Titre du document / Document title

Modeling polycrystalline behavior of piezoceramics

Auteur(s) / Author(s)

FOTINICH Y. ⁽¹⁾ ; CARMAN G. P. ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Mechanical and Aerospace Engineering Department, University of California, Los Angeles, 38-137, Engineering 4, Los Angeles, CA 90095, ETATS-UNIS

Résumé / Abstract

Piezoelectric polycrystalline ceramics consists of a large number of polarized crystallites (domains) oriented along random directions. When subjected to an excessive electro-mechanical load, each domain may undergo polarization switching resulting in a nonlinear macroscopic behavior of the piezoceramic. In this article a finite element code is developed to simulate this nonlinear behavior. The polycrystalline piezoceramic is modeled as an aggregate of finite elements with each domain represented by a finite element. Each element within this model is oriented in a random direction and is allowed to undergo polarization switchings when a criterion is exceeded. All domains are assumed to possess tetragonal structure. The dielectric, strain, and stress-strain macroscopic responses of the material are generated by the model. The analytical results are compared with experimental data and reasonable agreement is achieved.

Revue / Journal Title

Ferroelectrics   ISSN 0015-0193   CODEN FEROA8 

Source / Source

2002, vol. 274, pp. 101-119 [19 page(s) (article)] (16 ref.)

Langue / Language

Anglais

Editeur / Publisher

Taylor and Francis, London, ROYAUME-UNI  (1970) (Revue)

Mots-clés anglais / English Keywords

Piezoceramic materials ; Tetragonal lattices ; Polycrystals ; Domain structure ; Electrical switching ; Theoretical study ; Non linear effect ; Finite element method ; Polarization ; Stress-strain relations ; Modelling ;

Mots-clés français / French Keywords

Céramique piézoélectrique ; Réseau quadratique ; Polycristal ; Structure domaine ; Commutation électrique ; Etude théorique ; Effet non linéaire ; Méthode élément fini ; Polarisation ; Relation contrainte déformation ; Modélisation ;

Mots-clés espagnols / Spanish Keywords

Conmutación eléctrica ; Efecto no lineal ;

Localisation / Location

INIST-CNRS, Cote INIST : 4466, 35400010499573.0070