Abstract
Surfaces/interfaces in nanostructures play a significant role in deciding the electro-mechanical coupling properties of piezoelectric nanocomposites. A comprehensive electro-mechanical model of nano-size is developed to predict the effective coupling properties of piezoelectric nanocomposites with coated elliptical nano-fibers. The effects of surfaces/interfaces around the coating layer and the shape of the nano-fibers on the effective elastic modulus and piezoelectric coefficient are considered. Combining the generalized self-consistent method, the electro-elastic surface/interface model, and the mapping method, a closed-form solution of the effective electro-mechanical coupling properties is given. Through numerical calculations, it is found that the elastic modulus and dielectric constant increase with the semi-major axes, while piezoelectric constant expresses different behaviors. The interface effect on the effective electro-elastic moduli is also examined.
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