The modeling of magnetomechanical sensors in laminated structures
The modeling of magnetomechanical sensors in laminated structures
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DOI：
10.1088/0964-1726/17/2/025010
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发表时间：
2008-04
影响因子：
4.1
通讯作者：
S. Datta;J. Atulasimha;C. Mudivarthi;A. Flatau
中科院分区：
文献类型：
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作者：
S. Datta;J. Atulasimha;C. Mudivarthi;A. Flatau
建立了一种非线性磁力学板模型，用于预测在准静态机械应力和磁场同时作用下，具有磁致伸缩层和非磁性层的层合结构的磁感应强度、弹性应变和磁致伸缩应变以及机械应力。该模型是将经典层合板理论与基于能量的统计磁力模型相结合而得到的。该模型用于研究具有磁致伸缩铁镓（Galfenol）贴片附着在非磁性铝衬底上的单晶结构。得到了贴片对作用在均匀片上的面内轴向力、剪切力以及弯矩和扭矩的传感响应。研究了直流偏置磁场和贴片厚度与衬底厚度之比对传感器性能的影响。结果表明，该模型能较好地捕捉磁力过程中的非线性和不同结构耦合。
A non-linear magnetomechanical plate model has been developed to predict the magnetic induction, elastic and magnetostrictive strain and mechanical stress in a laminated structure with magnetostrictive and non-magnetic layers under the simultaneous effect of quasi-static mechanical stress and the magnetic field. This model was obtained by coupling classical laminated plate theory to an energy-based statistical magnetomechanical model. The model was used to study a unimorph structure having a magnetostrictive iron–gallium (Galfenol) patch attached to a non-magnetic aluminum substrate. The sensing responses from the patch were obtained for in-plane axial and shear forces as well as bending and twisting moments acting on the unimorph. The effect of the DC bias magnetic field and the ratio of patch thickness to substrate thickness on the sensor performance was studied. The results demonstrate that the model can capture the non-linearity in the magnetomechanical process and the different structural couplings.