Journal article

Mesoscale and macroscale kinetic energy fluxes from granular fabric evolution

David M Walker, Antoinette Tordesillas, Gary Froyland



Recent advances in high-resolution measurements means it is now possible to identify and track the local "fabric" or contact topology of individual grains in a deforming sand throughout loading history. These provide compelling impetus to the development of methods for inferring changes in the contact forces and energies at multiple spatiotemporal scales, using information on grain contacts alone. Here we develop a surrogate measure of the fluctuating kinetic energy based on changes in the local contact topology of individual grains. We demonstrate the method for dense granular materials under quasistatic biaxial shear. In these systems, the initially stable and solidlike response eventually..

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Awarded by US Army Research Office

Awarded by Australian Research Council Discovery Projects

Awarded by ARC Future Fellowship

Funding Acknowledgements

We thank our anonymous reviewers for their useful suggestions, which have improved this paper. This work was supported by the US Army Research Office (Grant No. W911NF-11-1-0175), the Australian Research Council Discovery Projects 2012 (Grant No. DP120104759), and the Melbourne Energy Institute. G.F. was supported by an ARC Future Fellowship (FT120100025).