Fig. 3From: Geomechanical behaviour of Opalinus Clay at multiple scales: results from Mont Terri rock laboratory (Switzerland)Adapted from Amann et al. (2012a), 27/30, copyright Springer-Verlag 2011, with permission of Springer a Axial stress–volumetric strain curves before failure for different confining stresses. b Failure strength and onset of dilatancy in dependency of the confining stress.Back to article page