期刊
ROCK MECHANICS AND ROCK ENGINEERING
卷 51, 期 2, 页码 361-373出版社
SPRINGER WIEN
DOI: 10.1007/s00603-017-1345-5
关键词
Brazilian test; Bi-modularity; Tensile elastic modulus; Tensile Poisson's ratio; Digital image correlation technique
资金
- Swedish Nuclear Fuel and Waste Management Co. (SKB) Sweden
- Canadian Nuclear Waste Management Organization (NWMO)
- Natural Sciences and Engineering Research Council of Canada (NSERC)
Unlike metals, rocks show bi-modularity (different Young's moduli and Poisson's ratios in compression and tension). Displacements monitored during the Brazilian test are used in this study to obtain the Young's modulus and Poisson's ratio in tension. New equations for the displacements in a Brazilian test are derived considering the bi-modularity in the stress-strain relations. The digital image correlation technique was used to monitor the displacements of the Brazilian disk flat surface. To validate the Young's modulus and Poisson's ratio obtained from the Brazilian test, the results were compared with the values from the direct tension tests. The results obtained from the Brazilian test were repetitive and within 3.5% of the value obtained from the direct tension test for the rock tested.
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