Micromechanical models for the effective electromechanical properties of cellular piezoelectret polymer film

Yongping Wan; Longtao Xie; Zheng Zhong

doi:10.1117/12.921059

12 April 2012 Micromechanical models for the effective electromechanical properties of cellular piezoelectret polymer film

Yongping Wan, Longtao Xie, Zheng Zhong

Author Affiliations +

Proceedings Volume 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering; 840921 (2012) https://doi.org/10.1117/12.921059
Event: Third International Conference on Smart Materials and Nanotechnology in Engineering, 2011, Shenzhen, China

Abstract

Cellular piezoelectret film is actually the voided charged polymer film. They show very large piezoelectric effect in the film thickness direction, and have great potential in the application of flexible electromechanical sensor. In this paper, cellular piezoelectret film is considered as a composite where the voids containing charges of opposite polarities are viewed as inclusions, while the polymer as matrix. We develop a micromechanical model to find the effective electromechanical moduli of cellular piezoelectret film. Sensitivity analysis is presented for effective electromechanical moduli with respect to void parameters. Furthermore, this micromechanical formulation is extended to include the viscoelastic deformation of polymer matrix. Temporal evolution of the effective properties, including elastic modulus and piezoelectric d₃₃ coefficient in the film thickness, of cellular piezoelectret film can be obtained.

Citation Download Citation

Yongping Wan, Longtao Xie, and Zheng Zhong "Micromechanical models for the effective electromechanical properties of cellular piezoelectret polymer film", Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 840921 (12 April 2012); https://doi.org/10.1117/12.921059

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