Characteristic analysis of magnetorheological fluid based on different carriers

Abstract

In order to prepare special MRFs to satisfy the demands of tracked vehicle, two different carrier fluids were used to prepare MRFs. Preparation of MRF, which are based on carrier of special shock absorption fluid and 45# transformer oil, was finished. And characteristics of these samples were tested and analyzed. The results show that Tween-80 and Span-80 can improve the sedimentary stability, and the larger mass fraction can also increase the sedimentary stability. Using 45# transformer oil instead of special shock absorption fluid as a carrier of MRF, the shear yield stress remains nearly constant but the viscosity and the sedimentary stability are reduced. The MRF with diameter of 2.73 μm shows better sedimentary stability than that of the MRF with diameter of 2.30 μm, or 4.02 μm. Stearic acid obviously improves sedimentary stability and off-state viscosity, but has no function on the shear yield stress. In magnetic field of 237 kA/m, the shear yield stress of MRF based on special shock absorption fluid is 18.34 kPa and the shear yield stress of MRF based on 45# transformer oil is 14.26 kPa.

Keywords

magnetorheological fluid / 45^# transformer oil / shear yield stress / off-state viscosity / sedimentary stability

References

[1] JollyM. R., BenderJ. W., CarlonJ. D.. Properties and applications of commercial magnetorheological fluids [J]. Journal of Intelligent Material Systems and Structures, 1999, 10(1): 5-13

[2] CARLSON J D, CHRZAN M J, RALEIGH N C, GIRARD F J. Magnetorheological fluid devices: US, 5284330 [P]. 1994-02-08.

[3] CaoZ., JiangW.-q., YeX.-z., GongX.-long.. Preparation of superparamagnetic Fe3O4/PMMA nano composites andtheir magnetorheological characteristics [J]. Journal of Magnetism and Magnetic Materials, 2008, 320: 1499-1502

[4] ViotaJ. L., VicenteJ. D., DuranJ. D. G., DelgadoA. V.. Stabilization of magnetorheological suspensions by polycyclic acid polymers [J]. Colloid and Interface Science, 2005, 284: 527-541

[5] IsmoV.. MR fluid-based damping force control for vehicle cabin vibration suppression [C]. ISMO V. Smart Materials and Structures VTT Research Program 2000–2002, 2002, Espoo, Finland, VTT Technical Research Center of Finland: 51-66

[6] GordaninejadF., KelsoS. P.. Fail-safe magneto-rheological fluid dampers for off-highway, high-payload vehicles [J]. Journal of Intelligent Material System and Structures, 2000, 11(5): 395-406

[7] YangG., SpencerB. F., CarlsonJ. D.. Large-scale MR fluid damper: Modeling and dynamic performance considerations [J]. Engineering Structures, 2002, 24: 309-323

[8] FernandoD. G., CarlsonJ. D.. Investigating the time dependence of the MR effect [C]. GORDANINEJAD F. Proceeding of the 10th International Conference on ER Fluids, MR Suspensions, 2006, Lake Tahoe, USA, World Scientific: 165-171

[9] ParkJ. H., ChinB. D., ParkO. O.. Rheological properties and stabilization of magnetorheological fluids in a water-in-oil emulsion [J]. Journal of Colloid and Interface Science, 2001, 240: 349-354

[10] JunJ., UhmS., RyuJ., SuhK.. Synthesis and characterization of monodisperse magnetic composite particles for magnetorheological fluid materials [J]. Colloids and Surfaces A: Physicochem Eng Aspects, 2005, 260: 157-164

[11] FuchsA., XinM., GordaninejadF., WangX., HitchcockG. H., GecolH., EvrenselC., KorolG.. Development and characterization of hydrocarbon polyol polyurethane and silicone magnetorheological polymeric gels [J]. Journal of Applied Polymer Science, 2004, 92: 1176-1182