Spider silk is a remarkable example of bio-material with superior mechanical characteristics. Its multilevel structural organization of dragline and viscid silk leads to unusual and tunable properties, extensively studied from a quasi-static point of view. In this study, inspired by the Nephila spider orb web architecture, we propose a design for mechanical metamaterials based on its periodic repetition. We demonstrate that spider-web metamaterial structure plays an important role in the dynamic response and wave attenuation mechanisms. The capability of the resulting structure to inhibit elastic wave propagation in sub-wavelength frequency ranges is assessed, and parametric studies are performed to derive optimal configurations and constituent mechanical properties. The results show promise for the design of innovative lightweight structures for tunable vibration damping and impact protection, or the protection of large scale infrastructure such as suspended bridges.
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15 August 2016
Research Article|
August 19 2016
Spider web-inspired acoustic metamaterials
Marco Miniaci;
Marco Miniaci
1Laboratoire Ondes et Milieux Complexes,
University of Le Havre
, UMR CNRS 6294, 76600 Le Havre, France
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Anastasiia Krushynska;
Anastasiia Krushynska
2Department of Physics,
University of Torino
, 10125 Torino, Italy
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Alexander B. Movchan;
Alexander B. Movchan
3Department of Mathematical Sciences,
University of Liverpool
, L69 3BX Liverpool, United Kingdom
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Federico Bosia
;
Federico Bosia
a)
2Department of Physics,
University of Torino
, 10125 Torino, Italy
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Nicola M. Pugno
Nicola M. Pugno
a)
4Laboratory of Bio-Inspired and Graphene Nanomechanics, Department of Civil, Environmental and Mechanical Engineering,
University of Trento
, 38123 Trento, Italy
5
Center for Materials and Microsystems
, Fondazione Bruno Kessler, 38123 Povo, Italy
6School of Engineering and Materials Science,
Queen Mary University of London
, London E1 4NS, United Kingdom
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a)
Authors to whom correspondence should be addressed. Electronic addresses: federico.bosia@unito.it and nicola.pugno@unitn.it
Appl. Phys. Lett. 109, 071905 (2016)
Article history
Received:
June 17 2016
Accepted:
August 05 2016
Citation
Marco Miniaci, Anastasiia Krushynska, Alexander B. Movchan, Federico Bosia, Nicola M. Pugno; Spider web-inspired acoustic metamaterials. Appl. Phys. Lett. 15 August 2016; 109 (7): 071905. https://doi.org/10.1063/1.4961307
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