The nanosized magnetite particles were synthesized by means of a coprecipitation method and used to prepare the aqueous ferrofluids with various volume fractions. The magnetorheological properties of the aqueous ferrofluids have been investigated as a function of magnetic field. Under steady-state shear, the apparent viscosity for all of the ferrofluids exhibited a shear thinning behavior. But ...

Magnetorheo]ogical (MR) fluids are colloidal suspensions of pammagnetic particles in a non-magnetic fluid. These fluids, along with their electrical analogues, electrorheologica] (ER) fluids, have been proposed as controllable fluids, for use in electromechanical devices such as dampers, clutches and brakes. [1] When exposed to an external magnetic field, the particles acquire dipole moments ag...

Abstract The gradual increase in the volume of electric vehicles leads engineers to solve completely new problems NVH (noise, vibration and harshness) One solutions is use rubber mounts hold motor vehicle’s powertrain. This article deals with a mount used insulate vibrations from propulsion system rest vehicle. Since produces different spectrum noise than internal combustion engine (it lower am...

A two-fluid continuum model is developed to describe mass transport in electro- and magnetorheological suspensions. The particle flux is related to the field-induced stresses. Solutions of the resulting mass balance show column formation in the absence of flow, and stripe formation when a suspension is subjected simultaneously to an applied electric field and shear flow.

The demonstration involves a new haptic interface based on a wide-bandwidth electromagnetic valve and a pair of chambers filled with a magnetorheological fluid. It is intended to reproduce, with highfidelity, properties of complex materials that are experienced through pressing and squeezing actions, at the detriment of shape.

The rheological and magnetic properties of several commercial magnetorheological (MR) fluids are presented and discussed. These fluids are compared using appropriate figures of merit based on conventional design paradigms. Some contemporary applications of MR fluids are discussed. These applications illustrate how various material properties may be balanced to provide optimal performance.