Reconfigurable flexural waves manipulation by broadband elastic metasurface

Yuan, Si-Min; Chen, A‐Li; Du, Xingyue; Zhang, Huawei; Assouar, Badreddine; Wang, Yue-Sheng

doi:10.1016/j.ymssp.2022.109371

Cited by 21 publications

(13 citation statements)

References 46 publications

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“…Tunable metamaterials may be classified into two types, reconfigurable and active. Reconfigurable (or switchable) elastic metamaterials have mechanically reconfigurable structures to achieve tunability [359][360][361][362][363][364][365][366][367][368]. For example, Yuan et al [361] proposed reconfigurable elastic metamaterials composed of screw bolts and nuts, as shown in figure 20(a).…”

Section: Enhancing Practical Applications Of Elastic Metamaterialsmentioning

confidence: 99%

Elastic metamaterials for guided waves: from fundamentals to applications

Lee,

Kim

2023

Smart Mater. Struct.

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Guided waves, elastic waves propagating through bounded structures, play a pivotal role in various applications, including ultrasonic non-destructive testing and structural health monitoring. Recently, elastic metamaterials artificially engineered to exhibit physical properties not typically seen in nature have emerged as a ground-breaking approach, heralding a new era in guided wave-based technologies. These metamaterials offer innovative solutions to overcome the inherent constraints of traditional guided wave-based technology. This paper comprehensively reviews elastic metamaterials from their fundamental principles to diverse applications, focusing on their transformative impact in guided wave manipulation.

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Section: Enhancing Practical Applications Of Elastic Metamaterialsmentioning

confidence: 99%

Elastic metamaterials for guided waves: from fundamentals to applications

Lee,

Kim

2023

Smart Mater. Struct.

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“…[24] Furthermore, a reconfigurable fishbone elastic metasurface that enables continuous tuning by screwing in or out to achieve switchable multifunctional elastic wave manipulation was proposed. [25][26][27] However, the most intriguing reconfigurable elastic metasurfaces introduced earlier have significant limitations. First, an analytical approach is necessary for a comprehensive physical understanding and predicting the propagating behaviors of elastic waves.…”

Section: Introductionmentioning

confidence: 99%

“…Still, most prior studies have predominantly relied on numerical analysis. [17,18,[23][24][25][26][27][28] This is because the proposed geometries for the phase modulation of elastic waves are highly complex and challenging to model mathematically. Second, because of the complexity of such systems, experimental validations have been challenging, leading to a substantial number of studies reporting without experimental validations.…”

Section: Introductionmentioning

confidence: 99%

Timoshenko–Ehrenfest Beam‐Based Reconfigurable Elastic Metasurfaces for Multifunctional Wave Manipulation

Lee,

Choi,

et al. 2024

Advanced Science

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Herein, a Timoshenko–Ehrenfest beam‐based reconfigurable elastic metasurface is introduced that can perform multifunctional wave phenomena within a single substrate, featuring high transmission in the ultrabroadband frequency range. Conventional elastic metasurfaces are typically limited to specific purposes and frequencies, thereby imposing significant constraints on their practical application. The approach involves assembly‐components with various geometries on a substrate for reconfigurability, enabling to easily control and implement multifunctional wave phenomena, including anomalous‐refraction, focusing, self‐acceleration, and total‐reflection. This is the first study on elastic metasurfaces to theoretically analyze the dispersion relation based on the Timoshenko–Ehrenfest beam theory, which considers shear deformations and rotational inertia. The analytical model is validated by demonstrating an excellent agreement with numerical and experimental results. The findings include full‐wave harmonic simulations and experimentally visualized fields for measuring various wave modulations. Furthermore, the practicality of the system is verified by significantly enhancing the piezoelectric energy harvesting performance within the focusing configuration. It is believed that the reconfigurable elastic metasurface and analytical model based on the Timoshenko–Ehrenfest beam theory have vast applications such as structural health monitoring, wireless sensing, and Internet of Things.

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“…These deficiencies cannot fulfill the application requirements for flexible and complex acoustic field manipulations within a broad frequency band. In recent years, great effort has been made in regard to the reconfigurable acoustic metamaterials of different forms, [25][26][27][28][29][30][31][32][33][34][35][36] which provides inspiring ideas to solve the limitation of unchangeable structures. There are also few studies focusing on broadband sound manipulations.…”

Section: Introductionmentioning

confidence: 99%

Ultrabroadband and Reconfigurable Transmissive Acoustic Metascreen

Fan

Zhu

et al. 2023

Adv Funct Materials

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Passive acoustic wave manipulations are severely constrained by the narrow frequency bandwidth of acoustic metastructures. In this research, an unprecedented type of reconfigurable acoustic metascreen is proposed for broadband manipulations of transmitted acoustic waves. The conceived structure is composed of uniquely designed unit cells producing the modulation of the transmitted phase shift within the full 2π range with an excellent impedance matching with the background medium. By rationally arranging the reconfigurable elements within the metascreen based on the corresponding parameter profile, different phenomena and functionalities can be easily realized. As examples, acoustic focusing and acoustic bending are presented to showcase the performance of the proposed metascreen. We indeed numerically and experimentally demonstrate the ultra‐broadband and reconfigurable features of our concept over an astonishing frequency range extending from 3 to 17 kHz, which covers the majority spectrum of the audible range of human hearing. Our work provides a unique and remarkable conceptual design of acoustic metascreen opening a promising and pragmatic route to conceive compact broadband acoustic devices, where wavefront manipulations on broadband sound signals or pulsed signals are required.

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Reconfigurable flexural waves manipulation by broadband elastic metasurface

Cited by 21 publications

References 46 publications

Elastic metamaterials for guided waves: from fundamentals to applications

Elastic metamaterials for guided waves: from fundamentals to applications

Timoshenko–Ehrenfest Beam‐Based Reconfigurable Elastic Metasurfaces for Multifunctional Wave Manipulation

Ultrabroadband and Reconfigurable Transmissive Acoustic Metascreen

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