Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session F19: Glasses, Nanocomposites, and Dynamics
8:00 AM–11:00 AM,
Tuesday, March 15, 2022
Room: McCormick Place W-185A
Sponsoring Unit: DPOLY
Chair: Issei Nakamura, Michigan Technological University
Abstract: F19.00008 : Jamming on Deformable Surfaces*
9:48 AM–10:00 AM
Recently, a number of experiments have been conducted that involve solidification of particulate media driven by a deformable or moving interface involving Pickering emulsions, bacterial systems, bijels etc. These situations do not neatly fit into the scenarios envisioned in prior theoretical work, because these only consider particle-particle interactions and take place in Euclidean space subject to deformable boundaries. Here, the rigidification takes place not only with respect to particle degrees of freedom, but also with respect to the shape of the interface itself. Further, the non-Euclidean geometry of the interface means that particles in different locations may experience location dependent states of stress depending on the local shape of the interface.
Here, we propose a new jamming category, which we refer to as metric jamming, that refers to structures jammed both with respect to particle degrees of freedom and surface degrees of freedom. Examples of metric jammed structures are produced through computer simulation. By adjusting the relative influence of surface and particle energies characterized by a single dimensionless parameter metric jammed structures can continuously be tuned from isostatic with vanishing shear modulus, i.e. similar to jammed states in flat space, to states that resemble conventional elastic solids. Other properties of these new structures will be discussed.
*This material is based upon work supported by the National Science Foundation under grant DMR-1654283.
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