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| Content Provider | Springer Nature Link |
|---|---|
| Author | Asadi, M. S. Rasouli, V. Barla, G. |
| Copyright Year | 2012 |
| Abstract | Different failure modes during fracture shearing have been introduced including dilation, sliding, asperity cut-off and degradation. Several laboratory studies have reported the complexity of these failure modes during shear tests performed under either constant normal load (CNL) or constant normal stiffness (CNS) conditions. This paper is concerned with the mechanical behaviour of synthetic fractures during direct shear tests using a modified shear cell and related numerical simulation studies. The modifications made to an existing true triaxial stress cell (TTSC) in order to use it for performing shear tests under CNL conditions are presented. The large loading capacity and the use of accurate hydraulic pumps capable of applying a constant shear velocity are the main elements of this cell. Synthetic mortar specimens with different fracture surface geometries are tested to study the failure modes, including fracture sliding, asperity degradation, and to understand failure during shearing. A bonded particle model of the direct shear test with the PFC2D particle flow code is used to mimic the tests performed. The results of a number of tests are presented and compared with PFC2D simulations. The satisfactory results obtained both qualitatively and quantitatively are discussed. |
| Starting Page | 683 |
| Ending Page | 699 |
| Page Count | 17 |
| File Format | |
| ISSN | 07232632 |
| Journal | Rock Mechanics and Rock Engineering |
| Volume Number | 46 |
| Issue Number | 4 |
| e-ISSN | 1434453X |
| Language | English |
| Publisher | Springer Vienna |
| Publisher Date | 2012-12-27 |
| Publisher Place | Vienna |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fracture Direct shear test Roughness Asperity degradation PFC simulation Geophysics/Geodesy Civil Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geology Geotechnical Engineering and Engineering Geology Civil and Structural Engineering |
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