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The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix

The extreme and unconventional properties of mechanical metamaterials originate in their sophisticated internal architectures. Traditionally, the architecture of mechanical metamaterials is decided on in the design stage and cannot be altered after fabrication. However, the phenomenon of elastic ins...

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Autores principales: Galich, Pavel I., Sharipova, Aliya, Slesarenko, Slava
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073188/
https://www.ncbi.nlm.nih.gov/pubmed/33919612
http://dx.doi.org/10.3390/ma14082038
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author Galich, Pavel I.
Sharipova, Aliya
Slesarenko, Slava
author_facet Galich, Pavel I.
Sharipova, Aliya
Slesarenko, Slava
author_sort Galich, Pavel I.
collection PubMed
description The extreme and unconventional properties of mechanical metamaterials originate in their sophisticated internal architectures. Traditionally, the architecture of mechanical metamaterials is decided on in the design stage and cannot be altered after fabrication. However, the phenomenon of elastic instability, usually accompanied by a reconfiguration in periodic lattices, can be harnessed to alter their mechanical properties. Here, we study the behavior of mechanical metamaterials consisting of hexagonal networks embedded into a soft matrix. Using finite element analysis, we reveal that under specific conditions, such metamaterials can undergo sequential buckling at two different strain levels. While the first reconfiguration keeps the periodicity of the metamaterial intact, the secondary buckling is accompanied by the change in the global periodicity and formation of a new periodic unit cell. We reveal that the critical strains for the first and the second buckling depend on the metamaterial geometry and the ratio between elastic moduli. Moreover, we demonstrate that the buckling behavior can be further controlled by the placement of the rigid circular inclusions in the rotation centers of order 6. The observed sequential buckling in bulk metamaterials can provide additional routes to program their mechanical behavior and control the propagation of elastic waves.
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spelling pubmed-80731882021-04-27 The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix Galich, Pavel I. Sharipova, Aliya Slesarenko, Slava Materials (Basel) Article The extreme and unconventional properties of mechanical metamaterials originate in their sophisticated internal architectures. Traditionally, the architecture of mechanical metamaterials is decided on in the design stage and cannot be altered after fabrication. However, the phenomenon of elastic instability, usually accompanied by a reconfiguration in periodic lattices, can be harnessed to alter their mechanical properties. Here, we study the behavior of mechanical metamaterials consisting of hexagonal networks embedded into a soft matrix. Using finite element analysis, we reveal that under specific conditions, such metamaterials can undergo sequential buckling at two different strain levels. While the first reconfiguration keeps the periodicity of the metamaterial intact, the secondary buckling is accompanied by the change in the global periodicity and formation of a new periodic unit cell. We reveal that the critical strains for the first and the second buckling depend on the metamaterial geometry and the ratio between elastic moduli. Moreover, we demonstrate that the buckling behavior can be further controlled by the placement of the rigid circular inclusions in the rotation centers of order 6. The observed sequential buckling in bulk metamaterials can provide additional routes to program their mechanical behavior and control the propagation of elastic waves. MDPI 2021-04-18 /pmc/articles/PMC8073188/ /pubmed/33919612 http://dx.doi.org/10.3390/ma14082038 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Galich, Pavel I.
Sharipova, Aliya
Slesarenko, Slava
The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
title The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
title_full The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
title_fullStr The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
title_full_unstemmed The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
title_short The Emergence of Sequential Buckling in Reconfigurable Hexagonal Networks Embedded into Soft Matrix
title_sort emergence of sequential buckling in reconfigurable hexagonal networks embedded into soft matrix
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8073188/
https://www.ncbi.nlm.nih.gov/pubmed/33919612
http://dx.doi.org/10.3390/ma14082038
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