The present paper studies the effects of local field fluctuations on effective electromechanical coupling coefficients of piezoelectric composites containing short fiber. Finite element method is applied to study the overall behaviour of such composites. Geometric models containing spheroid inclusion of two fiber arrangements SC and BCC are modelled with finite element method to predict the effective coefficients. Results thus obtained are validated with results obtained from analytical method based on Eshelby’s solution to ellipsoidal inclusion problem. The analytical solution obtained through Eshelby method is generalized for spheroid inclusion so that to compare the results with FEM study. All finite element studies are carried through finite element package software ANSYS 18.0. A detailed analysis of results is presented to better understand the behaviour of such composites and their effective property variation with change in fiber volume fraction.

中文翻译：

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含短纤维的压电复合材料有效性能的确定

本文研究了局部场涨落对含短纤维的压电复合材料有效机电耦合系数的影响。应用有限元方法研究了这种复合材料的整体性能。使用有限元方法对包含两个纤维排列SC和BCC的球状包裹体的几何模型进行建模，以预测有效系数。如此获得的结果将通过基于埃舍尔比解决椭圆形夹杂问题的分析方法获得的结果进行验证。通过Eshelby方法获得的分析溶液被推广用于球体的包裹，以便将结果与FEM研究进行比较。所有有限元研究都通过有限元软件包ANSYS 18.0进行。