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)
pdf version

Authors

Nathan C. Keim, Paulo E. Arratia

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