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Proceedings Paper

Effective kinetic energy harvesting via structural instabilities
Author(s): Ashkan Haji Hosseinloo; Konstantin Turitsyn
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Paper Abstract

Vibration energy harvesting has been shown as a promising power source for many small-scale applications mainly because of the considerable reduction in the energy consumption of the electronics, ease of fabrication and implementation of smart materials at small scale, and scalability issues of the conventional batteries. However, conventional energy harvesters are not quite robust to changes in excitation or system parameters, suffer from narrow bandwidth, and are very inefficient at small scale for low frequency harvesting. In addition, they have a low power to volume ratio. To remedy the robustness issues, improve their effectiveness, and increase their power density, we propose to exploit structural instabilities, in particular instabilities in multi-layered composites which are inherently non-resonant. The induced large strains as a result of the structural instability could be exploited to give rise to large strains in an attached piezoelectric layer to generate charge and, hence, energy. The regular high-strain morphological patterns occur throughout the whole composite structure that in turn enable harvesting at a larger volume compared to conventional harvesters; hence, harvesting via structural instabilities can significantly improve the harvested power to volume ratio. In this study, we focus on harvesting from wrinkling type of instabilities.

Paper Details

Date Published: 11 April 2017
PDF: 9 pages
Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101641G (11 April 2017); doi: 10.1117/12.2266144
Show Author Affiliations
Ashkan Haji Hosseinloo, Massachusetts Institute of Technology (United States)
Konstantin Turitsyn, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 10164:
Active and Passive Smart Structures and Integrated Systems 2017
Gyuhae Park, Editor(s)

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