【作者】 沈星； 刘永刚； 陈勇； 徐志伟；

【Author】 SHEN Xing, LIU Yong-gang, CHEN Yong, XU Zhi-wei ( Department of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

【机构】 南京航空航天大学宇航学院；

【摘要】 以提高交叉指形电极压电纤维复合材料驱动应变为目的,采用有限元方法分析了压电相和聚合物相材料常数对复合材料驱动应变的影响规律。在有限元的后处理阶段,采用了体积平均法求解平均应变。研究结果表明:采用低弹性模量、高泊松比的压电相和聚合物相有利于提高压电片的驱动应变;聚合物相的介电常数对驱动应变影响较大,采用高介电常数的聚合物相可以大大提高驱动应变量。更多还原

【Abstract】 In order to raise the actuating strain of interdigitated electrodes piezoelectric fiber composites , FEM is employed to analyze the influence rules of material constants of piezoelectric and polymer phases on the composite’s whole induced strain. Volume average method is adopted to calculate the average stain of the sample in the post process of FEM. The results show that the actuating strain of inter-digitated electrodes piezoelectric fiber composites can be improved much by selecting piezoelectric and polymer with low Young’s modulus and high Poisson ratio; In addition, much higher induced strain of interdigitated electrodes piezoelectric fiber composites can be got by using polymer phase with high permittivity.更多还原