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.
Ashkan Haji Hosseinloo and Konstantin Turitsyn, "Effective kinetic energy harvesting via structural instabilities," Proc. SPIE 10164, Active and Passive Smart Structures and Integrated Systems 2017, 101641G (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 29, 2017; Published: 11 April 2017); https://doi.org/10.1117/12.2266144.
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