压电陶瓷晶体迟滞特性的本构关系研究  

Research on Hysteresis Constitutive Relation in Piezoceramic Crystals

作　　者：秦海辰[1] 尹周平[1] 

机构地区：[1]华中科技大学数字制造装备与技术国家重点实验室,武汉430074

出　　处：《中国机械工程》2014年第15期2059-2064,共6页China Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB724200);国家自然科学基金资助重点项目(51035002)

摘　　要：从能量的角度出发,运用本构方法,以热力学唯象理论为基础,通过对压电陶瓷晶体Helmholtz自由能关系进行推导而得出压电晶体的电场强度E与极化强度P的本构关系。与实验结果的对比分析表明,所推导的E-P本构关系能够较为准确地在宏观上描述压电陶瓷晶体的迟滞特性。最后结合实验数据和E-P迟滞曲线对压电陶瓷晶体的Helmholtz自由能和电滞回线进行了分析和讨论。Based on the thermodynamics phenomenological theory, a hysteresis constitutive relation of the electric field （E） and polarization （P） was deduced by analyzing the Helmholtz free energy relation of piezoceramic. The experimental hysteresis curve were compared with the academic calculation. The results presented in the hysteresis constitutive relation can describe accurately the hysteretic behavior on a macro-scale. Additionally, the Helmholtz free energy and hysteretic loop were discussed by analyzing experimental data and curves.

关 键 词：压电陶瓷 迟滞特性 本构关系 Helmholtz自由能 

分 类 号：TN384[电子电信—物理电子学] TH140.7[一般工业技术—材料科学与工程]