Show simple item record Stanton, SC Erturk, A Mann, BP Inman, DJ 2011-04-15T16:46:12Z 2010-10-01
dc.identifier.citation Journal of Applied Physics, 2010, 108 (7)
dc.identifier.issn 0021-8979
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.language.iso en_US en_US
dc.relation.ispartof Journal of Applied Physics
dc.relation.isversionof 10.1063/1.3486519
dc.title Nonlinear piezoelectricity in electroelastic energy harvesters: Modeling and experimental identification
dc.type Journal Article
dc.description.version Version of Record en_US 2010-10-1 en_US
duke.description.endpage 74903 en_US
duke.description.issue 7 en_US
duke.description.startpage 74903 en_US
duke.description.volume 108 en_US
dc.relation.journal Journal of Applied Physics en_US
pubs.issue 7
pubs.organisational-group /Duke
pubs.organisational-group /Duke/Pratt School of Engineering
pubs.organisational-group /Duke/Pratt School of Engineering/Mechanical Engineering and Materials Science
pubs.publication-status Published
pubs.volume 108

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