Piezoelectric Energy Harvesters with Auxetic Structures
DOI:
https://doi.org/10.70567/mc.v41i13.65Keywords:
Piezoelectric Energy Harvester, PZT-5J, auxectic structureAbstract
The efficiency of power generation in energy harvesting devices can be improved by using auxetic patterns in the substructure of the devices. Auxetic structures have positive influences on the conversion of mechanical energy into electricity due to their properties related to negative Poisson's ratio, which implies that if they are under tension in one direction, they expand in another direction and vice versa. The improved power level will be suitable for power supply of dynamic monitoring sensors. This study presents an auxetic pattern applied to beams in cantilever condition and subjected to harmonic vibration. The influence of the auxetic pattern on power generation is analyzed computationally using COMSOL Multiphysics finite element software. Furthermore, the devices with auxetic patterns are tested experimentally to evaluate the performance of the energy harvesters in comparison with the simple resonator.
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