Shearing and order in vibrationally fluidized 3D granular flows

Karen Daniels

From earthquakes faults to the nanoscale deformation of everyday materials, many solids exhibit a localization of shear when subjected to external stresses. In contrast, fluid systems do not, instead showing linear velocity profiles. The investigation of shear profiles in granular systems is particularly interesting since these materials have some characteristics of each. I will present initial results from a 3D annular shearing experiment which can be vibrationally excited from below. This provides two separate means of injecting energy into the system, and we are able to study the interaction of the two effects in the formation of shear bands.

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