1-3-2型复合材料的面板应力放大作用研究  

Stress amplification effect of faceplate on 1-3-2 piezoelectric composite

作　　者：居伟骏[1] 李邓化[1] 贾美娟[1] 马永成[1] 

机构地区：[1]北京信息工程学院,北京100101

出　　处：《仪器仪表学报》2006年第z3期2490-2492,2503,共4页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金资助项目(60172008);北京市"拔尖创新人才选拔计划"资助项目

摘　　要：在1-3-2型压电复合材料上表面覆盖金属面板,不仅可以解决电极引出困难的问题,而且面板的应力放大作用可以提高复合材料的压电性能。本文利用有限元分析方法分析面板应力放大作用产生的原因,讨论面板的杨氏模量、泊松比和厚度对应力放大作用的影响。研究结果表明:选用较小杨氏模量,较大泊松比的金属材料作为面板能有效地提高1-3-2型压电复合材料的压电性能。对于不同材料的金属面板,其最佳厚度的选取范围是不同的,只有选择了适当的厚度,才能最大限度地发挥面板的应力放大作用。The influence of the faceplate's stress amplification effect upon the piezoelectric performance of the 1-3-2 piezoelectric composite was investigated. When the upper—surface of the 1-3-2 piezoelectric composite is covered with the metal faceplate, extraction electrodes become easier and the piezoelectric performance of the composite is improved for the stress amplification effect of the faceplate. The reasons for the stress amplification effect of the faceplate were analyzed using finite-element analysis. The influence of Young's modulus, Poisson's ratio and the thickness of the faceplate upon the stress amplification effect was involved. The results show that the better piezoelectric performance of the composite is obtained by using a low Young's modulus and high Poisson's ratio metal faceplate. And the optimal thickness of the faceplate is different as different materials of the metal plates concerned. To obtain the optimal stress amplification effect of faceplates, special attention should be placed on choosing plates with a right thickness.

关 键 词：面板 应力放大 1-3-2型压电复合材料 有限元分析 

分 类 号：TH7-55[机械工程—仪器科学与技术]