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Microdisplacements induced by a local perturbation inside a granular packing

Abstract : The microdisplacements generated by a small localized overload at the free surface are visualized experimentally inside a packing of steel beads. For a triangular packing, beads rearrangements remain confined in two inverted triangles on both sides of the applied overload. This pattern disappears for stronger disorder. A simple model allows us to account for these observations and to relate them to the stress function response measured via photoelastic visualizations. This provides a different tool to probe the mechanical Green's function in weakly confined packings of rigid grains the description of which is the most challenged.
Keywords : 4570Cc 8105Rm 4570Qj
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https://hal-cea.archives-ouvertes.fr/cea-01373750
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Submitted on : Thursday, September 29, 2016 - 11:00:53 AM
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Daniel Bonamy, Samuel Bernard-Bernardet, François Daviaud, Louis Laurent. Microdisplacements induced by a local perturbation inside a granular packing. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, American Physical Society, 2003, 68 (4), pp.042301. ⟨10.1103/PhysRevE.68.042301⟩. ⟨cea-01373750⟩

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