Nonlinear piezoelectricity in electroelastic energy harvesters: Modeling and experimental identification

dc.contributor.author

Stanton, SC

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Erturk, A

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Mann, BP

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Inman, DJ

dc.date.accessioned

2011-04-15T16:46:12Z

dc.date.issued

2010-10-01

dc.description.abstract

We propose and experimentally validate a first-principles based model for the nonlinear piezoelectric response of an electroelastic energy harvester. The analysis herein highlights the importance of modeling inherent piezoelectric nonlinearities that are not limited to higher order elastic effects but also include nonlinear coupling to a power harvesting circuit. Furthermore, a nonlinear damping mechanism is shown to accurately restrict the amplitude and bandwidth of the frequency response. The linear piezoelectric modeling framework widely accepted for theoretical investigations is demonstrated to be a weak presumption for near-resonant excitation amplitudes as low as 0.5 g in a prefabricated bimorph whose oscillation amplitudes remain geometrically linear for the full range of experimental tests performed (never exceeding 0.25% of the cantilever overhang length). Nonlinear coefficients are identified via a nonlinear least-squares optimization algorithm that utilizes an approximate analytic solution obtained by the method of harmonic balance. For lead zirconate titanate (PZT-5H), we obtained a fourth order elastic tensor component of c1111p =-3.6673× 1017 N/m2 and a fourth order electroelastic tensor value of e3111 =1.7212× 108 m/V. © 2010 American Institute of Physics.

dc.description.version

Version of Record

dc.identifier.issn

0021-8979

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https://hdl.handle.net/10161/3366

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en_US

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AIP Publishing

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Journal of Applied Physics

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10.1063/1.3486519

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Journal of Applied Physics

dc.title

Nonlinear piezoelectricity in electroelastic energy harvesters: Modeling and experimental identification

dc.type

Journal article

duke.date.pubdate

2010-10-1

duke.description.issue

7

duke.description.volume

108

pubs.begin-page

74903

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7

pubs.organisational-group

Duke

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Mechanical Engineering and Materials Science

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Pratt School of Engineering

pubs.publication-status

Published

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108

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