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    Enhancement of Deep-Subwavelength Band Gaps in Flat Spiral-Based Phononic Metamaterials Using the Trampoline Phenomena

    Source: Journal of Applied Mechanics:;2020:;volume( 087 ):;issue: 007
    Author:
    Bilal, Osama R.
    ,
    Foehr, André
    ,
    Daraio, Chiara
    DOI: 10.1115/1.4046893
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Elastic and acoustic metamaterials can sculpt dispersion of waves through resonances. In turn, resonances can give rise to negative effective properties, usually localized around the resonance frequencies, which support band gaps at subwavelength frequencies (i.e., below the Bragg-scattering limit). However, the band gaps width correlates strongly with the resonators’ mass and volume, which limits their functionality in applications. Trampoline phenomena have been numerically and experimentally shown to broaden the operational frequency ranges of two-dimensional, pillar-based metamaterials through perforation. In this work, we demonstrate trampoline phenomena in lightweight and planar lattices consisting of arrays of Archimedean spirals in unit cells. Spiral-based metamaterials have been shown to support different band gap opening mechanisms, namely, Bragg-scattering, local resonances and inertia amplification. Here, we numerically analyze and experimentally realize trampoline phenomena in planar metasurfaces for different lattice tessellations. Finally, we carry out a comparative study between trampoline pillars and spirals and show that trampoline spirals outperform the pillars in lightweight, compactness and operational bandwidth.
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      Enhancement of Deep-Subwavelength Band Gaps in Flat Spiral-Based Phononic Metamaterials Using the Trampoline Phenomena

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4273332
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    contributor authorBilal, Osama R.
    contributor authorFoehr, André
    contributor authorDaraio, Chiara
    date accessioned2022-02-04T14:16:42Z
    date available2022-02-04T14:16:42Z
    date copyright2020/05/14/
    date issued2020
    identifier issn0021-8936
    identifier otherjam_87_7_071009.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4273332
    description abstractElastic and acoustic metamaterials can sculpt dispersion of waves through resonances. In turn, resonances can give rise to negative effective properties, usually localized around the resonance frequencies, which support band gaps at subwavelength frequencies (i.e., below the Bragg-scattering limit). However, the band gaps width correlates strongly with the resonators’ mass and volume, which limits their functionality in applications. Trampoline phenomena have been numerically and experimentally shown to broaden the operational frequency ranges of two-dimensional, pillar-based metamaterials through perforation. In this work, we demonstrate trampoline phenomena in lightweight and planar lattices consisting of arrays of Archimedean spirals in unit cells. Spiral-based metamaterials have been shown to support different band gap opening mechanisms, namely, Bragg-scattering, local resonances and inertia amplification. Here, we numerically analyze and experimentally realize trampoline phenomena in planar metasurfaces for different lattice tessellations. Finally, we carry out a comparative study between trampoline pillars and spirals and show that trampoline spirals outperform the pillars in lightweight, compactness and operational bandwidth.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleEnhancement of Deep-Subwavelength Band Gaps in Flat Spiral-Based Phononic Metamaterials Using the Trampoline Phenomena
    typeJournal Paper
    journal volume87
    journal issue7
    journal titleJournal of Applied Mechanics
    identifier doi10.1115/1.4046893
    page71009
    treeJournal of Applied Mechanics:;2020:;volume( 087 ):;issue: 007
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian