Jamming and irreversibility

Julia Boschan, Stefan Luding, Brian P. Tighe*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)
119 Downloads (Pure)


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
Number of pages7
JournalGranular Matter
Issue number3
Publication statusPublished - 2019


  • Irreversibility
  • Jamming
  • Plasticity


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