马赫杆加载下无氧铜的动态破碎

叶川兵; 段志伟; 李绪海; 王曦; 潘昊; 俞宇颖; 胡建波

doi:10.11883/bzycj-2023-0172

马赫杆加载下无氧铜的动态破碎

doi: 10.11883/bzycj-2023-0172

1.
中国工程物理研究院流体物理研究所冲击波物理与爆轰物理全国重点实验室，四川绵阳 621999
2.
北京应用物理与计算数学研究所，北京 100094

基金项目: 国家自然科学基金（12072331）

详细信息

作者简介:
叶川兵（1997－　），硕士研究生， ychuanbing@foxmail.com

通讯作者:
胡建波（1980－　），博士，研究员， jianbo.hu@caep.cn

中图分类号: O383
计量
- 文章访问数: 220
- HTML全文浏览量: 64
- PDF下载量: 42
- 被引次数: 0
出版历程
- 收稿日期: 2023-05-10
- 修回日期: 2023-05-22
- 网络出版日期: 2023-07-19
- 刊出日期: 2023-11-17

Dynamic fragmentation of oxygen-free high-conducting copper under Mach stem loading

1.
National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics,China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China

摘要

摘要: 为了深入了解金属材料在复杂加载下的动态破碎行为，在有限元模拟的基础上，设计了两类马赫杆加载实验，用于研究无氧铜在复杂加载下的动态破碎行为。实验中，采用火炮加载马赫透镜和激光粒子速度干涉仪测量自由面速度，实现了峰值压力分别为95.75和32.38 GPa的动态加载。结果表明，实验中成功实现了稳定的马赫杆加载，并且观察到马赫杆加载下无氧铜的2种不同近表面破碎模式，即高压下产生微层裂、低压下产生三角波层裂，且层裂区呈凸形分布。
- 马赫杆 /
- 微层裂 /
- 无氧铜 /
- 动态破碎
Abstract: To in-depth understand the dynamic fracture behaviors of metal materials under complex loading, based on the finite element simulation, two types of Mach stem loading experiments were designed and carried out to investigate the dynamic fragmentation of oxygen-free high-conducting copper (OFHC Cu) under complex loading. In the experiments, a powder gun was used to impact the Mach lens, and a laser particle-velocity interferometer was applied to measure the free surface velocity. And dynamic loadings with the peak pressures of 95.75 and 32.38 GPa, respectively, were achieved. Stable Mach stem loading was successfully generated, and the Mach stem-related features were consistent with the simulated ones. At the same time, two different near-surface fracture behaviors in the OFHC Cu were observed, namely the micro-spallation under high pressure and the triangular-wave spallation under low pressure, with the cracked area distributed in a convex shape. These findings have a certain value for further understanding the dynamic fracture behaviors of metal materials and can provide new experimental methods for understanding material failure under various complex loading conditions.
- Mach stem /
- micro-spallation /
- OFHC Cu /
- dynamic fragmentation

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图 1 马赫透镜结构

Figure 1. Structure of Mach lens

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图 2 两类马赫杆加载下压力流场随时间演化的模拟结果

Figure 2. Numerically-simulated evolutions of pressure contours under two types of Mach stem loading

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图 3 实验Mach-1中圆柱试样靶中心线上等间距拉格朗日点的压强和速度模拟结果

Figure 3. Simulated velocity- and pressure-time evolutions of equidistant Lagrangian particles on the symmetrical centerline of the cylindrical specimen target in experiment Mach-1

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图 4 两类马赫杆加载实验设计

Figure 4. Experimental arrangements of two types of Mach stem loading

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图 5 实验Mach-1中铝套筒后自由面粒子速度剖面实验结果与模拟结果的比较

Figure 5. Comparison of rear free-surface particle velocity profiles of the aluminum sleeve in experiment Mach-1with the corresponding simulated ones

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图 6 实验 Mach-1中内圆柱中心处的DPS时谱图和自由面粒子速度剖面

Figure 6. DPS time-frequency spectrum and free-surface particle velocity profile at the center of the inner cylinder in experiment Mach-1

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图 7 实验Mach-2中不同位置处粒子速度剖面的实验结果与模拟结果的比较

Figure 7. Comparison of experimental and simulated results of particle velocity profiles at different positions in experiment Mach-2

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图 8 实验Mach-2中试样破坏形貌的模拟结果

Figure 8. Simulated failure morphologies of the specimen in experiment Mach-2

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表 1 Mie-Grüneisen状态方程参数^[18-20]

Table 1. Parameters of Mie-Grüneisen equations of state^[18-20]

材料	ρ₀/(g·cm⁻³)	c₀/(km·s⁻¹)	s	γ	来源
304不锈钢	7.90	4.57	1.49	1.93	文献[18]
LY12铝	2.79	5.37	1.29	2.0	文献[19]
无氧铜	8.93	3.94	1.489	2.02	文献[18]
TC4钛合金	4.42	5.13	1.028	1.23	文献[20]

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表 2 Johnson-Cook本构模型参数^{[17, 21-23]}

Table 2. Parameters of the Johnson-Cook constitutive model^{[17, 21-23]}

材料	A/MPa	B/MPa	n	C	m	T_m/K	来源
304不锈钢	310	1000	0.65	0.07	1.0	1673	文献[21]
LY12铝	369	684	0.73	0.0083	1.7	775	文献[22]
无氧铜	90	292	0.31	0.025	1.09	1356	文献[17]
TC4钛合金	862	331	0.34	0.012	0.8	2110	文献[23]

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表 3 设计参数

Table 3. Parameters of experimental design

实验编号	材料			飞片速度/(km·s⁻¹)	厚度/mm		直径/mm
实验编号	飞片	外圆	内圆	飞片速度/(km·s⁻¹)	飞片	样靶	内圆	外圆
Mach-1	304不锈钢	LY12 铝	无氧铜	1.40	3.0	16.0	4.8	38.0
Mach-2	304不锈钢	TC4钛合金	无氧铜	0.50	12.0	26.0	14.0	45.0

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