Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics
The effect of the bedding structure on the mechanical properties of layered shale was studied by means of experiment and numerical simulation. Based on continuum damage theory and discrete fracture network modeling method (D-DFN), a finite element model describing structural discontinuity and mechan...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5714547 |
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| author | Qinglin Shan Peng Yan Hengjie Luan Yujing Jiang Sunhao Zhang |
| author_facet | Qinglin Shan Peng Yan Hengjie Luan Yujing Jiang Sunhao Zhang |
| author_sort | Qinglin Shan |
| collection | DOAJ |
| description | The effect of the bedding structure on the mechanical properties of layered shale was studied by means of experiment and numerical simulation. Based on continuum damage theory and discrete fracture network modeling method (D-DFN), a finite element model describing structural discontinuity and mechanical anisotropy of shale is established. In this model, the degradation process of stiffness and strength of shale after failure is described based on the stress-displacement relationship of elements. In order to distinguish the mechanical properties between the bedding and the matrix, a nonzero initial damage variable is set in bedding elements to show initial lower elastic modulus and strength of bedding elements compared with initially nondamaged matrix elements. The calibration of model parameters is discussed, and the simulation results are compared with the experimental results. The results show that the D-DFN method can effectively simulate the anisotropic characteristics of shale deformation and strength, which verifies the effectiveness of the method. |
| format | Article |
| id | doaj-art-962950c6d754425ba895adf913489c6b |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-962950c6d754425ba895adf913489c6b2025-02-03T05:45:28ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/57145475714547Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage MechanicsQinglin Shan0Peng Yan1Hengjie Luan2Yujing Jiang3Sunhao Zhang4State Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaState Key Laboratory of Mining Disaster Prevention and Control Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, ChinaThe effect of the bedding structure on the mechanical properties of layered shale was studied by means of experiment and numerical simulation. Based on continuum damage theory and discrete fracture network modeling method (D-DFN), a finite element model describing structural discontinuity and mechanical anisotropy of shale is established. In this model, the degradation process of stiffness and strength of shale after failure is described based on the stress-displacement relationship of elements. In order to distinguish the mechanical properties between the bedding and the matrix, a nonzero initial damage variable is set in bedding elements to show initial lower elastic modulus and strength of bedding elements compared with initially nondamaged matrix elements. The calibration of model parameters is discussed, and the simulation results are compared with the experimental results. The results show that the D-DFN method can effectively simulate the anisotropic characteristics of shale deformation and strength, which verifies the effectiveness of the method.http://dx.doi.org/10.1155/2021/5714547 |
| spellingShingle | Qinglin Shan Peng Yan Hengjie Luan Yujing Jiang Sunhao Zhang Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics Geofluids |
| title | Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics |
| title_full | Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics |
| title_fullStr | Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics |
| title_full_unstemmed | Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics |
| title_short | Characterization of Discontinuity and Mechanical Anisotropy of Shale Based on Continuum Damage Mechanics |
| title_sort | characterization of discontinuity and mechanical anisotropy of shale based on continuum damage mechanics |
| url | http://dx.doi.org/10.1155/2021/5714547 |
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