Mechanical and Microscopic Properties of the Reversible Plastic Regime in a 2D Jammed Material

Condensed Matter journal club

Mechanical and Microscopic Properties of the Reversible Plastic Regime in a 2D Jammed Material

  • Event time: 11:30am
  • Event date: 17th October 2014
  • Speaker: Simon Weir (Formerly School of Physics & Astronomy, University of Edinburgh)
  • Location: Room 2511,

Event details

Abstract

At the microscopic level, plastic flow of a jammed, disordered material consists of a series of particle rearrangements that cannot be reversed by subsequent deformation. An infinitesimal deformation of the same material has no rearrangements. Yet between these limits, there may be a self-organized plastic regime with rearrangements, but with no net change upon reversing a deformation. We measure the oscillatory response of a jammed interfacial material, and directly observe rearrangements that couple to bulk stress and dissipate energy, but do not always give rise to global irreversibility.
PRL 112 article 028302 (2014)
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Authors

Nathan C. Keim, Paulo E. Arratia