Experimental study of inelastic deformation at the micro scale in cemented granular materials: some recent results
Document typeConference report
Rights accessOpen Access
A novel thermomechanical constitutive model for cemented granular materials has been recently introduced. An essential ingredient of the model is the use of measurable and micro-mechanics based internal variables describing the evolution of dominant inelastic processes. In this paper, discuss about the model ability to reproduce material behaviour at specimens scale starting from a few physically meaningful parameters. These parameters link the macroscopic mechanical behaviour to the statistically averaged evolution of the micro structure. However, to fully justify this statement and given the bottom-up hierarchy in the model development, it is also important to check the model’s capability to capture the statistically averaged evolution of the micro structure embedded at its base. For that purpose we have used high resolution x-ray tomography to scan artiﬁcially cemented granular materials under a variety of loading conditions. X-Ray Tomography has been chosen for its capability to track inelastic processes in granular materials non destructively with a high spatial resolution (a few microns, in this study). The main objective of this work is to introduce the key features of the constitutive model and to report some recent results on the experimental quantiﬁcation of the evolution of the microscopic internal variables in cemented granular materials.