Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates
Elastic parameters and the subcritical crack growth of different bedding angle slate specimens were studied using uniaxial compression testing and the double torsion constant displacement load relaxation method using SANS and MTS Insight machines. To study the relations of the mode-I stress intensit...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8843381 |
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| author | Gang Ma Jiangteng Li Huiwen Wang |
| author_facet | Gang Ma Jiangteng Li Huiwen Wang |
| author_sort | Gang Ma |
| collection | DOAJ |
| description | Elastic parameters and the subcritical crack growth of different bedding angle slate specimens were studied using uniaxial compression testing and the double torsion constant displacement load relaxation method using SANS and MTS Insight machines. To study the relations of the mode-I stress intensity factor KI versus the subcritical crack growth velocity V, the fracture toughness KIC, the stagnation speed, and the threshold values, the double torsion constant displacement load relaxation method was carried out. The related rules between the bedding angles (β) and the uniaxial compressive strength, fracture toughness, and threshold values were investigated. Experimental results show that the uniaxial compression, the fracture toughness, and the threshold value curves move to the bottom then increase with the increase of the β angle. In addition, its fracture toughness is minimal when the β angle of the slates is 45°, and crack initiation and crack propagation are generated under load, which can lead to the failure of the slate. lgKI-lgV relations of transversely isotropic slates measured by this method are in accordance with linear rules, which is in good agreement with the Charles theory. The range of K0/KIC for these different bedding angle slates is from 0.511 to 0.789. The test results would provide the basis for studying seepage and time-dependency of rock engineering stability. |
| format | Article |
| id | doaj-art-84adf729ff16444ab046e3c970c99ea7 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-84adf729ff16444ab046e3c970c99ea72025-02-03T06:45:50ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88433818843381Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic SlatesGang Ma0Jiangteng Li1Huiwen Wang2School of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha 410083, ChinaChina Design Group Co., Ltd., Nanjing 210000, ChinaElastic parameters and the subcritical crack growth of different bedding angle slate specimens were studied using uniaxial compression testing and the double torsion constant displacement load relaxation method using SANS and MTS Insight machines. To study the relations of the mode-I stress intensity factor KI versus the subcritical crack growth velocity V, the fracture toughness KIC, the stagnation speed, and the threshold values, the double torsion constant displacement load relaxation method was carried out. The related rules between the bedding angles (β) and the uniaxial compressive strength, fracture toughness, and threshold values were investigated. Experimental results show that the uniaxial compression, the fracture toughness, and the threshold value curves move to the bottom then increase with the increase of the β angle. In addition, its fracture toughness is minimal when the β angle of the slates is 45°, and crack initiation and crack propagation are generated under load, which can lead to the failure of the slate. lgKI-lgV relations of transversely isotropic slates measured by this method are in accordance with linear rules, which is in good agreement with the Charles theory. The range of K0/KIC for these different bedding angle slates is from 0.511 to 0.789. The test results would provide the basis for studying seepage and time-dependency of rock engineering stability.http://dx.doi.org/10.1155/2020/8843381 |
| spellingShingle | Gang Ma Jiangteng Li Huiwen Wang Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates Geofluids |
| title | Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates |
| title_full | Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates |
| title_fullStr | Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates |
| title_full_unstemmed | Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates |
| title_short | Related Rule Study of Subcritical Crack Growth and Threshold Values in Transversely Isotropic Slates |
| title_sort | related rule study of subcritical crack growth and threshold values in transversely isotropic slates |
| url | http://dx.doi.org/10.1155/2020/8843381 |
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