On forward and reverse coupling of vibrating piezoelectric energy harvesters
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/190284
Tipus de documentText en actes de congrés
Data publicació2017
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
This document provides information about the analysis of effects coupling
the mechanical and the electrical phenomena going on inside a piezoelectric energy har-
vester. Two characteristics are exploited in energy harvesting: direct piezoelectric effect where
stress is resulting by the application of an electric field and reverse effect showing an electric
field resulting by stress application. Piezoelectric patches, bonded on beams free to vibrate under
a mechanical stimulus, can be used as active elements. Point-wise material characteristics are
described by symmetric matrices coupling together stress and electric field to the strain and the
electric polarisation leading to reciprocal direct and reverse effects. Under operating conditions,
the stress and electric field values applied to the material patch are not uniform and do not have
the same spatial pattern resulting in a non reciprocal interaction. An explanation of this
phenomenon is attempted by applying the Euler-Bernoulli beam theory model that allows the
computation of two geometrical coefficients for direct and inverse interactions under uniform
stress distribution. Com- parisons versus experiments carried out on a Macro Fiber Composite
piezoelectric patch
show that the model is able to estimate the effect.
ISBN978-84-946909-2-1
Fitxers | Descripció | Mida | Format | Visualitza |
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Coupled-2017-09-On forward and reverse.pdf | 743,7Kb | Visualitza/Obre |