GMM/PZT/GMM层合材料的纵振磁电响应

层状复合结构层间胶层和复合材料的机械损耗是影响层状磁电复合材料磁电响应的重要因素.为了考虑层间胶层的作用,包括其纵向变形和剪切变形产生的效果,应用Hamilton原理建立层状复合结构的运动方程,并用复柔顺系数来反映材料的机械损耗特性.结合层状复合结构的边界条件和磁致伸缩/压电本构方程,就可以得到考虑了胶层作用和材料损耗时,复合结构的固有频率和磁电响应.对GMM(超磁致伸缩材料)/PZT(压电材料)/GMM结构的磁电响应进行了数值计算,将计算结果与实验结果进行了比较,证明考虑胶层作用并引入材料的损耗能够更准确预测复合材料的磁电换能特性.

Magnetoelectric Responses of GMM/PZT/GMM Laminate Composite in Longitudinal Vibration

The adhesive layers and the mechanical losses of materials in giant magnetostrictive material (GMM) and piezoelectric Pb(Zr,Ti)O3 (PZT) laminate composites are vital factors to impact final magneto-electric responses. The effects of the adhesive layer resulting from the shear and longitudinal deformation were considered in the governing motion equations of GMM/PZT/GMM composites, which were established based on Hamilton's principle. The coefficients in the motion equations were specified by the material parameters. To introduce the material losses into the analysis, the mechanical parameters including the compliances of magnetostrictive and piezoelectric materials were represented as complexes. Through the motion equations along with the boundary conditions and the constitutive equations of magnetostrictive/piezoelectric effects, the magnetoelectric responses over frequency and the natural frequencies were provided. The numerical calculations of the magnetoelectric responses in GMM/PZT/GMM laminate composite was presented. By comparing the theoretical magnetoelectric response with the experimental result,shows that the introduction of material losses can provide more acceptable prediction of the magnetoelectric performances.