Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture
To investigate the energy evolution and storage characteristics of the rock during the mixed-mode fracture failure, several single loading-unloading tests under preset different unloading levels were conducted on the cracked straight-through Brazilian disc (CSTBD) red-sandstone specimen with crack i...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/9822469 |
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| author | Wuxing Wu Fengqiang Gong |
| author_facet | Wuxing Wu Fengqiang Gong |
| author_sort | Wuxing Wu |
| collection | DOAJ |
| description | To investigate the energy evolution and storage characteristics of the rock during the mixed-mode fracture failure, several single loading-unloading tests under preset different unloading levels were conducted on the cracked straight-through Brazilian disc (CSTBD) red-sandstone specimen with crack inclination angles of 10° and 20°. The input energy, elastic energy, and dissipated energy parameters were obtained by calculating the area integral of the load-displacement curve. Test results display that the total input energy, elastic energy, and dissipated energy of rock specimens increase in quadratic function with the increase of unloading level at different unloading levels. It was found that there are significant linear energy storage and dissipation laws of rock during the mixed-mode fracture process. The concepts of fracture energy storage coefficient (FESC) and fracture energy dissipation coefficient (FEDC) were proposed to express the energy variation of rock in the prepeak stage. Under the same loading conditions, FESC and FEDC remain unchanged regardless of crack inclination angles, indicating that the linear energy storage and dissipation laws are an inherent property of the rock. Besides, the peak fracture elastic-dissipation index Wed (the ratio of peak elastic energy to peak dissipation energy) was obtained through quantitative analysis and demonstrated its invariant feature. |
| format | Article |
| id | doaj-art-7bd7b33102d44a42abb8870b6c63d87b |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-7bd7b33102d44a42abb8870b6c63d87b2025-08-20T03:35:44ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/9822469Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode FractureWuxing Wu0Fengqiang Gong1Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education (ERCSPEIME)Engineering Research Center of Safety and Protection of Explosion & Impact of Ministry of Education (ERCSPEIME)To investigate the energy evolution and storage characteristics of the rock during the mixed-mode fracture failure, several single loading-unloading tests under preset different unloading levels were conducted on the cracked straight-through Brazilian disc (CSTBD) red-sandstone specimen with crack inclination angles of 10° and 20°. The input energy, elastic energy, and dissipated energy parameters were obtained by calculating the area integral of the load-displacement curve. Test results display that the total input energy, elastic energy, and dissipated energy of rock specimens increase in quadratic function with the increase of unloading level at different unloading levels. It was found that there are significant linear energy storage and dissipation laws of rock during the mixed-mode fracture process. The concepts of fracture energy storage coefficient (FESC) and fracture energy dissipation coefficient (FEDC) were proposed to express the energy variation of rock in the prepeak stage. Under the same loading conditions, FESC and FEDC remain unchanged regardless of crack inclination angles, indicating that the linear energy storage and dissipation laws are an inherent property of the rock. Besides, the peak fracture elastic-dissipation index Wed (the ratio of peak elastic energy to peak dissipation energy) was obtained through quantitative analysis and demonstrated its invariant feature.http://dx.doi.org/10.1155/2022/9822469 |
| spellingShingle | Wuxing Wu Fengqiang Gong Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture Geofluids |
| title | Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture |
| title_full | Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture |
| title_fullStr | Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture |
| title_full_unstemmed | Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture |
| title_short | Investigation on Energy Evolution and Storage Characteristic of CSTBD Red Sandstone during Mixed-Mode Fracture |
| title_sort | investigation on energy evolution and storage characteristic of cstbd red sandstone during mixed mode fracture |
| url | http://dx.doi.org/10.1155/2022/9822469 |
| work_keys_str_mv | AT wuxingwu investigationonenergyevolutionandstoragecharacteristicofcstbdredsandstoneduringmixedmodefracture AT fengqianggong investigationonenergyevolutionandstoragecharacteristicofcstbdredsandstoneduringmixedmodefracture |