Volume 35 Issue 2
Mar 2021
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JIAN Shihao, MIAO Chunhe, ZHANG Lei, SHAN Junfang, WANG Pengfei, XU Songlin. Fragmentation of Double Quartz Glass Spheres Subjected to Lower-Velocity Impact[J]. Chinese Journal of High Pressure Physics, 2021, 35(2): 024202. doi: 10.11858/gywlxb.20200629
Citation: JIAN Shihao, MIAO Chunhe, ZHANG Lei, SHAN Junfang, WANG Pengfei, XU Songlin. Fragmentation of Double Quartz Glass Spheres Subjected to Lower-Velocity Impact[J]. Chinese Journal of High Pressure Physics, 2021, 35(2): 024202. doi: 10.11858/gywlxb.20200629

Fragmentation of Double Quartz Glass Spheres Subjected to Lower-Velocity Impact

doi: 10.11858/gywlxb.20200629
  • Received Date: 27 Oct 2020
  • Rev Recd Date: 06 Nov 2020
  • 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.

     

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