新型稳定磁流变体材料——磁胶的性能实验研究

Performance test study on a new type of magnetorheological material-magnetic colloid

通过实验的方法,研究了新型稳定型磁流变体材料磁胶的零场沉降稳定性;服役状态下磁胶器件的扭矩输出稳定性、磁化和退磁性能、器件工作的热稳定性、流变性能.实验结果表明,磁胶在零场状态和服役状态下的各项性能均优于目前使用的磁粉、磁流变液磁性功能材料.在Bingham模型的基础上,通过理论分析,导出磁胶在服役状态下的剪应力本构方程,为磁胶及其器件的后续研究提供了理论基础.

A new type of stable magnetorheological material namely magnetic colloid is presented for application in mechanical transmissions mechanisms.To investigate the magnetic colloid＇s performance characteristics including zero-field stability,torque output stability,magnetization and demagnetization performance,thermal stability and rheological properties,the experiments were designed and employed in this paper.Meanwhile,by theoretical analysis,an improved shear stress constitutive equation of the magnetic colloid under the state of service is derived based on the Bingham model.The experimental results indicate that the performance characteristics of the magnetic colloid are superior to current magnetic particles and magnetorheological fluids under the condition of zero-field and service state.The results of this work provide theoretical basis for the future research on magnetic colloid.