Jamming and irreversibility

Julia Boschan, Stefan Luding, Brian P. Tighe*

*Corresponding author for this work

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    Abstract

    We investigate irreversibility in soft frictionless disk packings on approach to the unjamming transition. Using simulations of shear reversal tests, we study the relationship between plastic work and irreversible rearrangements of the contact network. Infinitesimal strains are reversible, while any finite strain generates plastic work and contact changes in a sufficiently large packing. The number of irreversible contact changes grows with strain, and the stress–strain curve displays a crossover from linear to increasingly nonlinear response when the fraction of irreversible contact changes approaches unity.

    Original languageEnglish
    Article number58
    JournalGranular matter
    Volume21
    Issue number3
    Early online date21 Jun 2019
    DOIs
    Publication statusPublished - 1 Aug 2019

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    Keywords

    • UT-Hybrid-D
    • Jamming
    • Plasticity
    • Irreversibility

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