Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests
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 dis...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8899355 |
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| _version_ | 1832567921375707136 |
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| author | Fengqiang Gong Hangyu Jia Zongxian Zhang Jian Hu Song Luo |
| author_facet | Fengqiang Gong Hangyu Jia Zongxian Zhang Jian Hu Song Luo |
| author_sort | Fengqiang Gong |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-228af6495ace4838808792d43767e834 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-228af6495ace4838808792d43767e8342025-02-03T01:00:12ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88993558899355Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression TestsFengqiang Gong0Hangyu Jia1Zongxian Zhang2Jian Hu3Song Luo4School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaOulu Mining School, University of Oulu, Oulu, FinlandSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaTo 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.http://dx.doi.org/10.1155/2020/8899355 |
| spellingShingle | Fengqiang Gong Hangyu Jia Zongxian Zhang Jian Hu Song Luo Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests Shock and Vibration |
| title | Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests |
| title_full | Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests |
| title_fullStr | Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests |
| title_full_unstemmed | Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests |
| title_short | Energy Dissipation and Particle Size Distribution of Granite under Different Incident Energies in SHPB Compression Tests |
| title_sort | energy dissipation and particle size distribution of granite under different incident energies in shpb compression tests |
| url | http://dx.doi.org/10.1155/2020/8899355 |
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