Numéro |
J. Phys. IV France
Volume 105, March 2003
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Page(s) | 321 - 328 | |
DOI | https://doi.org/10.1051/jp4:20030203 |
J. Phys. IV France 105 (2003) 321
DOI: 10.1051/jp4:20030203
Anisotropic damage formation in brittle rock: Experimental study by means of acoustic emission and Kaiser effect
A. Lavrov1, 2, A. Vervoort1 and M. Wevers31 Katholieke Universiteit Leuven, Department of Civil Engineering, Kasteelpark Arenberg 40, 3001 Heverlee, Belgium
2 Moscow State Mining University, Physical and Engineering Department, Leninski Prospect 6, Moscow 119991, GSP-1, Russia
3 Katholieke Universiteit Leuven, Department of Metallurgy and Materials Engineering, Kasteelpark Arenberg 40, 3001 Heverlee, Belgium
Abstract
Compressive or tensile loading of rocks results in anisotropic damage represented by microcracks. Disk
specimens of a brittle limestone are initially loaded diametrically, introducing damage as recorded by acoustic
emission measurements. Upon unloading, prismatic specimens are cut from the disks in different directions and
are tested in uniaxial compression while measuring simultaneously the acoustic emission. An attempt is made to
reveal the damage formed under triaxial loading with one of the principal stresses being tensile, by using the
Kaiser effect in compressive uniaxial reloading. The results are of importance for the Kaiser effect applications
for stress measurements in rocks where one of the principal stresses is tensile.
© EDP Sciences 2003