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https://hdl.handle.net/2440/102128
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Type: | Conference paper |
Title: | New brittleness indices to describe rock failure under compressive load |
Author: | Taheri, A. Munoz, H. |
Citation: | Proceedings of the 2nd International Conference on Rock Dynamics and Applications, 2016 / Li, H., Li, J., Zhang, Q., Zhao, J. (ed./s), pp.489-494 |
Publisher: | CRC Press |
Issue Date: | 2016 |
ISBN: | 9781138029538 |
Conference Name: | Rock Dynamics: From Research to Engineering (18 May 2016 - 19 May 2016 : Suzhou, China) |
Editor: | Li, H. Li, J. Zhang, Q. Zhao, J. |
Statement of Responsibility: | A. Taheri and H. Munoz |
Abstract: | Brittleness is an important mechanical property of rock. There are several brittleness criteria exist to characterize rock failure based on rock mechanical properties. However, there is not a unique criterion available able to describe quantitative rock brittleness. In this study different rocks with uniaxial compressive strength values ranging between 7-215 MPa were tested to measure pre-peak and post-peak stress-strain relations. A stiff servo-controlled machine was used to undertake lateral displacement controlled tests. Postpeak stress-strain relations were obtained accurately using three-dimensional digital image correlation technique. Several brittleness indices were proposed based on pre-peak energy, elastic energy and post-peak energy. Analysing of the results demonstrated that a pre-peak stress-strain brittleness index proposed solely based on pre-peak stress-strain behaviour doesn’t show any correlation with rock peak strength. On the other hand, the proposed brittleness indices based on pre-peak and post-peak stress-strain relations were found to competently describe an unambiguous brittleness scale against rock strength. |
Rights: | © 2016 Taylor & Francis Group |
DOI: | 10.1201/b21378-74 |
Published version: | http://dx.doi.org/10.1201/b21378-74 |
Appears in Collections: | Aurora harvest 7 Civil and Environmental Engineering publications |
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