The static yield stress of ferrofluid-based magnetorheological suspensions
The Ferrofluid-based magnetorheological suspensions (F-MRS) have been newly developed, in which ferrofluids were used as the carrier media, and microsized iron particles as the magnetic material. The advantageous properties of the F-MRS were presented by comparing with commercial mineral oil based MR suspension (M-MRS). Furthermore, the static yield stresses τsy of four F-MRS samples were measured in fixed shear rate method and step-increased strain method. The different behaviors under the two methods were analyzed. And finally the dependence of the static yield stress on the magnetic induction B and the sample weight fractions φ were summarized.