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Programmable and robust static topological solitons in mechanical metamaterials.

Abstract：

:Solitary, persistent wave packets called solitons hold potential to transfer information and energy across a wide range of spatial and temporal scales in physical, chemical, and biological systems. Mechanical solitons characteristically emerge either as a single wave packet or uncorrelated propagating topological entities through space and/or time, but these are notoriously difficult to control. Here, we report a theoretical framework for programming static periodic topological solitons into a metamaterial, and demonstrate its implementation in real metamaterials computationally and experimentally. The solitons are excited by deformation localizations under quasi-static compression, and arise from buckling-induced kink-antikink bands that provide domain separation barriers. The soliton number and wavelength demonstrate a previously unreported size-dependence, due to intrinsic length scales. We identify that these unanticipated solitons stem from displacive phase transitions with periodic topological excitations captured by the well-known [Formula: see text] theory. Results reveal pathways for robust regularizations of stochastic responses of metamaterials.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zhang Y,Li B,Zheng QS,Genin GM,Chen CQ

doi

10.1038/s41467-019-13546-y

subject

Has Abstract

pub_date

2019-12-06 00:00:00

pages

5605

issue

1

issn

2041-1723

pii

10.1038/s41467-019-13546-y

journal_volume

10

pub_type

杂志文章

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