Flexible wavefront modulation of Rayleigh surface waves by mechanically reconfigurable elastic metasurface

Chen, A-Li; Zhang, Hua-Wei; Wang, Yue-Sheng

doi:10.1016/j.eml.2023.102088

Cited by 2 publications

(2 citation statements)

References 55 publications

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“…The GSL consists of introducing a phase gradient at the interface of two media to shape non-standard reflection and/or refraction waves. In elastodynamics, the phase shift is related to the variation of phase velocities, which can be achieved by adjusting the dynamic behaviour of locally resonant units [173][174][175][176]. In principle, covering the whole phase range may allow metamaterials to arbitrarily guide elastic waves [177,178] and, exploiting this mechanism, numerous metasurfaces were designed to guide flexural or in-plane waves in thin plates [179][180][181][182][183], as well as surface waves along the edge of half-spaces [184].…”

Section: Engineering Applicationsmentioning

confidence: 99%

Current developments in elastic and acoustic metamaterials science

Failla,

Marzani,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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The concept of metamaterial recently emerged as a new frontier of scientific research, encompassing physics, materials science and engineering. In a broad sense, a metamaterial indicates an engineered material with exotic properties not found in nature, obtained by appropriate architecture either at macro-scale or at micro-/nano-scales. The architecture of metamaterials can be tailored to open unforeseen opportunities for mechanical and acoustic applications, as demonstrated by an impressive and increasing number of studies. Building on this knowledge, this theme issue aims to gather cutting-edge theoretical, computational and experimental studies on elastic and acoustic metamaterials, with the purpose of offering a wide perspective on recent achievements and future challenges. This article is part of the theme issue ‘Current developments in elastic and acoustic metamaterials science (Part 1)’.

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Section: Engineering Applicationsmentioning

confidence: 99%

Current developments in elastic and acoustic metamaterials science

Failla,

Marzani,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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show abstract

“…The GSL aims at introducing a phase gradient at the interface of two media to shape nonstandard reflection and/or refraction waves. Typically, the phase shift is related to the variation of phase velocities, which can be achieved by adjusting the dynamic behaviour of locally resonant units [25][26][27][28]. In principle, by customizing schemes that cover the 0 − 2π phase range, metamaterials allow us to arbitrarily guide elastic waves [29,30].…”

Section: Introductionmentioning

confidence: 99%

Guiding near-source elastic waves in a semi-infinite medium

Cui,

Xu,

Palermo

et al. 2024

Phil. Trans. R. Soc. A.

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In this work, we propose elastic metamaterials with phase discontinuities to steer the propagation of near-source bulk waves in a semi-infinite elastic medium. Our design exploits an array of embedded subwavelength resonators with tailored masses to attain a complete phase shift spanning 0 − 2 π . This phase control allows for diverse wave functionalities, such as directional refraction and energy focusing. Through the use of dispersion diagrams and the generalized Snell’s law, along with a multiple scattering formulation, we analytically demonstrate the effectiveness of our design in achieving the desired wavefront manipulation. The proposed design has the potential to advance the field of guiding elastic waves using metamaterials and find practical applications in areas such as isolating ground-borne vibrations in densely urbanized regions and energy harvesting. This article is part of the theme issue ‘Current developments in elastic and acoustic metamaterials science (Part 1)’.

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Flexible wavefront modulation of Rayleigh surface waves by mechanically reconfigurable elastic metasurface

Cited by 2 publications

References 55 publications

Current developments in elastic and acoustic metamaterials science

Current developments in elastic and acoustic metamaterials science

Guiding near-source elastic waves in a semi-infinite medium

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