Title :
Micro-chain model of Magnetorheological fluids between two parallel disks
Author :
Jin Huang ; Yan Yang
Author_Institution :
Coll. of Mech. Eng., Chongqing Univ. of Technol., Chongqing, China
Abstract :
Digital holographic microscopy is presented in this study, which can measure the Magnetorheological fluids (MRF) in different volume percentage of particles and different magnetic field strengths. Based on the chain structure of magnetic particle under applied magnetic field, the relationships between shear yield stress, magnetic field, size and volume percentage of MRF in two parallel planes can be established. It has important theoretical significance for the design of optimized parameters and the manufacture of MRF. The results show the yield stress is directly proportional to the volume fraction and the magnetization of particles in the MRF. The theoretical model for yield stress of MRF is established and the variation tendency of shear strength in MRF with different material composition can be predicted by this theoretical model.
Keywords :
discs (structures); magnetic particles; magnetohydrodynamics; magnetorheology; optical microscopy; shear strength; yield stress; MRF manufacture; chain structure; digital holographic microscopy; magnetic field strengths; magnetic particle; magnetorheological fluids; material composition; microchain model; optimized parameters; parallel disks; parallel planes; particle magnetization; shear strength; shear yield stress; theoretical model; volume fraction; volume percentage; Fluids; Magnetic fields; Magnetic liquids; Magnetic particles; Magnetomechanical effects; Saturation magnetization; Stress; Magnetorheological fluids; chain model; micro digital holography; shear strength;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems (NEMS), 2013 8th IEEE International Conference on
Conference_Location :
Suzhou
Electronic_ISBN :
978-1-4673-6351-8
DOI :
10.1109/NEMS.2013.6559952
