取向磁场强度对磁流变弹性体力磁性能的影响

Effect of orientation magnetic field intensity on the magnetomechanical performance of magnetorheological elastomers

为探究制备过程中取向磁场对MRE力磁性能的影响,制备了相同磁敏颗粒夹杂的两种不同基体特性的MRE,分别对其微观组织和材料的力学性能进行了系统研究。结果表明:随着取向磁场与硅油含量的增大,磁敏颗粒在MRE中的链状排布更加明显;所制备材料的磁致剪切模量与磁流变效应均随着取向磁场的增大而增大,并且其增加趋势随着硅油含量的增加更加显著;磁流变弹性体的损耗因子随着取向磁场的增加逐渐增大,而当取向磁场高于250mT后,损耗因子几乎不变。相关结果可对磁流变弹性体的设计制备提供理论依据。

In order to investigate the influence of orientation magnetic field on the magnetomechanical properties of magnetorheological elastomers(MRE)during preparation,two types of magnetorheological elastomers with different matrix characteristics are prepared.The mechanical properties of the prepared samples have been systematically studied.The results show that with the increase of the orientation magnetic field and the content of silicone oil,the chain arrangement of the magnetically sensitive particles in the MRE becomes more obvious.The magnetic shear modulus and the magnetorheological effect of the prepared materials increase with the increase of the orientation magnetic field.It increases with the increase of the content of silicone oil,and its increasing trend becomes more significant.The loss factor of the magnetorheological elastomer gradually increases with the increase of the orientation magnetic field,and the loss factor is almost unchanged when the orientation magnetic field is higher than 250mT.The related results can provide a theoretical basis for the design and preparation of magnetorheological elastomers.