Evaluation of Tensile Young’s Modulus and Poisson’s Ratio of a Bi-modular Rock from the Displacement Measurements in a Brazilian Test

Evaluation of Tensile Young’s Modulus and Poisson’s Ratio of a Bi-modular Rock from the... 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Rock Mechanics and Rock Engineering Springer Journals

Evaluation of Tensile Young’s Modulus and Poisson’s Ratio of a Bi-modular Rock from the Displacement Measurements in a Brazilian Test

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Publisher
Springer Vienna
Copyright
Copyright © 2017 by Springer-Verlag GmbH Austria
Subject
Earth Sciences; Geophysics/Geodesy; Civil Engineering
ISSN
0723-2632
eISSN
1434-453X
D.O.I.
10.1007/s00603-017-1345-5
Publisher site
See Article on Publisher Site

Abstract

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.

Journal

Rock Mechanics and Rock EngineeringSpringer Journals

Published: Oct 23, 2017

References

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