Gioacchino Viggiani

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Keywords: Micro-structures Constitutive behavior Granular material Multiscale X-ray computed tomography a b s t r a c t Granular sands are characterized and modeled here by explicitly exploiting the discrete-continuum duality of granular matter. Grain-scale kinematics, obtained by shearing a sample under triaxial compression, are coupled with a recently(More)
Imaging, epitomized by computed tomography, continues to provide unprecedented 3D access to granu-lar microstructures at ever-greater resolutions. The non-destructive technique has enabled deep insight into the morphology and behavior of granular materials, in situ and as a function of macroscopic states, e.g., loads. However, a significant bottleneck in(More)
Granular materials, in common with many complex systems, exhibit a range of self-organization processes that control their mechanical performance. Many of these processes directly manifest in the evolution of the contact network as the material responds to applied stresses and strains. Yet the connections between the topology, structure and dynamics of this(More)
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