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A phenomenological approach to study the nonlinear magnetoelectric (ME) response of ME composites

机译:研究我复合材料的非线性磁电(ME)响应的现象学方法

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摘要

Magnetoelectric (ME) composites have recently attracted many researchers because of their significant applications in devices like sensors, energy harvesters etc. In this work, a unique phenomenological nonlinear constitutive model for ferromagnetic material has been developed and further, this model is extended to study the ME coupling coefficient of ME composites. The proposed model is based on metal plasticity approach for ferromagnetic material and is also thermodynamically consistent. A robust non-iterative scheme has been proposed and the developed model is incorporated into the computational scheme which renders computationally efficient simulations. In order to validate the proposed model, firstly, a press fit assembly of ME composite has been considered. The prestress developed due to the press fit is numerically evaluated using ABAQUS. The simulated results for the press fit configuration are compared with the experimental observations. To illustrate the generality of this model, a layered ME composite configuration has also been studied. Finally, a parametric study has been conducted and the influence of volume fraction of constituents, boundary conditions and the aspect ratio for the press fit ME composite assembly are reported.
机译:磁电(ME)复合材料最近吸引了许多研究人员,因为它们在这种工作中的装置,能量收割机等的设备中的重要应用,已经开发出了一种独特的现象学非线性本构模型,并进一步开发了用于研究的模型。我耦合ME复合材料的系数。该提出的模型基于用于铁磁性材料的金属塑性方法,也是热力学上一致的。已经提出了一种强大的非迭代方案,并将开发的模型纳入了计算方案,该计算方案呈现计算有效的模拟。为了验证所提出的模型,首先,已经考虑了ME复合材料的压配合组件。由于压力配合而开发的预应力是使用ABAQU进行数值评估的。将压配结构的模拟结果与实验观察进行比较。为了说明该模型的一般性,还研究了分层ME复合配置。最后,已经进行了参数研究,并报道了组分的体积分数,边界条件和压力机对应组件的纵横比的影响。

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