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利用Eshelby理论及Mori Tanaka平均场原理, 推导出压电陶瓷/聚合物两相复合材料的有效电弹模量表达式。该表达式能反映两相材料复合的物理本质。并以椭圆柱形压电纤维增强的聚合物基复合材料为例,分析压电复合材料的电弹耦合特性。结果表明: 复合材料的平均电弹模量在很大程度上取决于电弹耦合效应;该效应与组成相的空间连接型、体积占有率及压电夹杂形状有关; 耦合效应的存在是由各组成相材料性能差异引起的。
Based on Eshelby theory and Mori Tanaka mean field theory, the effective electric elastic modulus of piezoelectric ceramic / polymer composites was derived. The expression reflects the physical nature of the composite of two phases. Taking the elliptic cylindrical piezoelectric fiber reinforced polymer matrix composites as an example, the electro-elastic coupling characteristics of piezoelectric composites were analyzed. The results show that the average electrical elastic modulus of the composites depends largely on the electro-elastic coupling effect; the effect is related to the spatial connection type, the volume occupation rate and the shape of the piezoelectric inclusion. The coupling effect exists by Composition phase material caused by differences in performance.