The Brazilian disc test for rock mechanics applications : review and new insights
The development of the Brazilian disc test for determining indirect tensile strength and its applications in rock mechanics are reviewed herein. Based on the history of research on the Brazilian test by analytical, experimental, and numerical approaches, three research stages can be identified. Most...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/97836 http://hdl.handle.net/10220/12200 |
| _version_ | 1824454418235392000 |
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| author | Li, Diyuan Wong, Louis Ngai Yuen |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Li, Diyuan Wong, Louis Ngai Yuen |
| author_sort | Li, Diyuan |
| collection | NTU |
| description | The development of the Brazilian disc test for determining indirect tensile strength and its applications in rock mechanics are reviewed herein. Based on the history of research on the Brazilian test by analytical, experimental, and numerical approaches, three research stages can be identified. Most of the early studies focused on the tensile stress distribution in Brazilian disc specimens, while ignoring the tensile strain distribution. The observation of different crack initiation positions in the Brazilian disc has drawn a lot of research interest from the rock mechanics community. A simple extension strain criterion was put forward by Stacey (Int J Rock Mech Min Sci Geomech Abstr 18(6):469–474, 1981) to account for extension crack initiation and propagation in rocks, although this is not widely used. In the present study, a linear elastic numerical model is constructed to study crack initiation in a 50-mm-diameter Brazilian disc using FLAC3D. The maximum tensile stress and the maximum tensile strain are both found to occur about 5 mm away from the two loading points along the compressed diameter of the disc, instead of at the center of the disc surface. Therefore, the crack initiation point of the Brazilian test for rocks may be located near the loading point when the tensile strain meets the maximum extension strain criterion, but at the surface center when the tensile stress meets the maximum tensile strength criterion. |
| first_indexed | 2025-02-19T03:22:00Z |
| format | Journal Article |
| id | ntu-10356/97836 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:22:00Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/978362020-03-07T11:43:42Z The Brazilian disc test for rock mechanics applications : review and new insights Li, Diyuan Wong, Louis Ngai Yuen School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering The development of the Brazilian disc test for determining indirect tensile strength and its applications in rock mechanics are reviewed herein. Based on the history of research on the Brazilian test by analytical, experimental, and numerical approaches, three research stages can be identified. Most of the early studies focused on the tensile stress distribution in Brazilian disc specimens, while ignoring the tensile strain distribution. The observation of different crack initiation positions in the Brazilian disc has drawn a lot of research interest from the rock mechanics community. A simple extension strain criterion was put forward by Stacey (Int J Rock Mech Min Sci Geomech Abstr 18(6):469–474, 1981) to account for extension crack initiation and propagation in rocks, although this is not widely used. In the present study, a linear elastic numerical model is constructed to study crack initiation in a 50-mm-diameter Brazilian disc using FLAC3D. The maximum tensile stress and the maximum tensile strain are both found to occur about 5 mm away from the two loading points along the compressed diameter of the disc, instead of at the center of the disc surface. Therefore, the crack initiation point of the Brazilian test for rocks may be located near the loading point when the tensile strain meets the maximum extension strain criterion, but at the surface center when the tensile stress meets the maximum tensile strength criterion. 2013-07-25T04:17:59Z 2019-12-06T19:47:13Z 2013-07-25T04:17:59Z 2019-12-06T19:47:13Z 2012 2012 Journal Article Li, D., & Wong, L. N. Y. (2013). The Brazilian Disc Test for Rock Mechanics Applications: Review and New Insights. Rock Mechanics and Rock Engineering, 46(2), 269-287. https://hdl.handle.net/10356/97836 http://hdl.handle.net/10220/12200 10.1007/s00603-012-0257-7 en Rock mechanics and rock engineering © 2012 Springer-Verlag. |
| spellingShingle | DRNTU::Engineering::Environmental engineering Li, Diyuan Wong, Louis Ngai Yuen The Brazilian disc test for rock mechanics applications : review and new insights |
| title | The Brazilian disc test for rock mechanics applications : review and new insights |
| title_full | The Brazilian disc test for rock mechanics applications : review and new insights |
| title_fullStr | The Brazilian disc test for rock mechanics applications : review and new insights |
| title_full_unstemmed | The Brazilian disc test for rock mechanics applications : review and new insights |
| title_short | The Brazilian disc test for rock mechanics applications : review and new insights |
| title_sort | brazilian disc test for rock mechanics applications review and new insights |
| topic | DRNTU::Engineering::Environmental engineering |
| url | https://hdl.handle.net/10356/97836 http://hdl.handle.net/10220/12200 |
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