铁电陶瓷宏细观本构模型

在居里温度以下，铁电陶瓷呈铁电相，具有许多取向不同的铁电畴，取向分布函数描述了铁电畴的取向分布情况文中推广了经典的内变量理论，采用宏细观相结合的方法，建立了铁电陶瓷的宏观行为与细观结构的关系，给出了铁电陶瓷的屈服条件，屈服面的演化规律及取向分布函数的演化规律计算得出了与实验比较符合的电位移－电场关系曲线及应变电场－蝶形关系曲线

A MACROSCOPIC-MICROSCOPIC CONSTITUTIVE MODEL FOR FERROELECTRIC CERAMICS 1)

Ferroelectric ceramics are an important class of modern engineering materials and have received increasing attention for their distinctive properties and applications For example, they are used as modulators, deflectors, optical memories imaging devices and so on With the wider use of the materials and harsher requirement of their performances, the study of coupling electric and mechanical behavior has attracted great interests The main effort of this paper is to obtain the constitutive relation of fe...