Phys. Rev. Lett. 91, 064301 (2003) [4 pages]Internal Granular Dynamics, Shear-Induced Crystallization, and Compaction StepsReceived 11 March 2003; published 6 August 2003 Internal imaging using index matching, and sensitive volume measurement, are used to investigate the spatial order and dynamics of a deep disordered layer of spheres sheared under a fixed load. Shearing triggers a crystallization transition accompanied by a step compaction event. The delay preceding the transition depends strongly on the layer thickness and can require a translation of about 105 particle diameters. The mean velocity varies with depth by more than five decades, and its profile is qualitatively altered by the transition. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.064301
DOI:
10.1103/PhysRevLett.91.064301
PACS:
45.70.Cc, 83.50.Ax, 83.80.Hj, 64.60.Cn
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