Abstract This work reports an investigation into the redispersibility of magnetorheological suspensions (MR suspensions) by testing the rheological properties of suspension sediment. By using a new freeze-sampling method, slices of sediment were taken from the bottom of the container with little changes on shear history which makes it possible to employ rheological measurement. Size distribution of particles contained in sediment was studied by a laser scattering method. Oscillatory and steady shear was employed to studying the rheological viscoelastic and flow behavior. Also, thixotropy and recovery behavior was also studied. The results obtained proved that redispersibility is a multifactor-dependent property which can be reflected from rheological responses of MR suspensions’ sediment. Hydrodynamic force and particle interaction which have significant influence on those properties were analyzed in this study. In addition, indexes correspond to different rheological properties were put forward to make a comparison quantitatively between traditional MR suspensions.

中文翻译：

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磁流变悬浮液沉积物的流变响应及其对再分散性的影响

摘要 这项工作报告了通过测试悬浮沉积物的流变特性来研究磁流变悬浮液（MR 悬浮液）的再分散性。通过使用新的冷冻取样方法，从容器底部取出沉积物切片，剪切历史几乎没有变化，这使得采用流变学测量成为可能。采用激光散射法研究沉积物中颗粒的粒径分布。采用振荡和稳定剪切来研究流变粘弹性和流动行为。此外，还研究了触变性和恢复行为。获得的结果证明，再分散性是一个多因素依赖的特性，可以从 MR 悬浮液沉积物的流变响应中反映出来。本研究分析了对这些特性有显着影响的水动力和粒子相互作用。此外，提出了不同流变性能对应的指标，对传统MR悬浮液进行定量比较。