Force Distributions near Jamming and Glass Transitions |
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Authors: | O'Hern Langer Liu Nagel |
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Institution: | Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095-1569 and James Franck Institute, The University of Chicago, Chicago, Illinois 60637. |
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Abstract: | We calculate the distribution of interparticle normal forces P(F) near the glass and jamming transitions in model supercooled liquids and foams, respectively. P(F) develops a peak that appears near the glass or jamming transitions, whose height increases with decreasing temperature, decreasing shear stress and increasing packing density. A similar shape of P(F) was observed in experiments on static granular packings. We propose that the appearance of this peak signals the development of a yield stress. The sensitivity of the peak to temperature, shear stress, and density lends credence to the recently proposed generalized jamming phase diagram. |
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