University of Oulu

Gong, F., Jia, H., Zhang, Z., Hu, J., Luo, S. (2020) Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests. Shock and Vibration, 2020, 1-14.

Energy dissipation and particle size distribution of granite under different incident energies in SHPB compression tests

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Author: Gong, Fengqiang1,2; Jia, Hangyu1; Zhang, Zongxian3;
Organizations: 1School of Resources and Safety Engineering, Central South University, Changsha 410083, China
2School of Civil Engineering, Southeast University, Nanjing 211189, China
3Oulu Mining School, University of Oulu, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 9.7 MB)
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Language: English
Published: Hindawi, 2020
Publish Date: 2021-02-10


To investigate energy dissipation and particle size distribution of rock under dynamic loads, a series of dynamic compression tests of granite specimens were conducted using a conventional split-Hopkinson pressure bar (SHPB) device with a high-speed camera. The experimental results show that the dissipated energy increases linearly with an increasing incident energy, following two different inclined paths connected by a critical incident energy, and the linear energy dissipation law in the dynamic compression test has been confirmed. This critical incident energy was found to be 0.29–0.33 MJ/m³. As the incident energy was smaller than the critical incident energy, the rock specimens remained unruptured after the impact. When the incident energy was greater than the critical incident energy, the rock specimens were ruptured or fragmented after the impact. In addition, the experimental results indicate that the dissipated energy and energy consumption ratio of a rock specimen, either unruptured or fragmented, increase with an increasing strain rate. Furthermore, it was found that fragment sizes at each mesh decrease with an increasing incident energy; that is, fragmentation becomes finer as incident energy increases.

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Series: Shock and vibration
ISSN: 1070-9622
ISSN-E: 1875-9203
ISSN-L: 1070-9622
Volume: 2020
Article number: 8899355
DOI: 10.1155/2020/8899355
Type of Publication: A1 Journal article – refereed
Field of Science: 1171 Geosciences
Funding: This study was supported by the National Natural Science Foundation of China (Grant no. 41877272), the Fundamental Research Funds for the Central Universities of Central South University (Grant no. 2020zzts716), and the Fundamental Research Funds for the Central Universities of Southeast University (Grant no. 2242020R10023).
Copyright information: © 2020 Fengqiang Gong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.