Behavior of Granular Assemblies at High Velocity in a Large Open Shear Box

    Volume 28, Issue 5 (September 2005)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 13 July 2005

    Page Count: 10


    Wong, RCK
    Professor, University of Calgary, Calgary, Alberta

    (Received 24 February 2004; accepted 18 February 2005)

    Abstract

    Large open shear box tests on granular materials have been conducted to investigate the behavior of these materials at high velocity. Several modes of kinetic motion were identified from the tests: steady sliding, sliding with rolling, impulsive rolling, and steady rolling. The measured resistances in these tests of different modes were observed to be dependent on material friction, base friction, velocity, body shape, and mobilized volume. However, spectral analysis of the measured data in time series shows that there exist no periodicities in the spectra, i.e., frequency- or velocity-independent. Of practical implication for this study is that the measured resistance for constant velocity motion decreases with increasing rolling motion activity within the moving granular mass. The average coefficient of resistance or friction could be less than the coefficient of kinetic friction measured in Coulomb-type shear tests.


    Paper ID: GTJ12584

    DOI: 10.1520/GTJ12584

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    Title Behavior of Granular Assemblies at High Velocity in a Large Open Shear Box
    Symposium , 0000-00-00
    Committee D18