Sensitivity Analysis and Identification of Damping Parameters in the Finite Element Modeling of Piezoelectric Ceramic Disks

Nicolas Pérez Alvarez; Ronny C. Carbonari; Marco Aurelio B. Andrade; Flavio Buiochi; Julio Cezar Adamowski

doi:10.4028/www.scientific.net/AMR.975.288

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Sensitivity Analysis and Identification of Damping Parameters in the Finite Element Modeling of Piezoelectric Ceramic Disks
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 975Sensitivity Analysis and Identification of Damping...

Sensitivity Analysis and Identification of Damping Parameters in the Finite Element Modeling of Piezoelectric Ceramic Disks

Abstract:

Finite element method is widely used to simulate the behavior of piezoelectric ceramics; however, its application is limited by the knowledge of the material properties. The constitutive equations are well defined for low deformations (linear case) and for materials without energy losses. In the finite element formulation of piezoelectric equations, the energy losses are introduced in several ways. In this paper a methodology to adjust the damping parameters for the two most used models, Rayleigh parameters and complex constitutive equations, is presented. The simplest Rayleigh model uses only two damping constants to model the energy losses; one proportional to the mass matrix and the other proportional to the stiffness matrix. The other model uses complex values for all parameters in the constitutive equations; in this approach ten different damping constants must be determined.

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Advanced Materials Research (Volume 975)

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288-293

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https://doi.org/10.4028/www.scientific.net/AMR.975.288

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Online since:

July 2014

Authors:

Nicolas Pérez Alvarez*, Ronny C. Carbonari, Marco Aurelio B. Andrade, Flavio Buiochi, Julio Cezar Adamowski

Keywords:

Complex Parameters, FEM Optimization, Piezoelectric Properties

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