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Accordion-like metamaterials with tunable ultra-wide low-frequency band gaps

Krushynska, A. O. and Amendola, A. and Bosia, F. and Daraio, C. and Pugno, N. M. and Fraternali, F. (2018) Accordion-like metamaterials with tunable ultra-wide low-frequency band gaps. New Journal of Physics, 20 (7). Art. No. 073051. ISSN 1367-2630. doi:10.1088/1367-2630/aad354.

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Composite materials with engineered band gaps are promising solutions for wave control and vibration mitigation at various frequency scales. Despite recent advances in the design of phononic crystals and acoustic metamaterials, the generation of wide low-frequency band gaps in practically feasible configurations remains a challenge. Here, we present a class of lightweight metamaterials capable of strongly attenuating low-frequency elastic waves, and investigate this behavior by numerical simulations. For their realization, tensegrity prisms are alternated with solid discs in periodic arrangements that we call 'accordion-like' meta-structures. They are characterized by extremely wide band gaps and uniform wave attenuation at low frequencies that distinguish them from existing designs with limited performance at low-frequencies or excessively large sizes. To achieve these properties, the meta-structures exploit Bragg and local resonance mechanisms together with decoupling of translational and bending modes. This combination allows one to implement selective control of the pass and gap frequencies and to reduce the number of structural modes. We demonstrate that the meta-structural attenuation performance is insensitive to variations of geometric and material properties and can be tuned by varying the level of prestress in the tensegrity units. The developed design concept is an elegant solution that could be of use in impact protection, vibration mitigation, or noise control under strict weight limitations.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Krushynska, A. O.0000-0003-3259-2592
Amendola, A.0000-0002-2562-881X
Bosia, F.0000-0002-2886-4519
Daraio, C.0000-0001-5296-4440
Pugno, N. M.0000-0003-2136-2396
Fraternali, F.0000-0002-7549-6405
Additional Information:© 2018 The Author(s). Published by IOP Publishing Ltd on behalf of Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 5 April 2018; Accepted 13 July 2018; Accepted Manuscript online 13 July 2018; Published 31 July 2018. AA, FB, NMP, and FF acknowledge financial support from the Italian Ministry of Education, University and Research (MIUR) under the 'Departments of Excellence' grant L.232/2016. NMP is supported by the European Commission under the Graphene Flagship Core 2 grant No. 785219 (WP14 'Composites') and with FB by the FET Proactive 'Neurofibres' grant No. 732344. FB also acknowledges the support by Progetto d'Ateneo/Fondazione San Paolo 'Metapp', n. CSTO160004.
Funding AgencyGrant Number
Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)L.232/2016
European Commission785219
European Commission732344
University of TurinCSTO160004
Subject Keywords:wave dynamics, elastic metamaterial, tensegrity structure, ultra-wide band gap, low-frequency range
Issue or Number:7
Record Number:CaltechAUTHORS:20180816-073517360
Persistent URL:
Official Citation:A O Krushynska et al 2018 New J. Phys. 20 073051
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88838
Deposited By: Tony Diaz
Deposited On:16 Aug 2018 16:20
Last Modified:12 Jul 2022 19:46

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