Torque-controllable device using a magnetorheological fluid with nano-sized iron particles for a haptic device

2017 ◽  
Author(s):  
Takehito Kikuchi ◽  
Isao Abe ◽  
Takaya Kumagae ◽  
Junichi Noma
Keyword(s):  
Magnetorheological Fluid ◽  
Haptic Device ◽  
Iron Particles

NANOSTRUCTURED AND SURFACE POLYMERIZED IRON PARTICLES FOR MAGNETORHEOLOGICAL FLUIDS

2007 ◽  
Vol 21 (28n29) ◽  
pp. 4819-4824 ◽  
Author(s):  
BEN HU ◽  
ALAN FUCHS ◽  
FARAMARZ GORDANINEJAD ◽  
CAHIT EVRENSEL
Keyword(s):  
Butyl Acrylate ◽  
Magnetorheological Fluid ◽  
Molar Ratio ◽  
Iron Particles ◽  
Scanning Calorimetry ◽  
Kissinger’S Method ◽  
Shear Yield ◽  
Coating Procedure ◽  
Dsc Method ◽  
Kinetics Of

A novel magnetorheological fluid, in which the surface of iron particles is coated with poly (butyl acrylate) by surface initiated atom transfer radical polymerization (ATRP), is investigated. The polymer coating procedure includes two steps, which are immobilization of initiator: 2-4(-chlorosulfonylphenyl)-ethytrichlorosilane (CTCS) on the iron particles surface and graft polymerization of butyl acrylate from the surface. The surface coating is characterized by FTIR and SEM. This magnetorheological fluid has controllable off-state viscosity and high shear yield stress. Coating polymer on the iron particles surface by ATRP can significantly reduce iron particles settling and improve stability of the MR fluid. Polymerization kinetics of bulk butyl acrylate are investigated using differential scanning calorimetry (DSC). Glass transition temperature is obtained using the step-scan DSC method. The molecular weight and conversion can be controlled by the molar ratio of monomer to initiator, reaction temperature and time. The reaction is first order determined by the plot of In ( M / M 0) against polymerization time. The overall activation energy is found to be 126kJ/mol by Kissinger's Method.

Response time of magnetorheological fluid–based haptic device

2015 ◽  
Vol 27 (7) ◽  
pp. 859-865 ◽  
Author(s):  
Takehito Kikuchi ◽  
Junichi Noma ◽  
Syuichi Akaiwa ◽  
Yuya Ueshima
Keyword(s):  
Response Time ◽  
Magnetorheological Fluid ◽  
Haptic Device

Preparation of Magnetorheological Fluid and Study on Its Rheological Properties

2014 ◽  
Vol 13 (02) ◽  
pp. 1450009 ◽  
Author(s):  
Shreedhar Kolekar
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Rheological Properties ◽  
Magnetorheological Fluid ◽  
Magnetic Flux Density ◽  
Iron Loading ◽  
Iron Particles ◽  
Mr Fluid ◽  
Carrier Fluid ◽  
System Type

The present paper focuses on preparation and process of the magnetorheological (MR) fluid whose carrier fluid is silicone-based oil and its additive is the commercial grease with different concentration of iron particles. General properties of MR fluid are discussed and rheological properties like shear rate, shear stress, viscosity of MR fluid can be found by using cone-and-plate sensor system-type rheometer. The result shows that shear stress as a function of magnetic flux density and viscosity does not strictly scale with iron loading.

Preparation and characterization of nano magnetic fluid for automotive applications

2019 ◽  
Vol 2 (95) ◽  
pp. 67-73
Author(s):  
J. Thanikachalam ◽  
P. Nagaraj ◽  
S. Karthikeyan
Keyword(s):  
Magnetic Fluid ◽  
Magnetorheological Fluid ◽  
Magnetorheological Fluids ◽  
Nano Particles ◽  
High Yield ◽  
Iron Particles ◽  
Sem Images ◽  
Smart Vehicles ◽  
Nickel Particles ◽  
Nano Additives

Purpose: of this paper is to prepare a nano magnetic fluids with nano additives to have the combined characteristics of high yield stress and better magnetic properties for smart vehicles. This study focuses on increasing the sedimentation time of the fluid using suitable nano additive nickel along with graphene as fillers. Design/methodology/approach: Magnetic nano sized nickel particle based electro- magneto-rheological fluid was prepared and graphene nanoparticle with thickness less than 10nm was introduced as an additive to reduce its sedimentation. This added plate like graphene acts as filler which seals the interfaces of nickel particles and thereby it improves the resistance to sedimentation. Triton X 100 was added as the surfactant for the fluid to reduce the agglomeration of the particles. Findings: Morphology of pure nickel and graphene were examined using scanning electron microscopy (SEM) images. Research limitations/implications: The important limitations is that freely dispersed micron sized iron particles could settle over a period of time, in the form of cakes at the bottommost, and it is tedious to recuperate as dispersed phase. In this investigation, nano sized nickel particles were used as additive to reduce the sedimentation of micron sized iron particles so that, the mixture is homogeneous for extended period of time. In future, addition of different types composite additives in the magnetorheological fluid could be made for the better sedimentation control. Practical implications: The sedimentation problem is one of the major drawback in the smart fluids, which can be eliminated by adding nano particles. For conventional fluid, the complete sedimentation will occur in 2 hours while the improved nano magnetic fluid with additive has good resistance to settle the micron sized iron particle up to 10 hours. Originality/value: To prepare a low cost magnetorheological fluid with nano additives like nickel particles along with fillers as graphene nano particles. With this addition of nickel and inclusion of graphene, the sedimentation problem in magnetorheological fluids is significantly reduced. This magnetorheological fluids can be used in brakes and dampers of automobiles.

Rheology of Aqueous Magnetorheological Fluid Using Dual Oxide-Coated Carbonyl Iron Particles

2011 ◽  
Vol 94 (8) ◽  
pp. 2386-2392 ◽  
Author(s):  
Chunlin Miao ◽  
Rui Shen ◽  
Mimi Wang ◽  
Shai N. Shafrir ◽  
Hong Yang ◽  
...  
Keyword(s):  
Carbonyl Iron ◽  
Magnetorheological Fluid ◽  
Iron Particles

scholarly journals Scissors-Type Haptic Device Using Magnetorheological Fluid Containing Iron Nanoparticles

Technologies ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 26 ◽  
Author(s):  
Mioto Waga ◽  
Yuuki Aita ◽  
Junichi Noma ◽  
Takehito Kikuchi ◽  
Yoshimune Nonomura
Keyword(s):  
Evaluation System ◽  
Mechanical Response ◽  
Magnetorheological Fluid ◽  
Tactile Display ◽  
Haptic Device ◽  
Mechanical Stimuli ◽  
Mr Fluid ◽  
Tactile Stimuli ◽  
Simulation Systems ◽  
Force Profiles

The mechanical ability and usefulness of simulation systems can be improved by combining a tactile display with a remote control or medical simulation systems. In this study, a scissors-type haptic device containing magnetorheological fluid (MR fluid) in its fulcrum is developed. We evaluate the mechanical response to the applied voltage and realize the presence of mechanical stimuli when a subject grasps or cuts the corresponding objects. When the magnetic field around the MR fluid is controlled by an electric voltage of 150–500 mV, the torque linearly increases from 0.007 ± 0.000 to 0.016 ± 0.000 N m. The device can provide tactile stimuli with 0.1 s of resolution. We also determined the voltage profiles based on typical force profiles obtained during grasping/cutting processes and evaluated the torque using a mechanical evaluation system. Features of the force profiles related to the soft and sticky feels were reconstructed well.

Trends in acoustic properties of iron particle seeded auxetic polyurethane foam

2004 ◽  
Vol 218 (2) ◽  
pp. 241-244 ◽  
Author(s):  
F Scarpa ◽  
W A Bullough ◽  
P Lumley
Keyword(s):  
Magnetic Fields ◽  
Iron Particle ◽  
Magnetorheological Fluid ◽  
Acoustic Properties ◽  
Absorption Characteristic ◽  
Frequency Bandwidth ◽  
Iron Particles ◽  
Constant Intensity ◽  
Acoustic Absorption Coefficient ◽  
Flexible Foam

The sound absorption characteristic of a clean, open-cell configuration, typical polyurethane flexible foam is shown against that of an auxetic foam made from it, and this same foam after it has been seeded with a magnetorheological fluid (then dried), having 2–5 μm carbonyl iron particles and subjected to zero, weak and concentrated magnetic fields in an acoustic impedance tube facility. The resultant foam indicates the capability of shifting the peak acoustic absorption coefficient within a given frequency bandwidth when constant intensity magnetic fields are applied.

Preparation and characterization of nano magnetic fluid for automotive applications

2019 ◽  
Vol 2 (96) ◽  
pp. 49-55
Author(s):  
J. Thanikachalam ◽  
P. Nagaraj ◽  
S. Karthikeyan
Keyword(s):  
Magnetic Fluid ◽  
Magnetorheological Fluid ◽  
Magnetorheological Fluids ◽  
Nano Particles ◽  
High Yield ◽  
Iron Particles ◽  
Sem Images ◽  
Smart Vehicles ◽  
Nickel Particles ◽  
Nano Additives

Purpose: of this paper is to prepare a nano magnetic fluids with nano additives to have the combined characteristics of high yield stress and better magnetic properties for smart vehicles. This study focuses on increasing the sedimentation time of the fluid using suitable nano additive nickel along with graphene as fillers. Design/methodology/approach: Magnetic nano sized nickel particle based electro- magneto-rheological fluid was prepared and graphene nanoparticle with thickness less than 10nm was introduced as an additive to reduce its sedimentation. This added plate like graphene acts as filler which seals the interfaces of nickel particles and thereby it improves the resistance to sedimentation. Triton X 100 was added as the surfactant for the fluid to reduce the agglomeration of the particles. Findings: Morphology of pure nickel and graphene were examined using scanning electron microscopy (SEM) images. Research limitations/implications: The important limitations is that freely dispersed micron sized iron particles could settle over a period of time, in the form of cakes at the bottommost, and it is tedious to recuperate as dispersed phase. In this investigation, nano sized nickel particles were used as additive to reduce the sedimentation of micron sized iron particles so that, the mixture is homogeneous for extended period of time. In future, addition of different types composite additives in the magnetorheological fluid could be made for the better sedimentation control. Practical implications: The sedimentation problem is one of the major drawback in the smart fluids, which can be eliminated by adding nano particles. For conventional fluid, the complete sedimentation will occur in 2 hours while the improved nano magnetic fluid with additive has good resistance to settle the micron sized iron particle up to 10 hours. Originality/value: To prepare a low cost magnetorheological fluid with nano additives like nickel particles along with fillers as graphene nano particles. With this addition of nickel and inclusion of graphene, the sedimentation problem in magnetorheological fluids is significantly reduced. This magnetorheological fluids can be used in brakes and dampers of automobiles.

Plate-like iron particles based bidisperse magnetorheological fluid

2013 ◽  
Vol 114 (21) ◽  
pp. 213904 ◽  
Author(s):  
Kruti Shah ◽  
Jong-Seok Oh ◽  
Seung-Bok Choi ◽  
R. V. Upadhyay
Keyword(s):  
Magnetorheological Fluid ◽  
Iron Particles
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