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Improving Energy Harvesting from Cantilever-Like Structures Based on Beam Geometry
  • polat kurt,
  • Sadettin Orhan
polat kurt
Ankara Yildirim Beyazit Universitesi

Corresponding Author:[email protected]

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Sadettin Orhan
Ankara Yildirim Beyazit Universitesi
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Abstract

The power gain from the piezoelectric harvesters depends on the several parameters and one of them is to design the substructure as to increase the mechanical strain occurred in the piezoelectric material. In this study, the effectiveness of auxetic structures is investigated by comparing them to non-auxetic nonlinear structures rather than comparing them to the plain structures unlike the literature. It is shown that the power gain from auxetic structures is very high compared to plain structures; however, this increase in power can also be achieved using a non-auxetic simple rectangular structure in some cases. The increase in the power gain using the auxetic structures is due to the increase in the strain in the longitudinal direction, and the effect of the sign change in the perpendicular direction is not very effective on the response. In the second part of the study, four new shapes inspired by Re-entrant structure are presented for increased power response, and power responses of these structures are evaluated under different cases. The results show that new structures outperformed the plain structure in all cases and performed better from the auxetic structure in some cases. A combination of finite element analysis and experimental study is implemented in the study.