Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session F07: Non-reciprocity in Soft and Active Matter II
8:00 AM–11:00 AM,
Tuesday, March 7, 2023
Room: Room 130
Sponsoring
Units:
DSOFT GSNP
Chair: Anton Souslov, University of Bath; Daniel Sussman, Emory University
Abstract: F07.00006 : Coarsening in odd elastic metamaterials
9:00 AM–9:12 AM
Presenter:
Jack Binysh
(University of Bath)
Authors:
Jack Binysh
(University of Bath)
Jonas Veenstra
(University of Amsterdam)
Guido C Baardink
(Univ of Bath)
Anton Souslov
(University of Bath)
Corentin Coulais
(University of Amsterdam)
Here, we develop a continuum model of nonlinear odd elasticity, benchmarked against microscopic simulation and table-top experiments.We show that the combination of non-reciprocity and non-linearity in momentum-conserving materials yields long-wavelength instabilities and travelling nonlinear patterns. Strikingly, momentum conservation causes these emergent patterns to coarsen over time. As a result, this active metamaterial spontaneously rids itself of disorder in favour of coherent motion. We explore how this coarsening can respond to environmental stimuli, leading to a toolkit of distinct patterns for designing locomotion and actuation.
Our results position odd elastic solids as an illustrative example of nonlinear physics in the absence of reciprocity, and point towards applications of these animate materials towards shape change, crawling, and swimming
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