Micromechanical analysis and finite element modeling of electromechanical properties of active piezoelectric structural fiber (PSF) composites

Qingli Dai; Kenny Ng

doi:10.1117/12.2013819

3 April 2013 Micromechanical analysis and finite element modeling of electromechanical properties of active piezoelectric structural fiber (PSF) composites

Qingli Dai, Kenny Ng

Author Affiliations +

Proceedings Volume 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013; 86890B (2013) https://doi.org/10.1117/12.2013819
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

This paper presents the combined micromechanics analysis and finite element modeling of the electromechanical properties of piezoelectric structural fiber (PSF) composites. The active piezoelectric materials are widely used due to their high stiffness, voltage-dependent actuation capability, and broadband electro-mechanical interactions. However, the fragile nature of piezoceramics limits their sensing and actuating applications. In this study, the active PSF composites were made by deploying the longitudinally poled PSFs into a polymer matrix. The PSF itself consists a silicon carbide (SiC) or carbon core fiber as reinforcement to the fragile piezoceramic shell. To predict the electromechanical properties of PSF composites, the micromechanics analysis was firstly conducted with the dilute approximation model and the Mori-Tanaka approach. The extended Rule of Mixtures was also applied to accurately predict the transverse properties by considering the effects of microstructure including inclusion sizes and geometries. The piezoelectric finite element (FE) modeling was developed with the ABAQUS software to predict the detailed mechanical and electrical field distribution within a representative volume element (RVE) of PSF composites. The simulated energy or deformation under imposed specific boundary conditions was used to calculate each individual property with constitutive laws. The comparison between micromechanical analysis and finite element modeling indicates the combination of the dilute approximation model, the Mori-Tanaka approach and the extended Rule of Mixtures can favorably predict the electromechanical properties of three-phase PSF composites.

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Qingli Dai and Kenny Ng "Micromechanical analysis and finite element modeling of electromechanical properties of active piezoelectric structural fiber (PSF) composites", Proc. SPIE 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013, 86890B (3 April 2013); https://doi.org/10.1117/12.2013819

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KEYWORDS

Composites

Point spread functions

Structured optical fibers

Finite element methods

Polymers

Ferroelectric polymers

Piezoelectric effects

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