Field-induced static and dynamic yield stresses are explored for magnetorheological (MR) suspensions in an aging, yield stress matrix fluid composed of an aqueous dispersion of Laponite clay. Using a custom-built magnetorheometry fixture, the MR response is studied for magnetic field strengths up to 1 T and magnetic particle concentrations up to 30 v%. The yield stress of the matrix fluid, whic...

The study aims at the design of nanostructured hybrid materials that are both conducting and magnetic. Conducting polypyrrole nanotubes were prepared by oxidation pyrrole with iron(III) chlo...

In order to obtain well-proportioned surface quality and high polishing efficiency of free-form mould, a robotic gasbag polishing technique using an improved spinning-inflated-gasbag polishing tool is proposed in this paper. The improved polishing tool consists of three detachable modules, which are the drive, soft rubber gasbag and magnetorheology. The six degrees of freedom industrial robot w...

SYNOPSIS This paper reports the first predictions of the yield stress of suspensions of non-Brownian magnetic fibers in the presence of uniform magnetic fields. The quasi-static regime of the shear deformation (before the flow onset) of the suspension is studied. Four different structures of the magnetic fiber suspensions are considered – column, zigzag, 3D stochastic and near-planar stochastic...