Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads
To research the dynamic response characteristics of cylindrical coal-rock samples under impact loads, the impact of rigid bars on cylindrical coal-rock samples is simulated under different speed conditions, based on LS-DYNA software, and the dynamic distribution characteristics of the stress, strain...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8820316 |
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| _version_ | 1832565376817299456 |
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| author | Hongqing Zhu Shuhao Fang Yilong Zhang Yan Wu |
| author_facet | Hongqing Zhu Shuhao Fang Yilong Zhang Yan Wu |
| author_sort | Hongqing Zhu |
| collection | DOAJ |
| description | To research the dynamic response characteristics of cylindrical coal-rock samples under impact loads, the impact of rigid bars on cylindrical coal-rock samples is simulated under different speed conditions, based on LS-DYNA software, and the dynamic distribution characteristics of the stress, strain, and energy of cylindrical coal-rock samples are analyzed. The results demonstrated the following: (1) the cylindrical coal-rock sample failed at the center first, and the damage developed downward along the axial direction. (2) The critical effective stress and strain have an exponential function relationship with the velocity, and the critical time has a linear relationship with the velocity. (3) The energy change law of the cylindrical coal-rock sample is consistent with the destruction morphology. (4) The axial stress peaks in the severe damage part have a linear relationship with the speed, the axial stress attenuates rapidly after passing the stress yield point, and the axial strain does not increase continuously. (5) The peaks stress and strain on the central axis and the radial line obey the power function distribution, the axial stress produces tensile stress in the axial propagation direction, and the axial stress and strain peaks at the same position are larger than those of the radial stress and strain peaks. This research provides a reference for studying coal and rock dynamic disasters. |
| format | Article |
| id | doaj-art-4578a84d49de4a9b8c7e376a505f6c87 |
| 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-4578a84d49de4a9b8c7e376a505f6c872025-02-03T01:07:57ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88203168820316Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic LoadsHongqing Zhu0Shuhao Fang1Yilong Zhang2Yan Wu3School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaSchool of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, ChinaTo research the dynamic response characteristics of cylindrical coal-rock samples under impact loads, the impact of rigid bars on cylindrical coal-rock samples is simulated under different speed conditions, based on LS-DYNA software, and the dynamic distribution characteristics of the stress, strain, and energy of cylindrical coal-rock samples are analyzed. The results demonstrated the following: (1) the cylindrical coal-rock sample failed at the center first, and the damage developed downward along the axial direction. (2) The critical effective stress and strain have an exponential function relationship with the velocity, and the critical time has a linear relationship with the velocity. (3) The energy change law of the cylindrical coal-rock sample is consistent with the destruction morphology. (4) The axial stress peaks in the severe damage part have a linear relationship with the speed, the axial stress attenuates rapidly after passing the stress yield point, and the axial strain does not increase continuously. (5) The peaks stress and strain on the central axis and the radial line obey the power function distribution, the axial stress produces tensile stress in the axial propagation direction, and the axial stress and strain peaks at the same position are larger than those of the radial stress and strain peaks. This research provides a reference for studying coal and rock dynamic disasters.http://dx.doi.org/10.1155/2020/8820316 |
| spellingShingle | Hongqing Zhu Shuhao Fang Yilong Zhang Yan Wu Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads Shock and Vibration |
| title | Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads |
| title_full | Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads |
| title_fullStr | Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads |
| title_full_unstemmed | Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads |
| title_short | Study on the Dynamic Response Characteristics of Cylindrical Coal-Rock Samples under Dynamic Loads |
| title_sort | study on the dynamic response characteristics of cylindrical coal rock samples under dynamic loads |
| url | http://dx.doi.org/10.1155/2020/8820316 |
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