Design and experimental characterization of a twin-tube MR damper for a passenger van

Desai, Rangaraj Madhavrao; Jamadar, Mohibb e Hussain; Kumar, Hemantha; Joladarashi, Sharnappa; Sekaran, Sreetharan

doi:10.1007/s40430-019-1833-5

Cited by 28 publications

(14 citation statements)

References 28 publications

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“…As a part of the previous work, 19 a twin-tube MR damper was designed based on the experimental results of characterizing a passive damper used in a passenger van. This MR damper consisting of an electromagnetic coil in the piston was fabricated at the industrial collaborator M/s Rambal Ltd, Chennai, India.…”

Section: Methodsmentioning

confidence: 99%

“…A twin-tube-type MR damper operating in the valve mode was designed and prototype was fabricated as detailed in the authors' previous technical paper. 19 An automotive passive damper was experimentally characterized in the damper testing machine to arrive at the forces that the MR damper is required to generate at the specified damper velocities. The design parameters of the MR damper are given in Table 4.…”

Section: Design and Fabrication Of Mr Dampermentioning

confidence: 99%

“…For various currents given to the MR damper, the value of the average strength of the magnetic field H in the active region of the fluid flow gap is found from the FEMM 24 model of the MR damper piston. The results of the FEMM program have been validated in the authors’ previous work, 19 wherein an analytical method using electromagnetic circuit theory is employed. The magnetic flux density at the fluid flow gap was calculated based on the geometrical and material properties of the MR damper piston assembly.…”

Section: Mr Damper Modeling Based On Mr Fluid Rheology and Mr Damper mentioning

confidence: 99%

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Synthesis of magnetorheological fluid and its application in a twin-tube valve mode automotive damper

Desai

Acharya

Jamadar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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The change in rheological properties of smart materials like magnetorheological fluid when brought under the influence of a magnetic field can be utilized to develop magnetorheological devices where the output has to be continuously and quickly varied using electronic control interface. In the present study, magnetorheological fluid is synthesized and used as a smart fluid in a twin-tube magnetorheological damper operating in valve mode. The behavior of the magnetorheological fluid is experimentally characterized in a rheometer and mathematically modeled using Herschel–Bulkley model. The parameters of the Herschel–Bulkley model are expressed as polynomial functions of strength of the magnetic field in order to find the shear stress developed by the magnetorheological fluid at any given strength of the magnetic field applied. The magnetorheological damper, which was designed for application in a passenger van, is tested in the damper testing machine. The performance of the damper at different damper velocities and current supplied is studied. The range of values for the parameters of the experimental testing are chosen to emulate the actual conditions of operation in its intended application. Nondimensional analysis is performed, which links magnetorheological fluid rheological properties and geometrical parameters of magnetorheological damper design with the force developed by the damper. Finite element method magnetics is used to find the strength of the magnetic field at the fluid flow gap. Analytical methods are used to calculate the damper force developed due to the field-dependent yield stress and compared with experimental force values. The resulting dynamic range of the magnetorheological damper is also assessed.

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Section: Methodsmentioning

confidence: 99%

Section: Design and Fabrication Of Mr Dampermentioning

confidence: 99%

Section: Mr Damper Modeling Based On Mr Fluid Rheology and Mr Damper mentioning

confidence: 99%

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Synthesis of magnetorheological fluid and its application in a twin-tube valve mode automotive damper

Desai

Acharya

Jamadar

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…An iron-cobalt-vanadium alloy, known as ''Vacoflux-50'', produced by Vacuumschmelze GmbH (2018a, 2018b) in Germany, was used in the current design. This material is shown to have a very high magnetic permeability compared to most carbon steel alloys which are the common magnetic materials used with MR dampers (Desai et al, 2019;Heo and Joonryong, 2014;Li et al, 2019;Macha´cˇek, 2019;Manjeet and Sujatha, 2019;Strecker et al, 2019;Ulasyar and Lazoglu, 2018). The saturation limit of most carbon steel alloys is below 1.6 T (Oxley et al, 2009), whereas it tends to 2.35 T for Vacoflux-50.…”

Section: Construction Of the Dampermentioning

confidence: 96%

Study of failure symptoms of a single-tube MR damper using an FEA-CFD approach

Elsaady

Oyadiji

Nasser

2020

Journal of Intelligent Material Systems and Structures

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A new magnetorheological (MR) damper has been designed, manufactured, modelled and tested under cyclic loads. A faulty behaviour of the damper was accidentally detected during the experiments. It was deduced that the presence of air bubbles within the MR fluid is the main reason for that failure mode of the damper. The AMT-Smartec+ MR fluid used in the current study, a new MR fluid whose characteristics are not available in the literature, exhibits good magnetic properties. However, the fluid has a very high viscosity in the absence of magnetic field. It is assumed that this high viscosity enables the retention of air bubbles in the damper and causes the faulty behaviour. To prove this assumption, a coupled numerical approach has been developed. The approach incorporates a Finite Element Analysis (FEA) of the magnetic circuit and a Computational Fluid Dynamics (CFD) analysis of the fluid flow. A similar approach was presented in a previous publication in which an ideal behaviour of an MR damper (no effect of air bubbles) was investigated. The model has been modified in the current study to include the effect of air bubbles. The results were found to support the assumptions for the reasons of the failure symptoms of the current MR damper. The results are shown in a comparative way between the former and current studies to show the differences in flow parameters, namely: pressure, velocity and viscosity, in the faultless and faulty modes. The results indicate that the presence of air bubbles in MR dampers reduces the damper force considerably. Therefore, the effect of the high yield stress of MR fluids due to the magnetic field is reduced.

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“…Magnetorheological (MR) and electrorheological (ER) fluids are noted for the rapid transition, from liquid to solid-like material when an external field is applied 1 – 3 . The MR fluids can be used in a variety of industrial applications such as dampers, clutches/brakes, smart actuators and intelligent structures because of their controllable field-induced yield stress 4 – 6 . A MR brake/clutch may be a good replacement for the conventional disk brake/clutch.…”

Section: Introductionmentioning

confidence: 99%

Transient behavior of compressed magnetorheological brake excited by step currents

Wang

Yong-ju

et al. 2021

Sci Rep

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Transient behavior of a magnetorheological brake excited by step currents under compression-shear mode has been experimentally studied. The results show that the amplitude of the applied current had little effect on the rising time of transient torque, while the rising time was significantly affected by the rotational speed, the compressive speed and the compressive strain position. The falling time of transient torque was independent of the amplitude of the applied current, the compressive speed and the compressive strain position, and it was affected by the rotational speed. The falling time of the transient torque was much shorter than the rising time by a step current. The transient process of MR brake applied as a step current was different from a stable process pre-applied at constant current in different particle chain structure forming processes. In addition, the compressive processes applied in one step current and randomly on/off current were compared and experimentally verified: the particle chains in two processes both experienced the same evolutionary of transient torque. The results achieved in this study should be properly considered in the design and control of magnetorheological brake under compression-shear mode.

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Design and experimental characterization of a twin-tube MR damper for a passenger van

Cited by 28 publications

References 28 publications

Synthesis of magnetorheological fluid and its application in a twin-tube valve mode automotive damper

Synthesis of magnetorheological fluid and its application in a twin-tube valve mode automotive damper

Study of failure symptoms of a single-tube MR damper using an FEA-CFD approach

Transient behavior of compressed magnetorheological brake excited by step currents

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