Analytical formulae for electromechanical effective properties of 3-1 longitudinally porous piezoelectric materials


Autoria(s): BRAVO-CASTILLERO, Julian; RODRIGUEZ-RAMOS, Reinaldo; GUINOVART-DIAZ, Raul; SABINA, Federico J.; AGUIAR, Adair R.; SILVA, Uziel P.; GOMEZ-MUNOZ, Jose Luis
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

18/10/2012

18/10/2012

2009

Resumo

A unidirectional fiber composite is considered here, the fibers of which are empty cylindrical holes periodically distributed in a transversely isotropic piezoelectric matrix, The empty-fiber cross-section is circular and the periodicity is the same in two directions at an angle pi/2 or pi/3. Closed-form formulae for all electromechanical effective properties of these 3-1 longitudinally periodic porous piezoelectric materials are presented. The derivation of such expressions is based on the asymptotic homogenization method as a limit of the effective properties of two-phase transversely isotropic parallel fiber-reinforced composites when the fibers properties tend to zero. The plane effective coefficients satisfy the corresponding Schulgasser-Benveniste-Dvorak universal type of relations, A new relation among the antiplane effective constants from the solutions of two antiplane strains and potential local problems is found. This relation is valid for arbitrary shapes of the empty-fiber cross-sections. Based on such a relation, and using recent numerical results for isotropic conductive composites, the antiplane effective properties are computed for different geometrical shapes of the empty-fiber cross-section. Comparisons with other analytical and numerical theories are presented. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Identificador

ACTA MATERIALIA, v.57, n.3, p.795-803, 2009

1359-6454

http://producao.usp.br/handle/BDPI/17882

10.1016/j.actamat.2008.10.015

http://dx.doi.org/10.1016/j.actamat.2008.10.015

Idioma(s)

eng

Publicador

PERGAMON-ELSEVIER SCIENCE LTD

Relação

Acta Materialia

Direitos

restrictedAccess

Copyright PERGAMON-ELSEVIER SCIENCE LTD

Palavras-Chave #Porous material #Piezoelectricity #Electroceramics #TRANSVERSELY ISOTROPIC CONSTITUENTS #FIBER-REINFORCED COMPOSITE #EFFECTIVE COEFFICIENTS #UNIVERSAL RELATIONS #EXPRESSIONS #SYMMETRY #Materials Science, Multidisciplinary #Metallurgy & Metallurgical Engineering
Tipo

article

original article

publishedVersion