A design strategy to match the band gap of periodic and aperiodic metamaterials

The focus of this paper is on elastic metamaterials characterised by the presence of wide sub-wavelength band gap. In most cases, such mechanical property is strictly connected to the periodic repetition of the unit cell. Nonetheless, the strict periodicity requirement could represent a drawback. In...

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Bibliographic Details
Published in:Scientific reports 2020-10, Vol.10 (1), p.16403-16403, Article 16403
Main Authors: D’Alessandro, Luca, Krushynska, Anastasiia O., Ardito, Raffaele, Pugno, Nicola M., Corigliano, Alberto
Format: Article
Language:English
Subjects:
639/166
639/301/1005
Acoustics
Engineering
Humanities and Social Sciences
Ligaments
Manufacturing
multidisciplinary
Periodicity
Science
Science (multidisciplinary)
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Summary:The focus of this paper is on elastic metamaterials characterised by the presence of wide sub-wavelength band gap. In most cases, such mechanical property is strictly connected to the periodic repetition of the unit cell. Nonetheless, the strict periodicity requirement could represent a drawback. In this paper, we present a design strategy for aperiodic elastic metamaterials in order to achieve the same performances as for the periodic counterparts. This is done by exploiting the concept of separation of modes for different building blocks, arranged in aperiodic fashion. A theoretical explanation is provided, as well as numerical simulations; the concept is validated by means of a set of experimental tests on prototypes that are realized via additive manufacturing.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-73299-3