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Atomimetic Mechanical Structures with Nonlinear Topological Domain Evolution Kinetics

Frazier, Michael J. and Kochmann, Dennis M. (2017) Atomimetic Mechanical Structures with Nonlinear Topological Domain Evolution Kinetics. Advanced Materials, 29 (19). Art. No. 1605800 . ISSN 0935-9648. doi:10.1002/adma.201605800.

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A mechanical metamaterial, a simple, periodic mechanical structure, is reported, which reproduces the nonlinear dynamic behavior of materials undergoing phase transitions and domain switching at the structural level. Tunable multistability is exploited to produce switching and transition phenomena whose kinetics are governed by the same Allen–Cahn law commonly used to describe material-level, structural-transition processes. The reported purely elastic mechanical system displays several key features commonly found in atomic- or mesoscale physics of solids. The rotating-mass network shows qualitatively analogous features as, e.g., ferroic ceramics or phase-transforming solids, and the discrete governing equation is shown to approach the phase field equation commonly used to simulate the above processes. This offers untapped opportunities for reproducing material-level, dissipative and diffusive kinetic phenomena at the structural level, which, in turn, invites experimental realization and paves the road for new active, intelligent, or phase-transforming mechanical metamaterials bringing small-scale processes to the macroscopically observable scale.

Item Type:Article
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Kochmann, Dennis M.0000-0002-9112-6615
Additional Information:© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Received: October 27, 2016; Revised: February 7, 2017; First published: 21 March 2017. The authors acknowledge the support from the National Science Foundation (NSF) through CAREER Award CMMI-1254424.
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Subject Keywords:ferroelectrics; metamaterials; nonlinear waves; phase field; phase transitions
Issue or Number:19
Record Number:CaltechAUTHORS:20170324-095257081
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Official Citation:M. J. Frazier, D. M. Kochmann, Adv. Mater. 2017, 29, 1605800
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75384
Deposited By: Tony Diaz
Deposited On:24 Mar 2017 17:31
Last Modified:15 Nov 2021 16:33

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