Magnetic particle chains embedded in elastic polymer matrix under pure transverse shear and energy conversion
Magnetic particle chains embedded in elastic polymer matrix under pure transverse shear and energy conversion
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DOI：
10.1016/j.jmmm.2019.02.078
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发表时间：
2019-07-01
影响因子：
2.7
通讯作者：
Cavaille, Jean-Yves
中科院分区：
文献类型：
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作者：
Diguet, Gildas;Sebald, Gael;Cavaille, Jean-Yves
在纯剪切条件下，研究了一种由磁性颗粒填充的软基体结构磁流变弹性体的能量收集模型。假设颗粒在施加磁场的链中沿着排列，并考虑在垂直于链的平面中施加的剪切应变。当施加应变并且假设变形是均匀的并且颗粒保持对准时，它们的对准轴和颗粒之间的间距都改变，从而影响它们的磁性状态。这项工作的目的是评估多远的磁感应强度变化引起的机械招标可以转换为电信号。我们首先分析了链中颗粒的磁化率，然后推导出复合磁导率作为剪切应变的函数的解析表达式。还进行了考虑颗粒磁饱和的FEM模拟以估计最佳条件（磁场值、剪切振幅等）。最大化能量转换潜力。
A model of structured Magneto-rheological Elastomer made of a soft matrix filled by magnetic particles was studied for energy harvesting, in pure shear condition. The particles were supposed to be aligned in a chain along which the magnetic field is applied and considering a shear strain applied in a plane perpendicularly to the chain. As the strain is applied and assuming the deformation is homogeneous and the particles remain aligned, both of the axis of their alignment and inter-distance between particles change, affecting their magnetic state. The aim of this work is to evaluate how far the magnetic induction variation induced by mechanical solicitation can be converted into electric signal. We firstly analyzed the magnetic susceptibility of a particle in the chain, and then derived an analytical expression for the composite permeability as a function of shear strain. FEM simulations taking into account the particle magnetic saturation was also performed to estimate the optimal conditions (magnetic field values, shear amplitude, etc.) maximizing the energy conversion potentials.