| 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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Bosia, Federico
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Multiscale static and dynamic mechanical study of the <i>Turritella terebra</i> and <i>Turritellinella tricarinata</i> seashellscitations
- 2022Prey localization in spider orb webs using modal vibration analysiscitations
- 2021Improving rubber concrete strength and toughness by plasma‐induced end‐of‐life tire rubber surface modificationcitations
- 2021Topologically engineered 3D printed architectures with superior mechanical strengthcitations
- 2020A combined experimental/numerical study on the scaling of impact strength and toughness in composite laminates for ballistic applicationscitations
- 2019Evolution of aerial spider webs coincided with repeated structural optimization of silk anchoragescitations
- 2018Design and Fabrication of Bioinspired Hierarchical Dissipative Elastic Metamaterialscitations
- 2017Spider silk reinforced by graphene or carbon nanotubescitations
- 2017Multiscale composites based on carbon fibers and carbon nanotubes
- 2016An experimental and numerical study on the mechanical properties of carbon nanotube-latex thin filmscitations
- 2015A hierarchical lattice spring model to simulate the mechanics of 2-D materials-based compositescitations
- 2014Structural reinforcement and failure analysis in composite nanofibers of graphene oxide and gelatincitations
- 2013Direct measurement and modelling of internal strains in ion-implanted diamondcitations
- 2002Deformation characteristics of composite laminates - part II: an experimental/numerical study on equivalent single-layer theoriescitations
- 2002Deformation characteristics of composite laminates - part 1: speckle interferometry and embedded Bragg grating sensor measurementscitations
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 ...