Towards the conception of complex engineering meta-structures : Relaxed-micromorphic modelling of low-frequency mechanical diodes/high-frequency screens
| Autor: | Gianluca Rizzi, Domenico Tallarico, Patrizio Neff, Angela Madeo |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
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| Popis: | In this paper we show that an enriched continuum model of the micromorphic type (Relaxed Micromorphic Model) can be used to model metamaterials' response in view of their use for meta-structural design. We focus on the fact that the reduced model's structure, coupled with the introduction of well-posed interface conditions, allows us to easily test different combinations of metamaterials' and classical-materials bricks, so that we can eventually end-up with the conception of a meta-structure acting as a mechanical diode for low/medium frequencies and as a total screen for higher frequencies. Thanks to the reduced model's structure, we are also able to optimize this meta-structure so that the diode-behaviour is enhanced for both "pressure" and "shear" incident waves and for all possible angles of incidence. Comment: 21 pages, 20 figures (47 pictures). arXiv admin note: text overlap with arXiv:2007.14942 |
| Databáze: | OpenAIRE |
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