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Band transition and topological interface modes in 1D elastic phononic crystals

In this report, we design a one-dimensional elastic phononic crystal (PC) comprised of an Aluminum beam with periodically arranged cross-sections to study the inversion of bulk bands due to the change of topological phases. As the geometric parameters of the unit cell varies, the second bulk band cl...

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Detalles Bibliográficos
Autores principales: Yin, Jianfei, Ruzzene, Massimo, Wen, Jihong, Yu, Dianlong, Cai, Li, Yue, Linfeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5931582/
https://www.ncbi.nlm.nih.gov/pubmed/29717212
http://dx.doi.org/10.1038/s41598-018-24952-5
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author Yin, Jianfei
Ruzzene, Massimo
Wen, Jihong
Yu, Dianlong
Cai, Li
Yue, Linfeng
author_facet Yin, Jianfei
Ruzzene, Massimo
Wen, Jihong
Yu, Dianlong
Cai, Li
Yue, Linfeng
author_sort Yin, Jianfei
collection PubMed
description In this report, we design a one-dimensional elastic phononic crystal (PC) comprised of an Aluminum beam with periodically arranged cross-sections to study the inversion of bulk bands due to the change of topological phases. As the geometric parameters of the unit cell varies, the second bulk band closes and reopens forming a topological transition point. This phenomenon is confirmed for both longitudinal waves and bending waves. By constructing a structural system formed by two PCs with different topological phases, for the first time, we experimentally demonstrate the existence of interface mode within the bulk band gap as a result of topological transition for both longitudinal and bending modes in elastic systems, although for bending modes, additional conditions have to be met in order to have the interface mode due to the dispersive nature of the bending waves in uniform media compared to the longitudinal waves.
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spelling pubmed-59315822018-08-29 Band transition and topological interface modes in 1D elastic phononic crystals Yin, Jianfei Ruzzene, Massimo Wen, Jihong Yu, Dianlong Cai, Li Yue, Linfeng Sci Rep Article In this report, we design a one-dimensional elastic phononic crystal (PC) comprised of an Aluminum beam with periodically arranged cross-sections to study the inversion of bulk bands due to the change of topological phases. As the geometric parameters of the unit cell varies, the second bulk band closes and reopens forming a topological transition point. This phenomenon is confirmed for both longitudinal waves and bending waves. By constructing a structural system formed by two PCs with different topological phases, for the first time, we experimentally demonstrate the existence of interface mode within the bulk band gap as a result of topological transition for both longitudinal and bending modes in elastic systems, although for bending modes, additional conditions have to be met in order to have the interface mode due to the dispersive nature of the bending waves in uniform media compared to the longitudinal waves. Nature Publishing Group UK 2018-05-01 /pmc/articles/PMC5931582/ /pubmed/29717212 http://dx.doi.org/10.1038/s41598-018-24952-5 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Yin, Jianfei
Ruzzene, Massimo
Wen, Jihong
Yu, Dianlong
Cai, Li
Yue, Linfeng
Band transition and topological interface modes in 1D elastic phononic crystals
title Band transition and topological interface modes in 1D elastic phononic crystals
title_full Band transition and topological interface modes in 1D elastic phononic crystals
title_fullStr Band transition and topological interface modes in 1D elastic phononic crystals
title_full_unstemmed Band transition and topological interface modes in 1D elastic phononic crystals
title_short Band transition and topological interface modes in 1D elastic phononic crystals
title_sort band transition and topological interface modes in 1d elastic phononic crystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5931582/
https://www.ncbi.nlm.nih.gov/pubmed/29717212
http://dx.doi.org/10.1038/s41598-018-24952-5
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