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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
Towards optimal design of locally resonant acoustic metamaterials
Abstract
The paper presents an in-depth analysis of solid locally resonant acoustic metamaterials (LRAMs) consisting of rubber-coated inclusions. Dispersion properties of two-dimensional LRAMs are studied by means of finite-element modal analysis. For an incompressible rubber, only one practically important spectral band gap is found for in-plane modes in a low-frequency range. This result is in striking contrast with the compressible coating case, previously studied in the literature. For inclusions with a circular cross-section, the lower bound of the band gap can be evaluated exactly by means of the derived analytical solution, which is also valid for compressible coatings and can therefore be used to determine lower bounds of higher band gaps as well. The influence of geometric and material parameters, filling fraction and inclusion shape on the width of the lowest band gap is investigated in detail. Based on the results of this analysis, an optimal microstructure of LRAMs yielding the widest low-frequency band gap is proposed. To achieve the band gap at the lowest possible frequencies in LRAMs suitable for practical applications, the use of the tungsten core material is advised, as a safe and economically viable alternative to commonly considered lead and gold. Two configurations of LRAM with various sizes of coated tungsten cylindrical inclusions with circular cross-section are considered. The evolution of dispersion spectra due to the presence of different inclusions is investigated, and the parameters for optimal design of LRAMs are determined. © 2014 Elsevier Ltd.