Study on movement mechanism of magnetic particles in silicone rubber-based magnetorheological elastomers with viscosity change
Study on movement mechanism of magnetic particles in silicone rubber-based magnetorheological elastomers with viscosity change
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DOI：
10.1016/j.jmmm.2019.165793
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发表时间：
2020-01-15
影响因子：
2.7
通讯作者：
Wang, Jun
中科院分区：
文献类型：
--
作者：
Xu, Zhiqiang;Wu, Heng;Wang, Jun
目前磁流变弹性体（MRE）的研究主要集中在固化后的力学性能。然而，对于磁性颗粒在固化过程中的粘度特性与运动机制之间的关系的研究却很少。针对上述问题，基于硅橡胶基MRE，结合外磁场下的粘度特性，研究了硫化过程中磁性颗粒的运动机理。首先，我们在不同的磁场条件下和不同的体积分数下制备了硅橡胶基 MRE。进一步，我们通过Stokes方程进行数值模拟，测试并应用了硅橡胶基MRE固化过程中的粘度变化规律，并建立了相应的力学理论模型。最后，我们成功地模拟了磁场条件和颗粒体积分数下磁性颗粒的运动状态，并通过修正梅森数公式，基于粘性力和磁力之间的关系讨论了这些颗粒的链形成机制。
Current studies on magnetorheological elastomers (MREs) are mainly focused on the mechanical properties after curing. However, very few studies have been conducted on the relationship between the viscosity characteristics and the movement mechanism of the magnetic particles during curing. Aimed at the problems above, the movement mechanism of magnetic particles combined with viscosity characteristics under external magnetic field is studied based on the silicone rubber-based MRE during the curing process. First, we prepared silicone rubber-based MREs under different magnetic field conditions and with different volume fractions. Further, we tested and applied the law of viscosity change during the curing of the silicone rubber-based MRE, via numerical simulation using the Stokes equation, and established the corresponding mechanical theory model. Finally, we successfully simulated the movement state of the magnetic particles for magnetic field conditions and particle volume fractions, and discussed the chain formation mechanism of these particles based on the relationship between the viscous and magnetic forces by correcting the Mason number formula.