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Computational verification of the optimum boundary condition of the Brazilian tensile test

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URI: https://hdl.handle.net/10016/35708
ISSN: 0723-2632
ISSN: 1434-453X (online)
DOI: https://doi.org/10.1007/s00603-018-1553-7
UXXI: AR/0000022677
UXXI: AR/0000022551
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computational_RMRE_2018_ps.pdf (1.09 MB)
computational_RMRE_2018_CORRECTION_ps.pdf (204.38 KB)
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2018-11
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Springer-Verlag GmbH Austria, part of Springer Nature
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Abstract
The present research analyses the configuration of jaws to avoid the premature failure of the disc in the Brazilian test. The objective is to depict the loading device configuration that most likely produces results comparable to the Hondros' analytical stress solution. To this end, several numerical analyses have been carried out for different contact angles with the finite element method. It was deduced that the final contact angle plays an important part in the success of the Brazilian test and that the Griffith criterion can be fulfilled if the equivalent stress is calculated. Additionally, the orientation of the forces in the contact between the loading device and the disc has been studied for different friction conditions. According to the numerical results, it was found that a loading arc configuration of 20 degrees shows the best agreement with the probable values given by the analytical stress model when the uncertainty of its magnitudes is taken into account. The study also demonstrates that the friction in the contact between the optimal loading configuration and the disc does not seem to significantly affect the theoretical predictions in the centre of the disc.
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Published correction to this article: Giutiérrez-Moizant, R., et al.: Correction to "Computational verification of the optimum boundary condition of the Brazilian tensile test". In: Rock mechanics and rock engineering, vol. 51(12), Dec. 2018, pp. 3983-3984
Keywords
Brazilian test, Crack initiation point, Equivalent stress, Comparison index
Bibliographic citation
Gutiérrez-Moizant, R., et al. Computational verification of the optimum boundary condition of the Brazilian tensile test. In: Rock mechanics and rock engineering, 51(11), Nov. 2018, pp. 3505-3519
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