive model of metals in the simulation of hypervelocity impact

MA Kun^1
,,
LI Mingrui¹,
CHEN Chunlin¹,
SHEN Zikai^{1, 2},
ZHOU Gang^{1
, ,}

1.
Northwest Institute of Nuclear Technology, Xi’an 710024, Shaanxi, China
2.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China

摘要

摘要: 为更加准确地计算93钨合金弹超高速撞击Q345钢板问题，构建了修正的金属本构模型。引入GRAY三相物态方程描述材料相态变化，采用Johnson-Cook强度模型描述撞击后期材料的力学行为。结合封加波损伤演化模型以及Johnson-Cook失效模型描述不同应力三轴度下材料的拉伸、剪切失效行为；引入曹祥提出的断裂演化模型，描述材料失效后应力归零的过程。通过对比超高速撞击数值模拟结果与实验结果，验证了本构模型的适用性，并进一步分析了典型弹靶撞击条件下破片群的空间分布特征。研究结果表明：基于修正金属本构模型获得的超高速撞击靶板穿孔直径、弹体侵蚀长度、破片群扩展速度结果与实验结果一致；GRAY三相物态方程能够相对准确地给出弹体撞击首层靶板以及剩余弹体、破片群撞击第2层靶板时弹靶材料的熔化情况；封加波损伤演化模型能够准确判断超高速撞击过程中靶板是否产生层裂破坏；综合封加波损伤演化模型、Johnson-Cook失效模型以及曹祥提出的断裂演化模型后，数值模拟获得的破片群撞击后效靶板的穿孔面积与累积数量的统计曲线结果与实验结果一致；获得了典型条件下的柱形93钨弹体超高速撞击Q345靶板破片群空间分布结果，破片群的前端具有较高的质量、轴向动量以及横向动量（绝对值）。
- 超高速撞击 /
- GRAY物态方程 /
- 封加波损伤演化模型 /
- Johnson-Cook失效模型 /
- 断裂演化模型
Abstract: To accurately calculate the hypervelocity impact of 93 tungsten alloy projectile on Q345 steel plate, a modified constitutive model of metals is established. The GRAY three-phase equation of state is introduced to describe the phase change of the material, while the Johnson-Cook strength model is used to describe the mechanical behavior of the material in the late stage of impact process. Combined with the Feng’s damage evolution model and Johnson-Cook failure model, the tensile and shear failure behavior of materials under different stress triaxiality are represented. The fracture evolution model proposed by Cao Xiang is adopted to describe the process of stress vanishing after material failure. The applicability of the constitutive model is then verified by comparing the numerical simulation results with the experimental ones. Furthermore, the spatial distribution characteristics of fragment group in a typical process of a projectile impacting target are analyzed. The results show that based on the modified metal constitutive model, the perforation diameter of the target, the erosion length of projectile and the expansion velocity of fragment group of the hypervelocity impact are consistent with the experimental results. The GRAY three-phase equation of state can relatively accurately give the melting situation of the projectile and target materials when the projectile impacts the first layer of the target plate and the remaining projectile and fragment group impact the second layer of the target plate. The Feng’s damage evolution model can accurately judge whether spallation occurs during the hypervelocity impact. After integrating Feng’s damage evolution model, Johnson-Cook failure model and fracture evolution model proposed by Cao Xiang, the statistical curve of perforation area and cumulative number of aftereffect target plate impacted by fragment group obtained from the numerical simulation are consistent with the experiment data. The spatial distribution results of fragment group of cylindrical 93 tungsten projectile hypervelocity impacting Q345 target plate under typical conditions are obtained, and the front part of fragment group possesses high mass, high axial momentum and high transverse momentum by their absolute values.
- hypervelocity impact /
- GRAY equation of state /
- Feng’s damage evolution model /
- Johnson-Cook failure model /
- fracture evolution model

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图 1 数值模拟首层靶后破片群形貌及熔化状态

Figure 1. The morphology and melting state of the fragment group after the first layer of target obtained by numerical simulation

下载: 全尺寸图片幻灯片

图 2 实验第1层和第2层靶板断口的SEM结果

Figure 2. SEM results of fracture surface of the first and second layers of the target plates

下载: 全尺寸图片幻灯片

图 3 数值模拟弹体穿透第2层靶板时弹靶位置及靶板撞击坑熔化状态

Figure 3. Numerical simulation of projectile target position and melting state of impact crater when projectile penetrates the second layer of the target plate

下载: 全尺寸图片幻灯片

图 4 实验第2层靶板破片撞击坑SEM形貌图

Figure 4. SEM morphologies of impact crater of fragments in the second layer of target

下载: 全尺寸图片幻灯片

图 5 实验与数值模拟后效靶穿孔形貌对比

Figure 5. Comparison of experiment and numerical simulation on the perforation morphology of aftereffect target

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图 6 实验与数值模拟后效靶穿孔累积数量与穿孔面积统计曲线对比

Figure 6. Comparison of experiment and numerical simulation on the statistical curves of cumulative perforation number and perforation area

下载: 全尺寸图片幻灯片

图 7 破片数量、质量关于破片群轴向比速度的分布

Figure 7. Distribution of fragments number and mass in relation to fragment specific axial velocity

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图 8 破片数量、质量关于破片群横向比速度的分布

Figure 8. Distribution of fragments number and mass in relation to fragment specific lateral velocity

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图 9 破片轴向动量、横向动量关于破片群轴向比速度的分布

Figure 9. Distributions of fragments axial momentum and lateral momentum in relation to fragment specific axial velocity

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表 1 93钨合金、Q345钢GRAY物态方程及损伤演化模型材料参数

Table 1. The material parameters of the GRAY equation of state and the damage evolution model for 93 tungsten alloy and Q345 steel

材料	ρ₀/(kg·cm⁻³)	S	γ₀	c₀/(m·s⁻¹)	a	g_e	T_m0	V_J/V₀	V_b/V₀
93钨合金	17.6	1.23^[22]	1.67^[22]	4040^[22]	1.23	1 090	4.52	1.34	0.50
Q345钢	7.83	1.49^[23]	2.17^[23]	4569^[23]	1.49	960	2.38	1.40	0.51

材料	a_y	M_a/(g·mol⁻¹)	ω/(J·m⁻²)	σ₀/GPa	D₀	D_c	β	W_e/(kJ·m⁻²)
93钨合金	10.2	183.85	300	1.4	1.0×10⁻⁴	0.01	10.0	24
Q345钢	4.4	55.38	2 050	0.7	1.0×10⁻⁴	0.02	10.0	41

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表 2 93钨合金、Q345钢Johnson-Cook强度模型材料参数

Table 2. The material parameters of the Johnson-Cook yield criterion for 93 tungsten alloy and Q345 steel

材料	G/GPa	Q₁/MPa	Q₂/MPa	Q₃	Q₄	Q₅	T_m/K	$\dot\varepsilon_0 $/s⁻¹
93钨合金	132.00	600.8	1200	0.4944	0.059	0.8203	3683	0.001
Q345钢^[24]	80.47	374	795.7	0.4545	0.01586	0.8856	1795	0.001

下载: 导出CSV

表 3 93钨合金、Q345钢Johnson-Cook失效模型材料参数

Table 3. The material parameters of the Johnson-Cook failure model for 93 tungsten alloy and Q345 steel

材料	D₁	D₂	D₃	D₄	D₅	T_m/K	$\dot{\varepsilon}_0$/s⁻¹
93钨合金	0.09100	0.40900	−2.4600	−0.21800	1.613	3683	0.001
Q345钢	0.09436	1.15059	−3.0597	0.01645	0.240	1795	0.001

下载: 导出CSV

表 4 靶板穿孔直径的数值模拟结果与实验结果对比

Table 4. Comparison of numerical simulation results and experimental results of perforation diameter of the target plate

实验	弹直径/mm	弹长/mm	靶厚/mm	撞击速度/(m·s⁻¹)	实验穿孔直径/mm	数值模拟穿孔直径/mm	误差/%
1	2.32	23.2	1.5	2847	5.357	5.493	2.54
2	2.92	14.6	1.5	3140	6.420	6.761	5.31
3	2.32	23.2	1.5	2300	5.008	4.907	−2.02
4	2.92	14.6	1.5	2180	5.566	5.755	3.40
5	3.45	10.5	1.5	3000	6.917	7.277	5.20
6	3.45	10.5	1.5	3010	6.808	7.279	6.92
7	3.45	10.5	1.5	3160	6.826	7.370	7.97

下载: 导出CSV

表 5 破片群扩展速度、弹体侵蚀长度数值模拟结果与实验结果对比

Table 5. Comparison of numerical simulation results and experimental results of fragment group expansion speed and erosion length of projectile

实验	弹直径/ mm	弹长/ mm	靶厚/ mm	初速度/ (m·s⁻¹)	实验			数值模拟			误差
实验	弹直径/ mm	弹长/ mm	靶厚/ mm	初速度/ (m·s⁻¹)	v_x，max/(m·s⁻¹)	v_r，max/(m·s⁻¹)	ΔL/mm	v_x，max/(m·s⁻¹)	v_r，max/(m·s⁻¹)	ΔL/mm	ε(v_x，max) /%	ε(v_r，max)/%	ε(ΔL)/%
7	3.45	10.5	1.5	3160	3143	837	3.40	3116	875	3.60	−0.86	4.54	5.88
8	2.92	14.6	1.5	2975	2953	738	3.21	2947	780	2.99	−0.20	5.69	−6.85
9	2.32	23.2	2.0	2180	2123	460	3.10	2149	458	2.84	1.22	−0.44	−8.39

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表 6 不同靶厚与弹体直径比的破片群实验结果与数值模拟结果对比

Table 6. Comparison of experimental results and numerical simulation results of fragment group with different target thickness and projectile diameter ratio

实验	t_t /d_p	是否有“尖端”	高速摄像结果	数值模拟结果
7	0.435	有
8	0.514	有
9	0.862	无

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