3. Experiments on Strength and Softening Response of Rock

Joseph Labuz


Mechanical behavior of rock is reviewed and approaches to measure material and system response are highlighted. A non-traditional testing method that involves biaxial deformation developed through a Vardoulakis-Goldscheider plane strain apparatus is used to assess dilatancy and friction, as well as dilatancy of the shear band after localization. The Paul-Mohr-Coulomb failure criterion, which includes the intermediate stress, is applied to interpret the stress states at failure. Post-peak response, often referred to as softening, is explained as a size effect using a cohesive crack model.


Supporting organization



Prof. Lyesse Laloui, EPFL
Prof. Alessio Ferrari, EPFL

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