基于磁流变弹性体导电机理静态压敏特性分析

Analysis of Static Pressure Sensitive Characteristics of Magnetorheological Elastormer Based on Its Conductive Mechanism

磁流变弹性体是一种新型磁流变材料,由于其内部颗粒结构的特殊性,颗粒体积比非常低的磁流变弹性体能表现出良好的导电性,通过对磁流变弹性体导电机理的研究,并基于颗粒在外加载荷作用下的弹性变形理论,分析了颗粒间电流导路面积的变化,进而推导出磁流变弹性体电导压敏特性理论关系。通过对实验测试结果的处理与分析,得到磁流变弹性体在外加压力作用下通过样品的电流和施加在样品上的电压呈非线性关系,在相同的电压下,流经磁流变弹性体的电流随压力的变化而变化,表现出明显的压敏特性行为。

As a new type of magnetorheological materials with low particle volume ratio,magnetorheological elastormers （MREs） have good conductivity due to the particlarity of its internal particle structure.The pressure-sensitive conductivity of MREs was derived by studying the conductive mechanism of MREs and analyzing the area of conductive path based on elastic deformation of particles under external load.Experimental results show that the flowing current and voltage of the samples are nonlinear relationship under the action of external pressures,while the current flowing through the MREs changes with the change of pressures under the same voltage,displaying obvious pressure-sensitive behaviors.