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Locally resonant metamaterials with shape-memory alloy springs
Author(s): Vagner Candido de Sousa; Christopher Sugino; Carlos De Marqui; Alper Erturk
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Paper Abstract

Locally resonant metamaterials offer bandgap formation for wavelengths much longer than the lattice size, en- abling low-frequency and wideband vibration attenuation. Acoustic/elastic metamaterials made from resonating components usually do not exhibit reconfigurable and adaptive characteristics since the bandgap frequency range (i.e. target frequency and bandwidth combination) is fixed for a given mass ratio and stiffness of the resonators. In this work, we explore locally resonant metamaterials that exploit shape-memory alloy springs in an effort to develop adaptive metamaterials that can exhibit tunable bandgap properties. An analytical model for locally res- onant metastructures (i.e. metamaterials with specific boundary conditions) is combined with a shape-memory spring model of the resonator springs to investigate and exploit the potential of temperature-induced phase transformations and stress-induced hysteretic behavior of the springs. Various case studies are presented for this new class of smart metamaterials and metastructures.

Paper Details

Date Published: 16 March 2018
PDF: 12 pages
Proc. SPIE 10595, Active and Passive Smart Structures and Integrated Systems XII, 1059517 (16 March 2018); doi: 10.1117/12.2302773
Show Author Affiliations
Vagner Candido de Sousa, Univ. de São Paulo (Brazil)
Christopher Sugino, Georgia Institute of Technology (United States)
Carlos De Marqui, Univ. de São Paulo (Brazil)
Alper Erturk, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 10595:
Active and Passive Smart Structures and Integrated Systems XII
Alper Erturk, Editor(s)

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