铁电层状微结构材料的力电耦合场参数模拟

根据层状微结构材料的特性 ,给出层片电介质材料的力电边界条件 ;推导在外加力电载荷下 ,铁电单元体的力电响应关系以及其组成的各层材料的局部力电场 ,得到其解析解 ;计算不同铁电层体积分数和相对弹性模量情况下 ,对材料宏观载荷场的响应。随着铁电层体积分数的减小 ,电位移和应变响应的幅度都随着减小 ,而材料弹性模量的改变对材料的铁电性的影响相对较小 ,影响不显著

Simulation of Mechatronic Coupling Field in Ferroelectrics with Layered Micro Structure

According to characteristics of materials with layered micro-structure, the boundary conditions of electromechanical field in dielectric material is presented. The field response of units and local field of each related layers under applied loading are derivated. The influences of variant volume fraction and variant Yang's modular ratio on field response are studied. It is found that the magnitude of resulted electric displacement and strain decreases with decreased volume fraction of ferroelectric layer, while the influence of variant Yang's modular ratio on ferroelectric performance is relatively small.