Locally resonant metamaterials are characterized by bandgaps at wavelengths much larger than the lattice size, which enables low-frequency vibration attenuation in structures. Next-generation metastructures (i.e. finite metamaterial-based structures) hosting mechanical resonators as well as piezoelectric interfaces connected to resonating circuits enable the formation of two bandgaps, right above and below the design frequency of the mechanical and electrical resonators, respectively. This new class of hybrid metastructures proposed in this work can therefore exhibit a wider bandgap size and enhanced design flexibility as compared to using a purely mechanical, or a purely electromechanical metastructure alone. To this end, we bridge our efforts on modal analysis of mechanical and electromechanical locally resonant metastructures and establish a fully coupled framework for hybrid mechanical-electromechanical metastructures. Combined bandgap size is approximated in closed form for sufficient number of mechanical and electromechanical resonators. Case studies are presented to understand the interaction of these two locally resonating metastructure domains in bandgap formation, and conclusions are drawn for design and optimization of such hybrid metastructures. Numerical results from modal analysis are compared with dispersion analysis using the plane wave expansion method and the proposed analytical framework is validated succesfully.
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ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–20, 2017
Snowbird, Utah, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5826-4
PROCEEDINGS PAPER
Dynamics of Hybrid Mechanical-Electromechanical Locally Resonant Piezoelectric Metastructures
Christopher Sugino
,
Christopher Sugino
Georgia Institute of Technology, Atlanta, GA
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Massimo Ruzzene
,
Massimo Ruzzene
Georgia Institute of Technology, Atlanta, GA
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Alper Erturk
Alper Erturk
Georgia Institute of Technology, Atlanta, GA
Search for other works by this author on:
Christopher Sugino
Georgia Institute of Technology, Atlanta, GA
Massimo Ruzzene
Georgia Institute of Technology, Atlanta, GA
Alper Erturk
Georgia Institute of Technology, Atlanta, GA
Paper No:
SMASIS2017-3948, V002T03A035; 10 pages
Published Online:
November 9, 2017
Citation
Sugino, C, Ruzzene, M, & Erturk, A. "Dynamics of Hybrid Mechanical-Electromechanical Locally Resonant Piezoelectric Metastructures." Proceedings of the ASME 2017 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Modeling, Simulation and Control of Adaptive Systems; Integrated System Design and Implementation; Structural Health Monitoring. Snowbird, Utah, USA. September 18–20, 2017. V002T03A035. ASME. https://doi.org/10.1115/SMASIS2017-3948
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