应力调整对石英玻璃珠低速冲击破碎行为的影响

宋一平; 苗春贺; 单俊芳; 王鹏飞; 徐松林

doi:10.11883/bzycj-2021-0244

应力调整对石英玻璃珠低速冲击破碎行为的影响

doi: 10.11883/bzycj-2021-0244

宋一平^1,,
苗春贺¹,
单俊芳¹,
王鹏飞¹,
徐松林^{1, 2, ,}

1.
中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230027
2.
中国地震局地震预测研究所高压物理与地震科技联合实验室，北京 100036

基金项目: 国家自然科学基金（11672286，11872361，11602267）；中央高校基本科研业务费专项资金（WK2480000008）；高压物理与地震科技联合实验室室开放基金（2019HPPES01）

详细信息

作者简介:
宋一平（1997－　），女，硕士，syiping@mail.ustc.edu.cn

通讯作者:
徐松林（1971－　），男，博士，研究员，博士生导师，slxu99@ustc.edu.cn

中图分类号: O347
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- 文章访问数: 211
- HTML全文浏览量: 98
- PDF下载量: 39
- 被引次数: 0
出版历程
- 收稿日期: 2021-06-22
- 录用日期: 2022-06-01
- 修回日期: 2021-08-20
- 网络出版日期: 2022-06-07
- 刊出日期: 2022-07-25

Effect of stress-state adjustment on fragmentation behavior of quartz glass beads subjected to low-velocity impact

1.
CAS Key Laboratory for Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, Anhui, China
2.
United Laboratory of High Pressure Physics and Earthquake Science, Institute of Earthquake Forecasting, China Earthquake Administration, Beijing 100036, China

摘要

摘要: 结合高速摄影技术，应用SHPB加载装置，分别使用钢制、铝制和有机玻璃制3种透射杆，对直径约7.90、11.80、15.61 mm 3种尺寸的石英玻璃珠进行了低速冲击实验。根据不同透射杆条件下的玻璃珠破碎过程中的载荷-位移曲线，结合有限元软件计算玻璃珠在冲击作用下载荷的变化情况以及实验过程中玻璃珠的应变，探讨了应力调整对玻璃珠破碎过程的影响。结果表明：相同冲击条件作用下，改变透射杆的材料，会改变玻璃珠破碎过程中的载荷分布，即透射端边界波阻抗的改变会导致反射波发生改变，从而导致玻璃珠内部载荷发生变化；透射杆为铝材和有机玻璃材质时，玻璃珠在破碎过程中的载荷明显下降，在加载过程中伴随着垫块的变形，玻璃珠内部的应力调整时间变长；透射杆为钢杆时，玻璃珠的应变主要表现为两端最大，越靠近中间应变越小，对于透射杆为铝杆和有机玻璃杆的玻璃珠，透射端局部出现了卸载行为。采用有机玻璃透射杆之后，局部应力和变形降低的结果使得玻璃珠在经受较大的变形之后发生破碎，表明玻璃珠的破碎行为由局部变形和局部变形梯度共同控制。
- 冲击动力学 /
- 石英玻璃珠 /
- 临界破碎 /
- 应力调整
Abstract: By using a SHPB device combined with high-speed photography technology, low-velocity impact experiments of quartz glass beads with diameters of 7.90, 11.80 and 15.61 mm were carried out by means of respectively three kinds of transmission bars, i.e., steel bar, aluminum bar, and polymethyl methacrylate (PMMA) bar. According to the load-displacement curves in the breakage process of glass beads under different transmission bar conditions, combined with the load adjustment of glass beads under impact and the strain of glass beads during the experiment, the influence of stress adjustment on the breakage process of glass beads subjected to low-velocity impact is explored. The results show that under the same impact conditions, the adjustment of the material of the transmission bar will alter the load distribution in the glass bead during impact breakage, that is, the change of the wave impedance at the transmission end will change the reflected wave, which leads to the load adjustment in the process of multiple reflection loading. When the transmission bar is made of aluminum and PMMA, the load in the glass bead decreases obviously during the crushing process, and the stress adjustment duration of the glass bead becomes longer with more deformation of the cushion block during the loading process. When the transmission bar is made of steel, the strain in the glass bead is the largest at both ends, while the closer to the middle of the bead, the smaller the strain. For the glass beads loaded with aluminum and/or PMMA transmission bar, local unloading behavior is found at the transmission end of bead. By employing the PMMA transmission bar, the local stress and deformation both decrease, resulting in the glass bead being broken with larger deformation. It is further shown that glass bead breakage is controlled by local deformation and local deformation gradient.
- impact dynamics /
- quartz glass bead /
- critical breakage /
- stress-state adjustment

HTML全文

图 1 石英玻璃珠载荷-位移关系与破碎形态

Figure 1. Force-displacement curves and breakage patterns of quartz glass spheres

下载: 全尺寸图片幻灯片

图 2 改进的SHPB实验装置

Figure 2. Schematic diagram of a modified split Hopkinson pressure bar device

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图 3 直径7.90 mm玻璃珠的透射载荷-位移关系曲线

Figure 3. Transmitted load-displacement curves of glass sphere with diameter 7.90 mm

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图 4 直径7.90 mm玻璃珠的压缩过程

Figure 4. Compression processes of glass spheres with diameter 7.90 mm

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图 5 直径15.61 mm玻璃珠的透射载荷-位移关系曲线

Figure 5. Transmitted load-displacement curves of glass sphere with diameter 15.61 mm

下载: 全尺寸图片幻灯片

图 6 直径15.61 mm玻璃珠的压缩过程

Figure 6. Compression processes of glass spheres with diameter 15.61 mm

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图 7 玻璃珠的计算模型和有限元模型

Figure 7. Calculation model and finite element method model of glass sphere

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图 8 直径12.00 mm玻璃珠内部不同截面载荷-时间曲线

Figure 8. Load-time curves of different cross sections of glass beads with diameter 12.00 mm

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图 9 直径12.00 mm玻璃珠内部不同截面载荷-位置关系

Figure 9. Load-position relations of different cross sections of glass beads with diameter 12.00 mm

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图 10 直径12.00 mm玻璃珠内部剪应力分布

Figure 10. Shear stress distributions of glass beads with diameter 12.00 mm

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图 11 结合高速摄影计算的直径7.90 mm玻璃珠中应变演化

Figure 11. Strain evolutions in glass sphere with diameter 7.90 mm based on the high-speed photography

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图 12 基于高速摄影计算的直径15.61 mm玻璃珠中应变演化

Figure 12. Strain evolutions in glass spheres with diameter 15.61 mm based on the high-speed photography

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图 13 破碎阵面

Figure 13. Failure wave fronts

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图 14 基于剪切扩散理论计算的直径7.90 mm玻璃珠中应变演化

Figure 14. Strain evolutions in glass spheres with diameter 7.90 mm based on the shear activation diffusion theory

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图 15 基于剪切扩散理论计算的直径15.61 mm玻璃珠中应变演化

Figure 15. Strain evolution in glass sphere with diameter 15.61 mm based on shear activation diffusion theory

下载: 全尺寸图片幻灯片

表 1 玻璃珠两端载荷差统计

Table 1. Statistics of load differences between two ends of glass sphere

直径/mm	透射杆材料	平均应变率/s⁻¹	两端载荷差/%
7.90	钢	700	3.7～4.1
	铝	500	6.1～8.2
	有机玻璃	450	12.8～25.5
11.80	钢	600	7.9～8.3
	铝	450	8.0～15.8
	有机玻璃	300	62.9～77.8
15.61	钢	450	5.1～9.1
	铝	400	48.3～54.1
	有机玻璃	300	74.3～82.7

下载: 导出CSV

表 2 材料参数

Table 2. Parameters of materials

材料	密度/(kg·m⁻³)	声速/(m·s⁻¹)	弹性模量/GPa	泊松比
钢	7 800	5 100	203.0	0.30
铝	2 700	5 090	70.0	0.25
有机玻璃	1 800	1 270	2.9	0.32
石英玻璃珠	2 530	6 027	89.0	0.24

下载: 导出CSV

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