水泥基压电机敏复合材料的逆压电效应

Converse Piezoelectric Effect of 2-2 Piezoelectric Cement Matrix Composite

介绍了 2 - 2型水泥基压电机敏复合材料的逆压电效应 ,即驱动性能的研究结果 .在实验中观测到 2 - 2型水泥基压电机敏复合材料具有令人满意的逆压电效应 .实验分为两部分 ,在第一部分研究了该材料在自由状态下的逆压电效应 .实验发现在自由状态下 2 - 2型水泥基压电机敏复合材料的驱动输出的幅值随频率线性增加 ,而驱动输出的相角随频率线性降低 .第二部分实验称为预压实验 ,研究样品在受压条件下的驱动性能 .预压实验用于模拟机敏材料在结构中的真实使用环境 ,实验中使用数字式自动伺服试验机 (MTS)实施对样品的预压 .实验发现在预压条件下的驱动性能与自由状态有明显的区别 ,在预压状态下 ,材料的驱动性能受到结构系统其它因素的影响 。

In the paper the experimental results of the converse piezoelectric effect(CPE) of the 2-2 piezoelectric cement matrix composite are presented.Desirable CPE was observed in the composite.The experiment on CPE was divided into two parts.In the first part CPE of the composite under free condition was studied.It was found that the amplitude of response increases,but the phase angle of the response decreases,both almost linearly with the frequency in CPE.The second part of the experiment was called pre-compression test,which was focused on CPE of this kind of smart material in a structure.Distinct difference was observed on CPE of the composite under free condition and in a structure system(simulated by the pre-compression in the frame of an MTS machine).Obviously CPE of the actuator in a structure is influenced by factors including the properties of other components of the structure and the interaction between the actuator and other components,which was represented by the pre-compression level in the experiment.