| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Krushynska, Anastasiia O.
University of Groningen
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Characterizing Dissipative Elastic Metamaterials Produced by Additive Manufacturingcitations
- 2023Analytical characterization of the dynamic response of viscoelastic metamaterialscitations
- 2022Hybrid machine-learning and finite-element design for flexible metamaterial wingscitations
- 2018Design and Fabrication of Bioinspired Hierarchical Dissipative Elastic Metamaterialscitations
- 2017Dissipative elastic metamaterials
- 2017Hierarchical bio-inspired dissipative metamaterials for low frequency attenuationcitations
- 2017The attenuation performance of locally resonant acoustic metamaterials based on generalised viscoelastic modellingcitations
- 2017Coupling local resonance with Bragg band gaps in single-phase mechanical metamaterialscitations
- 2016Multiscale mechanics of dynamical metamaterials
- 2016Visco-elastic effects on wave dispersion in three-phase acoustic metamaterialscitations
- 2014Towards optimal design of locally resonant acoustic metamaterialscitations
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article
Visco-elastic effects on wave dispersion in three-phase acoustic metamaterials
Abstract
This paper studies the wave attenuation performance of dissipative solid acoustic metamaterials (AMMs) with local resonators possessing subwavelength band gaps. The metamaterial is composed of dense rubber-coated inclusions of a circular shape embedded periodically in a matrix medium. Visco-elastic material losses present in a matrix and/or resonator coating are introduced by either the Kelvin-Voigt or generalized Maxwell models. Numerical solutions are obtained in the frequency domain by means of k(omega)-approach combined with the finite element method. Spatially attenuating waves are described by real frequencies omega and complex valued wave vectors k. Complete 3D band structure diagrams including complex-valued pass bands are evaluated for the undamped linear elastic and several visco-elastic AMM cases. The changes in the band diagrams due to the visco-elasticity are discussed in detail; the comparison between the two visco-elastic models representing artificial (Kelvin-Voigt model) and experimentally characterized (generalized Maxwell model) damping is performed. The interpretation of the results is facilitated by using attenuation and transmission spectra. Two mechanisms of the energy absorption, i.e. due to the resonance of the inclusions and dissipative effects in the materials, are discussed separately. It is found that the visco-elastic damping of the matrix material decreases the attenuation performance of AMMs; however, if the matrix material is slightly damped, it can be modeled as linear elastic without the loss of accuracy given the resonator coating is dissipative. This study also demonstrates that visco-elastic losses properly introduced in the resonator coating improve the attenuation bandwidth of AMMs although the attenuation on the resonance peaks is reduced.