Energy Harvesting from Coupled Bending-twisting Oscillations in Carbon-fibre Reinforced Laminates

Funding Number

FP/2007–2013

Author's Department

Mechanical Engineering Department

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https://www.sciencedirect.com/science/article/pii/S0888327018300347?via%3Dihub

All Authors

Mengying Xie; Yan Zhang; Marcin J Kraśny; Andrew Rhead; Chris Bowen; Mustafa Arafa

Document Type

Research Article

Publication Title

Mechanical Systems and Signal Processing

Publication Date

12-31-2018

doi

10.1016/j.ymssp.2018.01.026

Abstract

The energy harvesting capability of resonant harvesting structures, such as piezoelectric cantilever beams, can be improved by utilizing coupled oscillations that generate favourable strain mode distributions. In this work, we present the first demonstration of the use of a laminated carbon fibre reinforced polymer to create cantilever beams that undergo coupled bending-twisting oscillations for energy harvesting applications. Piezoelectric layers that operate in bending and shear mode are attached to the bend-twist coupled beam surface at locations of maximum bending and torsional strains in the first mode of vibration to fully exploit the strain distribution along the beam. Modelling of this new bend-twist harvesting system is presented, which compares favourably with experimental results. It is demonstrated that the variety of bend and torsional modes of the harvesters can be utilized to create a harvester that operates over a wider range of frequencies and such multi-modal device architectures provides a unique approach to tune the frequency response of resonant harvesting systems.

First Page

429

Last Page

438

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