Performance Analysis And Simulation Software Development Of 1-3 Piezocomposite

In the field of ultrasonic, piezoelectric ultrasonic transducer is the most important device. As the most important part of piezoelectric ultrasonic transducer, piezocomposite plays a decisive role in the innovation development of the piezoelectric ultrasonic transducer. The 1-3 piezocomposite has become the ideal material of piezoelectric ultrasonic transducer, since it has many advantages such as low acoustic impedance, small dielectric constant, high electromechanical coupling coefficient and so on. The performance of the 1-3 piezocomposite that consists of two-phase material is influenced by many factors, so it is necessary to study the impacts of various factors on the performance of the 1-3 piezocomposite.This paper begins with the introduction of the application background and concept of the 1-3 piezocomposite and the statement of advantages of this material in preparation method, process and performance. Two theoretical models are summarized by studying the present development situation of the 1-3 piezocomposite home and abroad, and the advantages and disadvantages of the two models are analyzed.Chapter followed is the introduction of commonly used piezoelectric materials, the piezoelectric constitutive equation and the 1-3 piezocomposite theory. Based on the uniform field theory, the series-parallel structure model and the piezoelectric constitutive equation, the theoretical model of 1-3 piezocomposite is established and the calculation formula of equivalent performance parameters is deduced. Furthermore the finite element discretization equation of piezoelectric elastomer is also established. Based on the equation, the finite element simulation model of 1-3 piezoelectric composite is established by ANSYS.Then, based on the 1-3 piezocomposites equivalent model and the finite element model, the simulation software with MATLAB and ANSYS as the kernel software is developed by using MATLAB GUI platform. Interface issues between the simulation software and the kernel software are researched. Simulation of the 1-3 piezocomposite is implemented by using the simulation software, and comparison between results of the two models aforementioned is also made.Eventually, simulation study of the 1-3 piozecomposite is made by using the simulation software, and impacts volume fractions of piezoceramic on the dielectric constant, the specific acoustic impedance, the longitudinal wave velocity and the electromechanical coupling coefficient are analyzed by using the simulation results. Furthermore impacts of composite aspect(thickness/width) on the modal, the surface displacement, the resonance frequency, the anti-resonance frequency, and the electromechanical coupling coefficient are also analyzed.Through the analysis, the fact that piezoelectric phase volume fraction and composite aspect are the main factors which impact the performance of the 1-3 piozecomposite is found. The analysis results can provide the application of the 1-3 piozecomposite with theoretical guidances.