Effective properties analysis of a piezoelectric composite including conducting phase using a numerical homogenization approach

Hongming Zhang; Xiaodong He; Rongguo Wang; Lifeng Hao

doi:10.1117/12.921790

12 April 2012 Effective properties analysis of a piezoelectric composite including conducting phase using a numerical homogenization approach

Hongming Zhang, Xiaodong He, Rongguo Wang, Lifeng Hao

Author Affiliations +

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 84092I (2012) https://doi.org/10.1117/12.921790
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

Abstract

Piezoelectric composites find increasing applications in the field of smart materials, mainly as sensors and transducer. However, accurately predicting its performance is still a challenging task. In this paper, we analyzed the electromechanical properties of a three-phase piezoelectric composite with titanate piezoelectric ceramics powders (PZT-5H) and carbon black embedded in an epoxy matrix by a finite element numerical method. A homogenizing micromechanical model is applied, which is capable to provide various property parameters of the piezoelectric composite, such as dielectric constant, piezoelectric constant. The calculation verifies that the electric network formed by the conducting-phase carbon black(CB) can effectively improve the electromechanical performance of the piezoelectric composites. The effect of different content of the carbon black is also taken in consideration in the simulation. A good fit between the calculation and the experimental results clearly shows that the homogenizing modeling is able to accurately predict the electromechanical properties of the three-phase piezoelectric composite. This work will contribute to optimize the material function design and analyze the effect of conduct phase on the piezoelectric composites.

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Hongming Zhang, Xiaodong He, Rongguo Wang, and Lifeng Hao "Effective properties analysis of a piezoelectric composite including conducting phase using a numerical homogenization approach", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84092I (12 April 2012); https://doi.org/10.1117/12.921790

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KEYWORDS

Composites

Dielectrics

Carbon

Ferroelectric materials

Finite element methods

Homogenization

Epoxies

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