| 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
Places of action
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article
Design and Fabrication of Bioinspired Hierarchical Dissipative Elastic Metamaterials
Abstract
Hierarchical structures with constituents over multiple length scales are found in various natural materials like bones, shells, spider silk and others, all of which display enhanced quasistatic mechanical properties, such as high specific strength, stiffness, and toughness. At the same time, the role of hierarchy on the dynamic behavior of metamaterials remains largely unexplored. This study numerically and experimentally assesses the effect of bioinspired hierarchical organization as well as of viscoelasticity on the wave attenuation properties of continuous elastic metamaterials. We consider single-phase metamaterials formed by self-similar unit cells with different hierarchical levels and types of hierarchy. Two types of structures are considered: a hub-spoke geometry with thin connecting elements and nested hierarchical organization, and a crosslike porous geometry with external hierarchical organization. In the first, hierarchical elements occur at similar size scales, while in the second they differ by one order of magnitude. Results highlight a number of advantages through the introduction of structural hierarchy. Band gaps relative to the corresponding nonhierarchical structures are mostly preserved in both types of structures, but additional hierarchically-induced band gaps also appear, and the hierarchical configuration allows the tuning of band-gap frequencies to lower frequencies in the crosslike porous geometry, with a simultaneous significant reduction of the global structural weight. We show that even small viscoelastic effects are essential in determining the overall attenuation behavior, including between band gaps. Finally, we verify the numerically-predicted multifrequency band gaps by experimental characterization of the transmission properties of crosslike structures. The approach we propose allows the incorporation of hierarchical organization in existing metamaterial configurations, with the corresponding improvement of wave-damping properties, thus extending application possibilities for ...