Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load
Before rock burst, coal, and gas outburst dynamic load, rock mass in geotechnical engineering has been an indifferent degree of damage. The dissipation energy of rock mass under dynamic load reflects the difficulty of rock breaking. In view of the energy dissipation of damaged rock mass under dynami...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/4200452 |
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| _version_ | 1832549158564659200 |
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| author | Feng Wang Haibo Wang Ying Xu Bing Cheng Qianqian Wang |
| author_facet | Feng Wang Haibo Wang Ying Xu Bing Cheng Qianqian Wang |
| author_sort | Feng Wang |
| collection | DOAJ |
| description | Before rock burst, coal, and gas outburst dynamic load, rock mass in geotechnical engineering has been an indifferent degree of damage. The dissipation energy of rock mass under dynamic load reflects the difficulty of rock breaking. In view of the energy dissipation of damaged rock mass under dynamic load, the cyclic loading and unloading test is carried out to make sandstone in different damage states, and the damage degree of sandstone is characterized by the change of longitudinal wave velocity before and after cyclic loading and unloading. Then, the rock with different damage degrees is tested by adopting the split Hopkinson pressure bar (SHPB). Finally, the energy dissipation characteristics of damaged rock under impact load are analyzed. The results show that the damage factor of sandstone increases with the increase of the upper limit of stress after cyclic static loading. The dynamic strength and peak strain of damaged sandstone increase with the increase of impact pressure and decrease with the increase of damage degree. With the increase of damage degree of sandstone, the reflection energy and dissipation energy of sandstone increase, while the transmission energy decreases. |
| format | Article |
| id | doaj-art-4e5a79dcb7bc49fc9bd63131a806ef14 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-4e5a79dcb7bc49fc9bd63131a806ef142025-02-03T06:12:05ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/42004524200452Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact LoadFeng Wang0Haibo Wang1Ying Xu2Bing Cheng3Qianqian Wang4State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaBefore rock burst, coal, and gas outburst dynamic load, rock mass in geotechnical engineering has been an indifferent degree of damage. The dissipation energy of rock mass under dynamic load reflects the difficulty of rock breaking. In view of the energy dissipation of damaged rock mass under dynamic load, the cyclic loading and unloading test is carried out to make sandstone in different damage states, and the damage degree of sandstone is characterized by the change of longitudinal wave velocity before and after cyclic loading and unloading. Then, the rock with different damage degrees is tested by adopting the split Hopkinson pressure bar (SHPB). Finally, the energy dissipation characteristics of damaged rock under impact load are analyzed. The results show that the damage factor of sandstone increases with the increase of the upper limit of stress after cyclic static loading. The dynamic strength and peak strain of damaged sandstone increase with the increase of impact pressure and decrease with the increase of damage degree. With the increase of damage degree of sandstone, the reflection energy and dissipation energy of sandstone increase, while the transmission energy decreases.http://dx.doi.org/10.1155/2021/4200452 |
| spellingShingle | Feng Wang Haibo Wang Ying Xu Bing Cheng Qianqian Wang Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load Shock and Vibration |
| title | Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load |
| title_full | Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load |
| title_fullStr | Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load |
| title_full_unstemmed | Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load |
| title_short | Analysis of Energy Dissipation Characteristics of Damaged Sandstone under Impact Load |
| title_sort | analysis of energy dissipation characteristics of damaged sandstone under impact load |
| url | http://dx.doi.org/10.1155/2021/4200452 |
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