Equivalent circuit method for static and dynamic analysis of magnetoelectric laminated composites
Equivalent circuit method for static and dynamic analysis of magnetoelectric laminated composites
复制标题
磁电层状复合材料静动态分析的等效电路法
DOI：
10.1007/s11434-008-0304-7
复制
发表时间：
2008-07-01
影响因子：
--
通讯作者：
Zhai JunYi
中科院分区：
文献类型：
--
作者：
Dong ShuXiang;Zhai JunYi
给出了磁致伸缩Terfenol-D(TbxDy1-xFe2)和压电PZT(PZT)复合材料在纵向磁化和横向极化(或L-T)和横向磁化和横向极化(或T-T)模式下工作的磁电等效电路分析方法。研究了低频和共振频率下的磁电耦合，我们的分析预测：(1)L-T和T-T模的磁电电压系数都随着压电相厚度的增加而增大，而磁致伸缩相厚度保持不变，当压电相和磁相的厚度比为3时，磁电耦合趋于饱和；(2)存在使两种模式的磁电(ME)电压系数最大的最佳厚度比，这取决于压电相和磁致伸缩相的弹性柔度比；并且(Iii)当工作在谐振频率时，ME电压系数显著地增加了与Q(M)相似的系数。制备了一系列Terfenol-D/PZT层合板，并与理论计算结果进行了比较。实验证明，等效电路法是进行ME层合板优化设计的有效工具。
Magnetoelectric equivalent circuit analytical method is presented for laminate composites of magnetostrictive Terfenol-D (TbxDy1-xFe2) and piezoelectric Pb(Zr1-xTix)O-3 (PZT) operated in longitudinal magnetized and transverse polarized (or L-T), and transverse magnetized and transverse polarized (or T-T) modes. Magnetoelectric (ME) couplings both at low-frequency and resonance-frequency have been studied, and our analysis predicts that (i) the ME voltage coefficients of both L-T and T-T modes increase with increasing the thickness of the piezoelectric phase whereas magnetostrictive phase thickness keeps constant, and then tend to saturation when the thickness ratio of piezoelectric phase to magnetic phases is >3; (ii) there are the optimum thickness ratios that maximize magnetoelectric (ME) voltage coefficients for the two modes, which are dependent on elastic compliances ratio of piezoelectric phase and magnetostrictive phase; and (iii) the ME voltage coefficients are dramatically increased by a factor of similar to Q(m), when operated at resonance frequency. A series of Terfenol-D/PZT laminates were fabricated, and the results were compared with the theoretical ones. Experiments confirmed that equivalent circuit method is a useful tool for optimum designs of ME laminates.