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. http://doi.org/10.1155/2020/8899355
Energy dissipation and particle size distribution of granite under different incident energies in SHPB compression tests
|Author:||Gong, Fengqiang1,2; Jia, Hangyu1; Zhang, Zongxian3;|
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
|Online Access:||PDF Full Text (PDF, 9.7 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202102104427
|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.
Shock and vibration
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
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).
© 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.