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dc.contributor.authorAbdollahi Hosnijeh, Amir
dc.contributor.authorArias Vicente, Irene
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2016-05-02T12:12:55Z
dc.date.available2017-08-31T00:30:48Z
dc.date.issued2015
dc.identifier.citationAbdollahi, A., Arias, I. Constructive and destructive interplay between piezoelectricity and flexoelectricity in flexural sensors and actuators. "Journal of applied mechanics. Transactions of the ASME", 2015, vol. 82, núm. 12, p. 121003-1-121003-4.
dc.identifier.issn0021-8936
dc.identifier.urihttp://hdl.handle.net/2117/86474
dc.description.abstractFlexoelectricity is an electromechanical effect coupling polarization to strain gradients. It fundamentally differs from piezoelectricity because of its size-dependence and symmetry. Flexoelectricity is generally perceived as a small effect noticeable only at the nanoscale. Since ferroelectric ceramics have a particularly high flexoelectric coefficient, however, it may play a significant role as piezoelectric transducers shrink to the submicrometer scale. We examine this issue with a continuum model self-consistently treating piezo- and flexoelectricity. We show that in piezoelectric device configurations that induce strain gradients and at small but technologically relevant scales, the electromechanical coupling may be dominated by flexoelectricity. More importantly, depending on the device design flexoelectricity may enhance or reduce the effective piezoelectric effect. Focusing on bimorph configurations, we show that configurations that are equivalent at large scales exhibit dramatically different behavior for thicknesses below 100¿nm for typical piezoelectric materials. Our results suggest flexoelectric-aware designs for small-scale piezoelectric bimorph transducers.
dc.language.isoeng
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Anàlisi numèrica::Modelització matemàtica
dc.subject.lcshNumerical analysis
dc.titleConstructive and destructive interplay between piezoelectricity and flexoelectricity in flexural sensors and actuators
dc.typeArticle
dc.subject.lemacAnàlisi numèrica
dc.contributor.groupUniversitat Politècnica de Catalunya. LACÀN - Mètodes Numèrics en Ciències Aplicades i Enginyeria
dc.identifier.doi10.1115/1.4031333
dc.description.peerreviewedPeer Reviewed
dc.subject.amsClassificació AMS::65 Numerical analysis::65K Mathematical programming, optimization and variational techniques
dc.rights.accessOpen Access
local.identifier.drac17551673
dc.description.versionPostprint (author's final draft)
local.citation.authorAbdollahi, A.; Arias, I.
local.citation.publicationNameJournal of applied mechanics. Transactions of the ASME
local.citation.volume82
local.citation.number12
local.citation.startingPage121003-1
local.citation.endingPage121003-4


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