Reversibility of granular rotations and translations

Abstract

We analyze reversibility of both displacements and rotations of spherical grains in three-dimensional compression experiments. Using transparent acrylic beads with cylindrical holes and index matching techniques, we are not only capable of tracking displacements but also, for the first time, analyze reversibility of rotations. We observe that for moderate compression amplitudes, up to one bead diameter, the translational displacements of the beads after each cycle become mostly reversible after an initial transient. By contrast, granular rotations are largely irreversible. We find a weak correlation between translational and rotational displacements, indicating that rotational reversibility depends on more subtle changes in contact distributions and contact forces between grains compared with displacement reversibility.

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Cited by in corpus (6)

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• Experimentally measuring rolling and sliding in three-dimensional dense granular packings
• Sheared Amorphous Packings Display Two Separate Particle Transport Mechanisms
• Memory in 3D cyclically driven granular material
• Spatially correlated rotational dynamics reveals strain dependence in amorphous particle packings
• Effects of interparticle friction on the response of 3D cyclically compressed granular material