摘要
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。
The explicit expression for effective electroelastic moduli of piezoelectric ceramic/polymer biphase piezocomposite was obtained by employing Eshelby's model and Mori-Tanaka average field theory. The expression can reflect physical insight for piezocomposites. As a practical example, the coupled electroelastic behaviors were analyzed for a piezoelectric elliptic cylindrical fiber reinforced polymer composite. The results show that the average electroelastic moduli depend on the coupled electroelastic effects which have relations to the connectivity, volume fraction and the shape of piezoelectric inclusions. The origin of the coupling effects is related to the existence of mismatch electroelastic moduli of constituents.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2005年第2期121-124,共4页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(50272022)资助项目
武汉市青年晨光计划项目(20045006071 40)
关键词
压电复合材料
电弹模量
耦合
Ceramic materials
Composite materials
Elastic moduli
Fiber reinforced plastics
Polymers
