Parameter Identification of the Nonlinear Piezoelectric Shear d15 Coefficient of a Smart Composite Actuator

Autor:	Pelin Berik, Peter L. Bishay
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	nonlinear piezoceramic d15 shear-mode composite optimization Materials of engineering and construction. Mechanics of materials TA401-492 Production of electric energy or power. Powerplants. Central stations TK1001-1841
Zdroj:	Actuators, Vol 10, Iss 7, p 168 (2021)
Druh dokumentu:	article
ISSN:	10070168 2076-0825
DOI:	10.3390/act10070168
Popis:	The objective of this work is to characterize the nonlinear dependence of the piezoelectric d15 shear coefficient of a composite actuator on the static electric field and include this effect in finite element (FE) simulations. The Levenberg-Marquardt nonlinear least squares optimization algorithm implemented in MATLAB was applied to acquire the piezoelectric shear coefficient parameters. The nonlinear piezoelectric d15 shear constant of the composite actuator integrated with piezoceramic d15 patches was obtained to be 732 pC/N at 198 V. The experimental benchmark was simulated using a three-dimensional piezoelectric FE model by taking piezoelectric nonlinearity into consideration. The results revealed that the piezoelectric shear d15 coefficient increased nonlinearly under static applied electric fields over 0.5 kV/cm. A comparison between the generated transverse deflections of the linear and nonlinear FE models was also performed.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/0f53c1997f3a40418e1ff31ad7aa07fa Zobrazit plný text záznamu View record in DOAJ