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dc.contributorVirginia Tech. Center for Energy Harvesting Materials and Systems (CEHMS)en
dc.contributorSamsung Advanced Institute of Technology. Samsung Electronicsen
dc.contributor.authorCho, Kyung-Hoonen
dc.contributor.authorPark, Hwi-Yeolen
dc.contributor.authorHeo, Jin S.en
dc.contributor.authorPriya, Shashanken
dc.date.accessioned2015-05-04T20:06:13Zen
dc.date.available2015-05-04T20:06:13Zen
dc.date.issued2014-05-28en
dc.identifier.citationJournal of Applied Physics 115, 204108 (2014); doi: 10.1063/1.4879876en
dc.identifier.issn0021-8979en
dc.identifier.urihttp://hdl.handle.net/10919/51992en
dc.description.abstractThis study provides comprehensive analysis of the structure-performance relationships in cantilever-type piezoelectric energy harvesters. It provides full understanding of the effect of all the practical global control variables on the harvester performance. The control variables considered for the analysis were material parameters, areal and volumetric dimensions, and configuration of the inactive and active layers. Experimentally, the output power density of the harvester was maximum when the shape of the beam was close to a square for a constant bending stiffness and a fixed beam area. Through analytical modeling of the effective stiffness for the piezoelectric bimorph, the conditions for enhancing the bending stiffness within the same beam volume as that of a conventional bimorph were identified. The harvester configuration with beam aspect ratio of 0.86 utilizing distributed inactive layers exhibited an giant output power of 52.5 mW and power density of 28.5 mW cm(-3) at 30 Hz under 6.9 m s(-2) excitation. The analysis further indicates that the trend in the output power with varying damping ratio is dissimilar to that of the efficiency. In order to realize best performance, the harvester should be designed with respect to maximizing the magnitude of output power. (C) 2014 AIP Publishing LLC.en
dc.description.sponsorshipSamsung GRO programen
dc.format.extent8 pagesen
dc.format.mimetypeapplication/pdfen
dc.language.isoen_USen
dc.publisherAmerican Institute of Physicsen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPiezoelectric filmsen
dc.subjectActive layeren
dc.subjectElastic modulien
dc.subjectPiezoelectric effectsen
dc.subjectAcceleration measurementen
dc.titleStructure-performance relationships for cantilever-type piezoelectric energy harvestersen
dc.typeArticle - Refereeden
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/jap/115/20/10.1063/1.4879876en
dc.date.accessed2015-04-24en
dc.title.serialJournal of Applied Physicsen
dc.identifier.doihttps://doi.org/10.1063/1.4879876en
dc.type.dcmitypeTexten


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