Design of tunable acoustic metamaterials through periodic arrays of resonant shunted piezos

Airoldi, L.; Ruzzene, Massimo

doi:10.1088/1367-2630/13/11/113010

Cited by 242 publications

(187 citation statements)

References 29 publications

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“…In recent years, rationally designed periodic structures have received increasing interest also because of their ability to manipulate and control the propagation of mechanical waves [202], opening avenues for a broad range of applications such as wave guiding [203,204], cloaking [205], noise reduction [206][207][208], and vibration control [209,210]. An important characteristic of these structured systems is their ability to tailor the propagation of waves due to the existence of band gaps-frequency ranges of strong wave attenuation-which can be generated either by Bragg scattering [211] or localized resonance within the medium [108].…”

Section: Tunable Acoustic Metamaterialsmentioning

confidence: 99%

Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

Kochmann

Bertoldi

2017

Applied Mechanics Reviews

181

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Instabilities in solids and structures are ubiquitous across all length and time scales, and engineering design principles have commonly aimed at preventing instability. However, over the past two decades, engineering mechanics has undergone a paradigm shift, away from avoiding instability and toward taking advantage thereof. At the core of all instabilities-both at the microstructural scale in materials and at the macroscopic, structural level-lies a nonconvex potential energy landscape which is responsible, e.g., for phase transitions and domain switching, localization, pattern formation, or structural buckling and snapping. Deliberately driving a system close to, into, and beyond the unstable regime has been exploited to create new materials systems with superior, interesting, or extreme physical properties. Here, we review the state-of-the-art in utilizing mechanical instabilities in solids and structures at the microstructural level in order to control macroscopic (meta)material performance. After a brief theoretical review, we discuss examples of utilizing material instabilities (from phase transitions and ferroelectric switching to extreme composites) as well as examples of exploiting structural instabilities in acoustic and mechanical metamaterials.

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Section: Tunable Acoustic Metamaterialsmentioning

confidence: 99%

Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

Kochmann

Bertoldi

2017

Applied Mechanics Reviews

181

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“…A classical solution presented in most papers focusing on piezoelectric shunts is to add resistors in series with the inductors [1,4,6,7,8,10,28]. Another less common solution consist in connecting resistors in parallel with the inductors [17,18,19,20].…”

Section: Multimodal Dampingmentioning

confidence: 99%

“…Considering onedimensional media, longitudinal wave propagation was firstly analyzed [6,7] and the strategy was then applied to bending waves control [8,9,10]. The classical passive resonant shunts can even be replaced by more broadband active solutions, as amplified resonant shunts [11] or negative capacitance shunts [12,13].…”

Section: Introductionmentioning

confidence: 99%

Multimodal vibration damping of a beam with a periodic array of piezoelectric patches connected to a passive electrical network

Lossouarn

Deü

Aucejo

2015

Smart Mater. Struct.

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Abstract. A multimodal damping strategy is implemented by coupling a beam to its analogue electrical network. This network comes from the direct electromechanical analogy applied to a transverse lattice of point masses that represents the discrete model of a beam. The mechanical and electrical structures are connected together through an array of piezoelectric patches. A discrete and a semi-continuous model are proposed to describe the piezoelectric coupling. Both are based on the transfer matrix formulation and consider a finite number of patches. It is shown that a simple coupling condition gives a network that approximates the modal properties of the beam. A multimodal tuned mass effect is then obtained and a wide-band damping is introduced by choosing a suitable positioning for resistors in the network. The strategy and the models are experimentally validated by coupling a free-free beam to a completely passive network. A multimodal vibration reduction is observed, which proves the efficiency of the control solution and its potential in term of practical implementation.

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“…So far much of this work has been focused on using local shunt circuits to tune active elements to achieve properties impractical using passive methods [11,12,14]. However recent work by Pope and Daley has investigated using multichannel fully active solutions that could increase metamaterial performance and be adapted online [13].…”

Section: Introductionmentioning

confidence: 99%

An active viscoelastic metamaterial for isolation applications

Reynolds

Daley²

2014

Smart Mater. Struct.

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Abstract. Metamaterials are of interest due to their ability to produce novel acoustic behaviour beyond that seen in naturally occurring media. Of particular interest is the appearance of band gaps which lead to very high levels of attenuation within narrow frequency ranges. Resonant elements within metamaterials allow band gaps to form within the long wavelength limit at low frequencies where traditional passive isolation solutions suffer poor performance. Hence metamaterials may provide a path to high performance, low frequency isolation. Two metamaterials are presented here. An acoustic material consisting of an array of split hollow spheres is developed and its performance validated experimentally. The application of an acoustic/mechanical analogy allows the development of an elastodynamic metamaterial that could be employed as a high performance vibration isolator at low frequencies. A prototype isolator is manufactured and its performance measured. The passively occurring band gap is enhanced using an active control architecture. The use of the active control system in conjunction with the natural passive behaviour of the metamaterial enables high levels of isolation across a broad frequency range. An eventual goal of the work is to produce such materials on a small scale, and as such the metamaterials developed are designed for, and produced using, additive layer manufacturing techniques

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Design of tunable acoustic metamaterials through periodic arrays of resonant shunted piezos

Cited by 242 publications

References 29 publications

Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

Multimodal vibration damping of a beam with a periodic array of piezoelectric patches connected to a passive electrical network

An active viscoelastic metamaterial for isolation applications

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