MECHANICAL BEHAVIOUR AND RUPTURE IN CLAYEY ROCKS STUDIED BY X-RAY MICRO-TOMOGRAPHY AND 3D-DIGITAL IMAGE CORRELATION

Nicolas Lenoir (1) , Gioacchino Cinno Viggiani (1) , Jacques Desrues (1) , Pierre Bésuelle (1) , Michel Bornert (2)

1 3SR - Laboratoire sols, solides, structures - risques [Grenoble]
2 LMS - Laboratoire de mécanique des solides

The mechanical behaviour and the rupture of clayey rocks have been experimentally studied by performing in situ triaxial tests on a synchrotron beamline i.e. performing X-ray micro tomography scans under mechanical loading. The 3D images obtained at different steps of the test were then analysed by 3D-Digital Image Correlation method in order to measure incremental strain fields. The results allow to clearly detect the onset of shear strain localization and to characterize its development in a 3D complex pattern.

Mots clés: Clayey rocks; X-ray micro-tomography; 3-D digital image correlation; In-situ triaxial test; Localization

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Nicolas Lenoir, Gioacchino Cinno Viggiani, Jacques Desrues, Pierre Bésuelle, Michel Bornert. MECHANICAL BEHAVIOUR AND RUPTURE IN CLAYEY ROCKS STUDIED BY X-RAY MICRO-TOMOGRAPHY AND 3D-DIGITAL IMAGE CORRELATION. W(H)YDOC 08 : 3rd international workshop of young doctors in geomechanics, Nov 2008, France. pp. 35-38. ⟨hal-00510542⟩