TIME DEPENDENCE OF PIEZOELECTRIC D33 COEFFICIENT OF CELLULAR PIEZOELECTRET POLYPROPYLENE FILM: FINITE ELEMENT MODELING
In this article, the effective piezoelectric d33 coefficient of cellular piezoelectret polymer film is simulated by means of the finite element method. The cellular piezoelectret film is regarded as a periodic material, where the almost ellipsoidal voids produced by biaxial stretch are considered to be scattered periodically. The hollow oblate tetrakaidecahedron is used to model the charged microvoids. The polymer is take to be isotropic and viscoelastic. Representative volume element is adopted and the periodic boundary conditions are implemented. The electrostatic field coupled to the stress through the Maxwell stress tensor is analyzed. The piezoelectric d33 coefficient in the film thickness direction is phenomenologically defined and numerically obtained. Time dependence of the effective piezoelectric d33 coefficient is presented for different void geometrical parameters.
Cellular piezoelectret Electrostatic analysis Piezoelectric effect Viscoelastic
Liangliang Fan Yongping Wan Zheng Zhong
School of Aerospace Engineering and Applied Mechanics, Tongji University, 200092, Shanghai, P. R. China
国际会议
深圳
英文
332-334
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）