Crack propagation and scale effect of random fractured rock under compression-shear loading
Fractures and rock blocks are the essential components of rock mass, random fractured rock is the general manifestation of fractured rock mass, which is particularly significant in scale effect. To facilitate the tests, most of the previous studies on fractured rock mass were conducted on regular fr...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-03-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423003381 |
| _version_ | 1797858754788589568 |
|---|---|
| author | Yifan Chen Biyang Sheng Shijie Xie Rihong Cao Yixian Wang Yanlin Zhao Hang Lin |
| author_facet | Yifan Chen Biyang Sheng Shijie Xie Rihong Cao Yixian Wang Yanlin Zhao Hang Lin |
| author_sort | Yifan Chen |
| collection | DOAJ |
| description | Fractures and rock blocks are the essential components of rock mass, random fractured rock is the general manifestation of fractured rock mass, which is particularly significant in scale effect. To facilitate the tests, most of the previous studies on fractured rock mass were conducted on regular fractured rocks, which is not conducive to fully revealing the mechanical properties and failure characteristics of fractured rock mass. In this paper, the random fractured rock samples were produced with rock-like materials to investigate the fracture propagation and scale effect under compression-shear condition. Specifically, the samples were loaded by controlling the compression-shear angle to study the mechanical responses. In the test, speckle changes on the samples surface were recorded in real time, and the evolution of strain field was analyzed by digital image processing technology. Then, the internal relations among compression-shear angle, fracture distribution and crack propagation were discussed. Meanwhile, the failure modes of the random fractured samples with different compression-shear angles were summarized to reveal the influence of compression-shear angle on failure mode. Combined with PFC2D, the random fractured rock models of different scales were established to explore the mechanical characteristic variation, and the representative elementary volume of shear modulus was finally determined. |
| first_indexed | 2024-04-09T21:18:30Z |
| format | Article |
| id | doaj.art-80327b96702949fba1bcfdc241baf6b7 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-09T21:18:30Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-80327b96702949fba1bcfdc241baf6b72023-03-28T06:48:14ZengElsevierJournal of Materials Research and Technology2238-78542023-03-012351645180Crack propagation and scale effect of random fractured rock under compression-shear loadingYifan Chen0Biyang Sheng1Shijie Xie2Rihong Cao3Yixian Wang4Yanlin Zhao5Hang Lin6School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, ChinaSchool of Civil Engineering, Hefei University of Technology, Hefei, 230009, ChinaSchool of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan, 411201, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China; Corresponding author.Fractures and rock blocks are the essential components of rock mass, random fractured rock is the general manifestation of fractured rock mass, which is particularly significant in scale effect. To facilitate the tests, most of the previous studies on fractured rock mass were conducted on regular fractured rocks, which is not conducive to fully revealing the mechanical properties and failure characteristics of fractured rock mass. In this paper, the random fractured rock samples were produced with rock-like materials to investigate the fracture propagation and scale effect under compression-shear condition. Specifically, the samples were loaded by controlling the compression-shear angle to study the mechanical responses. In the test, speckle changes on the samples surface were recorded in real time, and the evolution of strain field was analyzed by digital image processing technology. Then, the internal relations among compression-shear angle, fracture distribution and crack propagation were discussed. Meanwhile, the failure modes of the random fractured samples with different compression-shear angles were summarized to reveal the influence of compression-shear angle on failure mode. Combined with PFC2D, the random fractured rock models of different scales were established to explore the mechanical characteristic variation, and the representative elementary volume of shear modulus was finally determined.http://www.sciencedirect.com/science/article/pii/S2238785423003381Random fractured rockCompression-shear testNumerical simulationCrack propagationScale effect |
| spellingShingle | Yifan Chen Biyang Sheng Shijie Xie Rihong Cao Yixian Wang Yanlin Zhao Hang Lin Crack propagation and scale effect of random fractured rock under compression-shear loading Journal of Materials Research and Technology Random fractured rock Compression-shear test Numerical simulation Crack propagation Scale effect |
| title | Crack propagation and scale effect of random fractured rock under compression-shear loading |
| title_full | Crack propagation and scale effect of random fractured rock under compression-shear loading |
| title_fullStr | Crack propagation and scale effect of random fractured rock under compression-shear loading |
| title_full_unstemmed | Crack propagation and scale effect of random fractured rock under compression-shear loading |
| title_short | Crack propagation and scale effect of random fractured rock under compression-shear loading |
| title_sort | crack propagation and scale effect of random fractured rock under compression shear loading |
| topic | Random fractured rock Compression-shear test Numerical simulation Crack propagation Scale effect |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423003381 |
| work_keys_str_mv | AT yifanchen crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading AT biyangsheng crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading AT shijiexie crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading AT rihongcao crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading AT yixianwang crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading AT yanlinzhao crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading AT hanglin crackpropagationandscaleeffectofrandomfracturedrockundercompressionshearloading |