改性1-3型压电复合材料理论模型与仿真

Theoretical Model and Simulation of Improved 1-3 Piezoelectric Composite

针对高机电耦合系数和曲面换能器的应用需求,该文提出一种由压电陶瓷、环氧树脂和硅橡胶三相复合的改进1-3型压电复合材料,基于Newnhams串、并联分析对复合材料的理论模型进行了推导,并利用Matlab进行了数值计算,分析了改性1-3型复合材料的结构参数对厚度机电耦合系数、等效密度和厚度频率常数的影响。结果表明,陶瓷-环氧复合相的体积分数为0.2~0.5,陶瓷-环氧复合相中的压电陶瓷体积分数为0.6~0.7时,改性1-3型压电复合材料的性能参数较好;利用ANSYS软件对复合材料进行了有限元仿真,将仿真结果与理论计算进行了对比,二者具有较好的一致性,验证了理论模型评估材料性能的准确性。

For the application requirements of high electromechanical coupling coefficient and curved surface transducers,this paper proposes an improved 1-3 piezoelectric composite composed of piezoelectric ceramics,epoxy resin,and silicone rubber three-phase composites.Based on Newnhams series,parallel analysis,the theoretical model of the composite is derived,and the numerical calculations are conducted using Matlab.The effects of structural parameters of improved 1-3 piezoelectric composite on the thickness electromechanical coupling coefficient,equivalent density,and thickness frequency constant.The results show that when the volume fraction of ceramic-epoxy composite phase ranges from 0.2 to 0.5,and when the volume fraction of piezoelectric ceramics in ceramic-epoxy composite phase ranges from 0.6 to 0.7,the improved 1-3 piezoelectric composite has better performance parameters;The finite element simulation of composites are conducted using ANSYS software.The simulation results are compared with the theoretical calculation,and showed good consistency,verifying the accuracy of the theoretical model in evaluating material properties.