DDA simulation study on fracturing failure reproducibility of heterogenous rock
The mesoscale heterogeneity of rock determines its macroscale mechanical performance to a large extent. In this paper, a sub-block element discontinuous deformation analysis (DDA) method coupled with a statistic heterogeneity model was used to simulate the fracturing failure of pre-notched rock spec...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1076023/full |
| _version_ | 1797944039634370560 |
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| author | Dayong Chen Zheng Yang Mingke Wang Xufei Jiang Youjun Ning |
| author_facet | Dayong Chen Zheng Yang Mingke Wang Xufei Jiang Youjun Ning |
| author_sort | Dayong Chen |
| collection | DOAJ |
| description | The mesoscale heterogeneity of rock determines its macroscale mechanical performance to a large extent. In this paper, a sub-block element discontinuous deformation analysis (DDA) method coupled with a statistic heterogeneity model was used to simulate the fracturing failure of pre-notched rock specimens. The simulation recreated the macroscale whole-process nonlinear deformation and fracturing failure of pre-notched disc and rectangular specimens with some important features explored in experiments or other numerical simulations. Combing intact heterogeneous rock specimen simulations in previous work, the effect of the heterogeneity on the reproducibility of macroscale strength and failure patterns of the specimens were investigated. Results indicate that the influence degree of the heterogeneity on the macroscale equivalent strength and fracturing failure pattern reproducibility varies with the specimen particularities (disc or rectangular, pre-notched or intact, and inclination of the pre-existing flaw), and the reason behind was discussed from the point view of stress concentration. This work is meaningful for the understanding of the result discreteness of rock specimen experiments, and assures the importance to consider the rock heterogeneity in practical rock engineering. |
| first_indexed | 2024-04-10T20:33:27Z |
| format | Article |
| id | doaj.art-fd14f2816ac544ddbd4e61a62d4a17d5 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T20:33:27Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-fd14f2816ac544ddbd4e61a62d4a17d52023-01-25T05:11:16ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10760231076023DDA simulation study on fracturing failure reproducibility of heterogenous rockDayong Chen0Zheng Yang1Mingke Wang2Xufei Jiang3Youjun Ning4State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, Chengdu, Sichuan, ChinaThe mesoscale heterogeneity of rock determines its macroscale mechanical performance to a large extent. In this paper, a sub-block element discontinuous deformation analysis (DDA) method coupled with a statistic heterogeneity model was used to simulate the fracturing failure of pre-notched rock specimens. The simulation recreated the macroscale whole-process nonlinear deformation and fracturing failure of pre-notched disc and rectangular specimens with some important features explored in experiments or other numerical simulations. Combing intact heterogeneous rock specimen simulations in previous work, the effect of the heterogeneity on the reproducibility of macroscale strength and failure patterns of the specimens were investigated. Results indicate that the influence degree of the heterogeneity on the macroscale equivalent strength and fracturing failure pattern reproducibility varies with the specimen particularities (disc or rectangular, pre-notched or intact, and inclination of the pre-existing flaw), and the reason behind was discussed from the point view of stress concentration. This work is meaningful for the understanding of the result discreteness of rock specimen experiments, and assures the importance to consider the rock heterogeneity in practical rock engineering.https://www.frontiersin.org/articles/10.3389/feart.2022.1076023/fullrock fracturing failureheterogeneityreproducibilitypre-existing flawdiscontinuous deformation analysis (DDA) |
| spellingShingle | Dayong Chen Zheng Yang Mingke Wang Xufei Jiang Youjun Ning DDA simulation study on fracturing failure reproducibility of heterogenous rock Frontiers in Earth Science rock fracturing failure heterogeneity reproducibility pre-existing flaw discontinuous deformation analysis (DDA) |
| title | DDA simulation study on fracturing failure reproducibility of heterogenous rock |
| title_full | DDA simulation study on fracturing failure reproducibility of heterogenous rock |
| title_fullStr | DDA simulation study on fracturing failure reproducibility of heterogenous rock |
| title_full_unstemmed | DDA simulation study on fracturing failure reproducibility of heterogenous rock |
| title_short | DDA simulation study on fracturing failure reproducibility of heterogenous rock |
| title_sort | dda simulation study on fracturing failure reproducibility of heterogenous rock |
| topic | rock fracturing failure heterogeneity reproducibility pre-existing flaw discontinuous deformation analysis (DDA) |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1076023/full |
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