Journal
COMPOSITE STRUCTURES
Volume 261, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2021.113570
Keywords
Wearable electronic; Energy harvesting; Buckled piezoelectric ribbon-substrate; structure; Harmonic balance method; Dynamic behaviour
Categories
Funding
- National Natural Science Foundation of China [11802319]
- Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University [CX202044]
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This study investigates the dynamic behavior of an energy harvester constructed by piezoelectric ribbons and explores the influence of pre-strain and substrate's Young's modulus on its dynamic response. By modulating these two parameters, the voltage output performance of the energy harvester can be improved.
With utilizing of the wearable electronics in daily life, the energy harvesting problem of the electronic devices has become an urgent problem. In this paper, the dynamic behaviour of the energy harvester, which is constructed by bonding piezoelectric ribbons on a pre-strained compliant substrate, is investigated. Taking the geometrical nonlinearity into account, and by using the extended Lagrange equations, the governing equations of the buckled piezoelectric energy harvester are derived. To obtain the steady-state dynamic responses of the governing equations, the harmonic balance method is used. The analytical solutions, which predict the influences of the pre-strain and substrate's Young's modulus on the dynamic response of the energy harvester, are obtained. Several numerical examples are carried out to discuss the effects of the pre-strain and substrate's Young's modulus on energy harvester dynamic performance. By modulating those two parameters, the highenergy orbit of the buckled structure would be modulated, which is helpful for improving the voltage output performance of the energy harvesting. The results of this paper would be useful for the optimization of energy harvester based on the buckled piezoelectric ribbon-substrate structure.
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