双石英玻璃珠的低速冲击破碎行为

简世豪; 苗春贺; 张磊; 单俊芳; 王鹏飞; 徐松林

doi:10.11858/gywlxb.20200629

双石英玻璃珠的低速冲击破碎行为

doi: 10.11858/gywlxb.20200629

简世豪^1,,
苗春贺¹,
张磊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: 高压物理与地震科技联合实验室开放基金（2019HPPES01）；国家自然科学基金（11672286，11872361，11602267）

详细信息

作者简介:
简世豪（1995－），男，硕士研究生，主要从事颗粒破碎研究. E-mail：285390814@qq.com

通讯作者:
徐松林（1971－），男，博士，研究员，博士生导师，主要从事材料冲击下的动态响应研究.E-mail：slxu99@ustc.edu.cn

中图分类号: O346.13
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出版历程
- 收稿日期: 2020-10-27
- 修回日期: 2020-11-06

Fragmentation of Double Quartz Glass Spheres Subjected to Lower-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.
The United Laboratory of High-Pressure Physics and Earthquake Science, CEA Key Laboratory of Earthquake Prediction (Institute of Earthquake Science), China Earthquake Administration, Beijing 100036, China

摘要

摘要: 应用分离式霍普金森压杆（SHPB）加载装置，对直径为8.30、11.68、15.42、17.50 mm的石英玻璃珠开展了冲击速度为5.6～11.5 m/s的双玻璃珠系动态破碎实验。利用高速摄影技术记录双玻璃珠在动态冲击下的破碎过程，结合透射载荷-位移曲线以及破碎产物的粒度分析结果，探讨了石英玻璃双颗粒在冲击下的破坏机制。结果表明：由于双颗粒系中载荷的不均匀特性，两个玻璃珠的破碎具有时序特征，随冲击速度的增加而改变；玻璃珠的冲击破碎源于接触部位局部的Hertz裂纹扩张和裂纹系的扩散，而不是通常认为的贯穿性的斜裂纹体系；瞬态红外测温揭示了玻璃珠冲击破碎的两种主要机制和临界破碎扩散阻力的存在。研究结果对认识脆性颗粒介质的动态破坏机制具有良好的参考意义。
- 冲击动力学 /
- 石英玻璃 /
- 高速摄影 /
- 粒度分布 /
- 破碎
Abstract: By employing a split Hopkinson pressure bar (SHPB) device, the dynamic crushing experiments of quartz glass beads with diameters of 8.30, 11.68, 15.42 and 17.50 mm, were implemented with impact velocity of 5.6–11.5 m/s. High-speed photographing technology was used to record the crushing process of double glass beads during impact. Combined with the transmitted load-displacement curves and the results of particle size distribution analysis, the failure mechanism of quartz glass under double-particle impact was discussed. Due to the non-uniform load distribution in the double-particle system, the breakage of two glass beads demonstrated a time-varying characteristic, which changed with the increasing impact velocity. Despite of the conventional penetrating oblique crack system, the impact fracture of glass beads was caused by the local Hertz crack expansion and the crack system diffusion at the contact points. The fast infrared temperature measurement revealed two main fracture mechanisms and the existence of critical crushing diffusion resistance. This work has shown to be a significant reference for understanding the dynamic failure mechanism of brittle granular matter.
- impact dynamics /
- quartz glass beads /
- high-speed photography /
- particle size distribution /
- fragementation

HTML全文

图 1 SHPB实验装置

Figure 1. Schematic diagram of the modified SHPB device

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图 2 结合红外测温的SHPB实验装置

Figure 2. Modified SHPB with ITMS

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图 3 透射载荷-位移关系曲线

Figure 3. Transmitted load vs. displacement curves

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图 4 破碎产物质量分布曲线

Figure 4. Mass distribution of fragmentation products

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图 5 细颗粒产物的体积分布曲线

Figure 5. Volume distribution of finer particle products

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图 6 单颗粒冲击破碎（箭头为冲击方向）^[3]

Figure 6. Images of single sphere failure under impact (The arrow denotes the impact direction)^[3]

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图 7 双玻璃珠系的冲击破碎（箭头为冲击方向）

Figure 7. Images of double spheres failure under impact (The arrow denotes the impact direction)

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图 8 冲击产生的局部红外温升

Figure 8. Local infrared temperature rise generated during impact

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图 9 破碎阵面

Figure 9. Failure wave front

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