Investigation of the well-dispersed magnetorheological oil-based suspension with superparamagnetic nanoparticles using modified split Hopkinson pressure bar

Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristics change under the magnetic field. They are widely applied for dynamic energy dissipation due to their rapid thickening under the external magnetic field. In this work, the core–shell suspension of supe...

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Bibliographic Details
Published in:Rheologica acta 2022-02, Vol.61 (2), p.111-122
Main Authors: Osial, Magdalena, Nowicki, Michał, Klejman, Ewa, Frąś, Leszek
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Complex Fluids and Microfluidics
Compression tests
Dispersion
Energy dissipation
Food Science
Iron oxides
Magnetic fields
Magnetorheological fluids
Materials Science
Mechanical Engineering
Nanoparticles
Original Contribution
Polymer Sciences
Smart materials
Soft and Granular Matter
Split Hopkinson pressure bars
Thickening
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Summary:Magnetorheological (MR) fluids are classified as smart materials whose viscoplastic characteristics change under the magnetic field. They are widely applied for dynamic energy dissipation due to their rapid thickening under the external magnetic field. In this work, the core–shell suspension of superparamagnetic iron oxide-based nanoparticles was synthesized and dispersed in silicone oil. Much effort has been made to prepare suspension meeting requirements of MR fluid. The experimental squeezing flow response was studied using a modified split Hopkinson pressure bar (SHPB) with various shear rates. Tests with modified SHPB show that MR fluid rapidly responds to the compression thickening and forming chain-like structures. MR fluid dissipates the energy generated during compression stress tests. This study presents a simple and cost-effective synthesis way suitable for MR fluid formation for its dynamic energy dissipation application.
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-021-01318-9