Encapsulations of Magnetorheological Fluids Within 3-D Printed Elastomeric Cellular Structures

In this study, magnetorheological fluid (MRF) was successfully encapsulated in a 3-D printed elastomeric cellular structure. To this end, an MRF, which was composed of (40% volume fraction) carbonyl iron particles (6- 10~\mu \text{m} in diameter) suspended in silicone oil, was encapsulated in a the...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2022-08, Vol.58 (8), p.1-5
Main Authors: Park, Jungjin, Choi, Young T., Flatau, Alison B., Wereley, Norman M.
Format: Article
Language:English
Subjects:
Additive manufacturing (AM)
Carbonyls
Cellular structure
Circular cylinders
Damping
Diameters
elastomeric composite
Encapsulation
Excitation
Magnetic field measurement
Magnetic fields
Magnetic hysteresis
Magnetic liquids
Magnetic properties
Magnetism
magnetorheological fluid (MRF)
Magnetorheological fluids
Mechanical properties
Mechanical tests
Performance indices
Polyurethane resins
Shape
Stiffness
thermoplastic polyurethane (TPU)
Three dimensional composites
Three dimensional printing
Three-dimensional displays
Urethane thermoplastic elastomers
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Summary:In this study, magnetorheological fluid (MRF) was successfully encapsulated in a 3-D printed elastomeric cellular structure. To this end, an MRF, which was composed of (40% volume fraction) carbonyl iron particles (6- 10~\mu \text{m} in diameter) suspended in silicone oil, was encapsulated in a thermoplastic polyurethane (TPU) elastomeric cellular structure. A 3-D printer was used to print a TPU elastomer with a rectangular cellular structure in the shape of a circular cylinder. The MRF was injected into the rectangular voids within the TPU cellular structure (hereinafter MRF-TPU elastomeric composite), and then sealed into the composite by 3-D printing a capping or sealing layer on top. The mechanical stiffness and damping properties of the MRF-TPU elastomeric composite with respect to external magnetic fields (0, 2, and 7 kG) and excitation frequencies (1, 5, and 10 Hz) were measured via uniaxial dynamic mechanical testing. Also, the effects of excitation and prestrain amplitude on the mechanical properties of the MRF-TPU elastomeric composite were investigated in these experiments. The complex stiffness and dissipated energy measured via dynamic mechanical testing were used as the performance index.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2021.3137838