Open AccessMagnetic field effects on shear and normal stresses in magnetorheological finishing
Author(s) -
John C. Lambropoulos,
Chunlin Miao,
Stephen D. Jacobs
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.019713
Subject(s) - magnetorheological fluid , materials science , magnetic field , ribbon , borosilicate glass , shear (geology) , magnetic particle inspection , composite material , optics , magnetic nanoparticles , mechanics , physics , nanotechnology , nanoparticle , quantum mechanics
We use a recent experimental technique to measure in situ shear and normal stresses during magnetorheological finishing (MRF) of a borosilicate glass over a range of magnetic fields. At low fields shear stresses increase with magnetic field, but become field-independent at higher magnetic fields. Micromechanical models of formation of magnetic particle chains suggest a complex behavior of magnetorheological (MR) fluids that combines fluid- and solid-like responses. We discuss the hypothesis that, at higher fields, slip occurs between magnetic particle chains and the immersed glass part, while the normal stress is governed by the MRF ribbon elasticity.