Metadamping and energy dissipation enhancement via hybrid phononic resonators

DePauw, D.; Ba’ba’a, H. Al; Nouh, M.

doi:10.1016/j.eml.2017.11.002

Cited by 47 publications

(16 citation statements)

References 33 publications

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“…The first notions on the beneficial effects of viscous damping in acoustic metamaterials were reported by Hussein and Frazier [9], who introduced the concept of metadamping to refer to the damping emergence phenomenon produced as a result of combining the effects of local resonance with viscous dissipation. The concept of metadamping has also been explored in more detail in subsequent works [6] and the idea of acoustic metamaterial configurations based on this (phononic resonators) has been proposed by DePauw et al [5]. This phenomenon has also been studied more recently in the context of acoustic metamaterials in the work of Manimala and Sun [14], where they show, by means of an analytical approach, the dispersion properties of LRAMs with different models of viscoelastic (dissipative) behaviour for the coating material, and the works of Krushynska et al [11] and Lewinska et al [12], in which generalized viscoelastic modelling is introduced in the study of the attenuation performance of LRAMs.…”

Section: Motivationmentioning

confidence: 99%

Computational design of locally resonant acoustic metamaterials

Roca¹,

Yago²,

Cante³

et al. 2019

Computer Methods in Applied Mechanics and Engineering

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The so-called Locally Resonant Acoustic Metamaterials (LRAM) are considered for the design of specifically engineered devices capable of stopping waves from propagating in certain frequency regions (bandgaps), this making them applicable for acoustic insulation purposes. This fact has inspired the design of a new kind of lightweight acoustic insulation panels with the ability to attenuate noise sources in the low frequency range (below 5000 Hz) without requiring thick pieces of very dense materials. A design procedure based on different computational mechanics tools, namely, (1) a multiscale homogenization framework, (2) model order reduction strategies and (3) topological optimization procedures, is proposed. It aims at attenuating sound waves through the panel for a target set of resonance frequencies as well as maximizing the associated bandgaps. The resulting design's performance is later studied by introducing viscoelastic properties in the coating phase, in order to both analyse their effects on the overall design and account for more realistic behaviour. The study displays the emerging field of Computational Material Design (CMD) as a computational mechanics area with enormous potential for the design of metamaterial-based industrial acoustic parts.

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Section: Motivationmentioning

confidence: 99%

Computational design of locally resonant acoustic metamaterials

Roca¹,

Yago²,

Cante³

et al. 2019

Computer Methods in Applied Mechanics and Engineering

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“…The authors show how certain Bloch wave modes of the system correspond to the resonance frequencies of the resonator chain. DePauw et al 2018 [19] propose a conguration called a Phononic Resonator in which each resonator can directly interact with the neighboring masses in the main chain. It is then shown how tuning the stiness and mass ratios of the main and resonator masses can change the nature of the attenuation mechanism leading to the system behaving as a Phononic Crystal or an Acoustic Metamaterial.…”

Section: Discussionmentioning

confidence: 99%

Dynamics of metamaterial beams consisting of periodically-coupled parallel flexural elements: a theoretical study

Hajarolasvadi

Elbanna

2019

J. Phys. D: Appl. Phys.

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Periodic systems have attracted a lot of attention in science and engineering due to the existence of band gaps in their frequency spectra. Here, we study the exural wave propagation in beams that are periodically connected in parallel and investigate how the contrast in the material and cross-sectional properties may aect the band structure of these systems and their dispersion properties. Results suggest that by changing the mass and stiness ratios of the two beams, or by changing the inter-beam connection compliance, several band gaps may emerge and that the band gap width, the lowest band gap edge frequency, as well as the nature of attenuation within the gap may be tuned. Furthermore, by considering a hierarchical system of periodically-connected beam elements with dierent unit cell sizes, we show how the interplay between scales may aect the overall dispersion properties of the system by opening and closing band gaps at dierent frequencies. These ndings suggest that a modular design approach may lead to novel dispersion properties in beam structures. Finally, using a Frequency Response Function approach, we show that the aforementioned results hold in the limit of nite structures.

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“…Similar results were also confirmed by Liu and co-workers. [41,44] Meanwhile, Chen et al [45] also used piezoelectric stacking and additional loss circuits to increase the attenuation characteristics in the bandgap, as illustrated in Figure 3d.…”

Section: Locally Resonant Structurementioning

confidence: 99%

Acoustic Metamaterials: A Review of Theories, Structures, Fabrication Approaches, and Applications

Liao

Luan

Wang

et al. 2021

Adv Materials Technologies

100

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Acoustic metamaterials (AMs), which are materials composed of subwavelength periodic artificial structures with specific designs, have drawn significant research attention. This is because of the extraordinary abilities of AMs to manipulate acoustic waves compared with those of traditional acoustic materials. In this review, current advances in AM research are comprehensively investigated and summarized. First, major theories regarding AMs, including the acoustic wave equation, crystal lattice and energy band theory, effective medium theory, and general Snell's law, are explained in detail. Existing AM structures are then described and divided into several categories based on their structural characteristics and responses to acoustic waves. Furthermore, to bridge the gap between design and practical application, both conventional and advanced AM manufacturing methods are summarized. The applications of AMs in the fields of acoustic cloaking, acoustic lensing, acoustic absorption, noise reduction, and supernormal sound transmission are particularly delineated. Finally, contemporary challenges, trends, and strategies relevant to AMs are discussed. This review aims to provide a comprehensive collection of AM‐related knowledge, including information regarding physical theories, structures, fabrication approaches, and applications, which will help promote the further development of AMs.

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Metadamping and energy dissipation enhancement via hybrid phononic resonators

Cited by 47 publications

References 33 publications

Computational design of locally resonant acoustic metamaterials

Computational design of locally resonant acoustic metamaterials

Dynamics of metamaterial beams consisting of periodically-coupled parallel flexural elements: a theoretical study

Acoustic Metamaterials: A Review of Theories, Structures, Fabrication Approaches, and Applications

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