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研究含周期分布压电纤维的压电复合材料的有效电弹性性能。通过在材料代表性体积单元边界上施加位移和电势周期边界条件,利用有限元法求得了代表性体积单元内的电弹性场。由平均电弹性场和压电复合材料有效电弹性性能定义,预测了圆环形截面压电纤维复合材料的有效电弹性系数。通过算例,比较了相同压电材料体积分数下圆环形截面压电纤维复合材料与圆截面压电纤维复合材料有效电弹性性能的差异,讨论了圆环形截面压电纤维内部非压电填充物的力学性质对有效压电系数的影响。该文结论可为高灵敏度压电复合材料设计提供参考。
The effective electro-elastic properties of piezoelectric composites with periodic distribution of piezoelectric fibers are investigated. By applying the displacement and potential periodic boundary conditions on the boundary of material representative volume unit, the elastic field in the representative volume unit was found by finite element method. Based on the definition of the effective electro-elastic properties of the piezoelectric field and the piezoelectric composite materials, the effective coefficient of elasticity of the circular cross-section piezoelectric fiber composites is predicted. The difference of the effective electro-mechanical properties between the circular-section piezoelectric fiber composite and the circular-section piezoelectric fiber composite under the same volume fraction of the piezoelectric material is compared by an example. The internal non-piezoelectric Effect of Mechanical Properties of Filler on Effective Piezoelectric Coefficient. The conclusion can provide a reference for the design of high-sensitivity piezoelectric composite materials.