An auxetic nonlinear piezoelectric energy harvester for enhancing efficiency and bandwidth

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Keyu Chen
  • Qiang Gao
  • Shitong Fang
  • Donglin Zou
  • Wei-Hsin Liao

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number117274
Journal / PublicationApplied Energy
Volume298
Online published23 Jun 2021
Publication statusPublished - 15 Sep 2021

Abstract

In this paper, we design and experimentally validate an auxetic nonlinear piezoelectric energy harvester. This harvester adopts a clamp-clamp beam with auxetic structures, which can improve the efficiency and bandwidth of the energy harvesting based on a pure mechanical structure without outer magnets or stoppers. Finite element analysis is performed to analyse the effects of the auxetic structures on the efficiency and nonlinearity of the energy harvester. The lumped parameter model is utilized to predict the performance of the energy harvester, which well matches the experimental results. In the experimental validation, at 0.1 g base acceleration, the power output of the two types of auxetic energy harvesters is 173% and 94% higher than the conventional nonlinear energy harvester. Besides, the bandwidths of the two types of auxetic energy harvesters are broadened by 1556% and 2142% compared with the linear systems.

Citation Format(s)

An auxetic nonlinear piezoelectric energy harvester for enhancing efficiency and bandwidth. / Chen, Keyu; Gao, Qiang; Fang, Shitong; Zou, Donglin; Yang, Zhengbao; Liao, Wei-Hsin.

In: Applied Energy, Vol. 298, 117274, 15.09.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review