Granular dynamics in compaction and stress relaxation

Jasna Brujić, Ping Wang, Chaoming Song, David L. Johnson, Olivier Sindt, Hernán A. Makse

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Elastic and dissipative properties of granular assemblies under uniaxial compression are studied both experimentally and by numerical simulations. Following a novel compaction procedure at varying oscillatory pressures, the stress response to a step strain reveals an exponential relaxation followed by a slow logarithmic decay. Simulations indicate that the latter arises from the coupling between damping and collective grain motion predominantly through sliding. We characterize an analogous "glass transition" for packed grains, below which the system shows aging in time-dependent sliding correlation functions.

    Original languageEnglish (US)
    Article number128001
    JournalPhysical Review Letters
    Volume95
    Issue number12
    DOIs
    StatePublished - Sep 16 2005

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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