Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber
While the design of always new metamaterials with exotic static and dynamic properties is attracting deep attention in the last decades, little effort is made to explore their interactions with other materials. This prevents the conception of (meta-)structures that can enhance metamaterials’ unusual...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-03-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2020.589701/full |
| _version_ | 1818848306498895872 |
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| author | Gianluca Rizzi Manuel Collet Félix Demore Bernhard Eidel Patrizio Neff Angela Madeo |
| author_facet | Gianluca Rizzi Manuel Collet Félix Demore Bernhard Eidel Patrizio Neff Angela Madeo |
| author_sort | Gianluca Rizzi |
| collection | DOAJ |
| description | While the design of always new metamaterials with exotic static and dynamic properties is attracting deep attention in the last decades, little effort is made to explore their interactions with other materials. This prevents the conception of (meta-)structures that can enhance metamaterials’ unusual behaviors and that can be employed in real engineering applications. In this paper, we give a first answer to this challenging problem by showing that the relaxed micromorphic model with zero static characteristic length can be usefully applied to describe the refractive properties of simple meta-structures for extended frequency ranges and for any direction of propagation of the incident wave. Thanks to the simplified model’s structure, we are able to efficiently explore different configurations and to show that a given meta-structure can drastically change its overall refractive behavior when varying the elastic properties of specific meta-structural elements. In some cases, changing the stiffness of a homogeneous material which is in contact with a metamaterial’s slab, reverses the structure’s refractive behavior by switching it from an acoustic screen (total reflection) into an acoustic absorber (total transmission). The present paper clearly indicates that, while the study and enhancement of the intrinsic metamaterials’ properties is certainly of great importance, it is even more challenging to enable the conception of meta-structures that can eventually boost the use of metamaterials in real-case applications. |
| first_indexed | 2024-12-19T06:15:15Z |
| format | Article |
| id | doaj.art-cc46a6cac9534ea2a12fb993af78c8d3 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-19T06:15:15Z |
| publishDate | 2021-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-cc46a6cac9534ea2a12fb993af78c8d32022-12-21T20:32:53ZengFrontiers Media S.A.Frontiers in Materials2296-80162021-03-01710.3389/fmats.2020.589701589701Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic AbsorberGianluca Rizzi0Manuel Collet1Félix Demore2Bernhard Eidel3Patrizio Neff4Angela Madeo5GEOMAS, INSA-Lyon, Université de Lyon, Villeurbanne Cedex, FranceÉcole Centrale de Lyon, Écully, FranceÉcole Centrale de Lyon, Écully, FranceHeisenberg-Group, Institute of Mechanics, Department Mechanical Engineering, University Siegen, Siegen, GermanyHead of Chair for Nonlinear Analysis and Modelling, Fakultät für Mathematik, Universität Duisburg-Essen, Essen, GermanyGEOMAS, INSA-Lyon, Université de Lyon, Villeurbanne Cedex, FranceWhile the design of always new metamaterials with exotic static and dynamic properties is attracting deep attention in the last decades, little effort is made to explore their interactions with other materials. This prevents the conception of (meta-)structures that can enhance metamaterials’ unusual behaviors and that can be employed in real engineering applications. In this paper, we give a first answer to this challenging problem by showing that the relaxed micromorphic model with zero static characteristic length can be usefully applied to describe the refractive properties of simple meta-structures for extended frequency ranges and for any direction of propagation of the incident wave. Thanks to the simplified model’s structure, we are able to efficiently explore different configurations and to show that a given meta-structure can drastically change its overall refractive behavior when varying the elastic properties of specific meta-structural elements. In some cases, changing the stiffness of a homogeneous material which is in contact with a metamaterial’s slab, reverses the structure’s refractive behavior by switching it from an acoustic screen (total reflection) into an acoustic absorber (total transmission). The present paper clearly indicates that, while the study and enhancement of the intrinsic metamaterials’ properties is certainly of great importance, it is even more challenging to enable the conception of meta-structures that can eventually boost the use of metamaterials in real-case applications.https://www.frontiersin.org/articles/10.3389/fmats.2020.589701/fullmechanical metamaterialswave-propagationmeta-materialsmeta-structurerelaxed micromorphic model |
| spellingShingle | Gianluca Rizzi Manuel Collet Félix Demore Bernhard Eidel Patrizio Neff Angela Madeo Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber Frontiers in Materials mechanical metamaterials wave-propagation meta-materials meta-structure relaxed micromorphic model |
| title | Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber |
| title_full | Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber |
| title_fullStr | Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber |
| title_full_unstemmed | Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber |
| title_short | Exploring Metamaterials’ Structures Through the Relaxed Micromorphic Model: Switching an Acoustic Screen Into an Acoustic Absorber |
| title_sort | exploring metamaterials structures through the relaxed micromorphic model switching an acoustic screen into an acoustic absorber |
| topic | mechanical metamaterials wave-propagation meta-materials meta-structure relaxed micromorphic model |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2020.589701/full |
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