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Proceedings Paper

Nonlinearities in resonant dynamics of piezoelectric macro-fiber composite cantilevers
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Paper Abstract

Macro-fiber composite (MFC) piezoelectric materials have been applied to a number of problems requiring high actuation authority, ranging from morphing-wing aircraft to vibration control in flexible structures. Most recently we have employed such MFC structures in underwater bio-inspired locomotion employing large actuation levels. However, utilizing the converse piezoelectric effect to such a degree requires high electric field and strain levels, resulting in significant material and geometric nonlinearities, beyond low field nonlinearities typically encountered in energy harvesting and sensing. In this work, we explore the mathematical framework of an MFC bimorph cantilever under low to moderate excitation levels and compare the results to base excitation and actuation experiments. Further experiments are conducted for actuation experiments which result in high strain and electric field levels, and sources of higher order nonlinearities are proposed.

Paper Details

Date Published: 27 March 2019
PDF: 7 pages
Proc. SPIE 10967, Active and Passive Smart Structures and Integrated Systems XIII, 109670I (27 March 2019); doi: 10.1117/12.2515376
Show Author Affiliations
David Tan, Georgia Institute of Technology (United States)
Alexander K. Kemenov, Georgia Institute of Technology (United States)
Alper Erturk, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 10967:
Active and Passive Smart Structures and Integrated Systems XIII
Alper Erturk, Editor(s)

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