非均匀多铁性杆的磁电耦合效应
首发时间:2010-01-11
摘要:多铁性杆横截面的不均匀性会影响其磁电耦合效应和其它性能。本文基于多铁性材料梁结构的轴向运动的一维简化理论,建立了非均匀杆在纯拉伸模式下的控制方程,并采用状态空间法对磁电耦合效应进行了分析。针对不同截面参数和边界条件给出了数值算例,结果表明在同等条件下,非均匀杆的磁电效应有可能大于均匀杆,这为设计具有更大磁电耦合效应的多铁性器件结构提供了理论指导。
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Effect of Non-uniformity on Magnetoelectric Coupling in Multiferroic Bars
Abstract:We analyze the magnetoelectric effect of non-uniform multiferroic composite nanofibers composed of both piezoelectric and piezomagnetic phases. The non-uniformity could be induced by the manufacturing error and may have an influence on the magnetoelectric effect. The governing equation is formulated based on the zero-order beam theory, and the state space method is used to compute the magnetoelectric coefficient. Numerical examples are presented for a non-uniform composite nanofiber with different non-uniformity parameters and boundary conditions. The results show that the non-uniformity of the cross-section may increase the magnetoelectric effect, and thus provides a simple and also attracting way for the design of high-performance magnetoelectric structures.
Keywords: Multiferroic composite Magnetoelectric effect Non-uniform bar
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No.3874450982712631****
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