摘要
叉指式压电纤维复合材料(Interdigitated Electrodes Piezoelectric Fiber Composites,IDEPFC)利用纤维形的压电相和叉指形电极相互作用,提高了复合材料的韧性,因其特有的压电正交异性驱动性能,在智能材料与结构中有着广泛的应用前景。基于COMSOL Multiphysics仿真计算平台,采用有限元分析方法,计算了1-3型压电陶瓷纤维复合材料中关键的叉指式电极(IDE)几何尺寸与压电陶瓷纤维基体的度之间的关系对IDEPFC驱动性能的影响规律,分析了压电陶瓷纤维直径、分支电极宽度与电极间隙对叉指式压电纤维复合材料驱动应变的变化影响趋势。结果表明:当电极宽度等于基体厚度的一半时,可得到最优的正交异性驱动性能;采用直径越小的压电陶瓷纤维,从而减少基体厚度,有助于提高IDEPFC的驱动灵敏度;减小电极间隙可以降低驱动电压,当电极间隙与基体厚度的比值大于4时,可以获得最大的驱动应变。研究成果为叉指式压电纤维复合材料的优化设计提供了理论指导。
Interdigitated Electrodes Piezoelectric Fiber Composites use the interaction of fiber finger shaped piezoelectric phase and interdigitated electrodes interaction to improve the toughness.Because of its peculiar orthotropic piezoelectric driving property,Interdigitated Electrodes Piezoelectric Fiber Composites have a broad application prospect in the smart material and structure.Based on COMSOL Multiphysics simulation platform,using the finite element analysis method,the influence of the relationship between the geometry size of the interdigitated electrodes and the thickness of the piezoelectric fiber matrix on the driving property of 1-3 piezoelectric fiber composites material was calculated.The influence of the fiber diameter,branch interdigitated electrode width and electrode gap on the trend of driving strain in piezoelectric fiber composites was also analyzed.The results show that the electrodes width equal to half the thickness of the substrate,the optimal orthotropic driving property can be obtained.Using the piezoelectric fiber of smaller diameter for reduced substrate thickness can help to improve IDEPFC driving sensitivity.Reducing the electrode gap can reduce the driving voltage,and the biggest driving strain can be obtained when the ratio of the electrodes gap to the substrate thickness is greater than 4.Results of the research provide a theoretical guidance for the design optimization of the interdigital piezoelectric fiber composites material.
出处
《陶瓷学报》
CAS
北大核心
2013年第4期467-472,共6页
Journal of Ceramics
关键词
有限元分析
1-3型压电纤维复合材料
叉指式电极
性能
finite element analysis
1-3 Piezoelectric Fiber Composites
interdigitated electrodes
performance
