Effective properties evaluation for smart composite materials

Autor(es)

Ricardo de Medeiros ^[1] ; Mariano E. Moreno ^[2] ; Flávio D. Marques ^[3] ; Volnei Tita ^[4]

Afiliação do(s) autor(es)

^[1] University of São Paulo. Engineering School of São Carlos. Department of Aeronautical Engineering - Brasil

^[2] Federal University of São Carlos. Center of Exact Sciences and Technology - Brasil

^[3] University of São Paulo. Engineering School of São Carlos. Department of Aeronautical Engineering - Brasil

^[4] University of São Paulo. Engineering School of São Carlos. Department of Aeronautical Engineering - Brasil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 34, p. 362-370, 2012-00-00.

Resumo

The purpose of this article is to present a method which consists in the development of unit cell numerical models for smart composite materials with piezoelectric fibers made of PZT embedded in a non-piezoelectric matrix (epoxy resin). This method evaluates a globally homogeneous medium equivalent to the original composite, using a representative volume element (RVE). The suitable boundary conditions allow the simulation of all modes of the overall deformation arising from any arbitrary combination of mechanical and electrical loading. In the first instance, the unit cell is applied to predict the effective material coefficients of the transversely isotropic piezoelectric composite with circular cross section fibers. The numerical results are compared to other methods reported in the literature and also to results previously published, in order to evaluate the method proposal. In the second step, the method is applied to calculate the equivalent properties for smart composite materials with square cross section fibers. Results of comparison between different combinations of circular and square fiber geometries, observing the influence of the boundary conditions and arrangements are presented. (AU)

• Processo FAPESP: 09/00544-5 - Estudo de modelos de dano e falha progressiva para estruturas em materiais compósitos
• Beneficiário: Volnei Tita
• Modalidade de apoio: Auxílio à Pesquisa - Regular