Magnetorheological (MR) Fluids

Hajalilou, Abdollah; Mazlan, Saiful Amri; Lavvafi, Hossein; Shameli, Kamyar

doi:10.1007/978-981-10-2495-5_3

Cited by 4 publications

(4 citation statements)

References 124 publications

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“…Some aspects of MR fluid rheology can be modified upon the application of an external magnetic field. During the off-state they flow freely, and the particles become polarized and rearrange into chain-like structures in the same direction as the applied magnetic field in the on-state [117,119,120,[131][132][133] as shown in Fig. 14.…”

Section: Magnetorheological (Mr) Fluidsmentioning

confidence: 99%

Magnetic Fields to Enhance Tuned Liquid Damper Performance for Vibration Control: A Review

Vázquez-Greciano,

Aznar López,

Buratti

et al. 2023

Arch Computat Methods Eng

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Tuned Liquid Dampers (TLDs) are dissipative devices whose distinguished features like low cost in installation and maintenance or their multidirectional and multifrequency application to new and already existing structures make them an attractive damping option. Their working principle is similar to that of a Tuned Mass Damper but in this case the relative movement comes from a fluid that provides with mass, damping and stiffness. Moreover, TLDs can mitigate both horizontal and vertical vibrations. All these make TLDs worth deeply studying. TLD utilization in civil vibration control arose in the 1980s. From early years, different improvements have been implemented to achieve a better performance. Some of these modifications include passive variations in the geometry or the fluid. The use of smart materials applied on TLDs has also been of great interest since the 1990s and comprehends different configurations in which magnetic fields are used to passively or semi-actively improve the TLD performance. A lack of review is detected in this field. For this reason, a state-of-the-art review is presented in this paper. Its aim is to help researchers find a thorough, up-to-date classification of the different possibilities, configurations, numerical evaluation, materials used and also found limitations and future development in the application of magnetic fields on TLDs.

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Section: Magnetorheological (Mr) Fluidsmentioning

confidence: 99%

Magnetic Fields to Enhance Tuned Liquid Damper Performance for Vibration Control: A Review

Vázquez-Greciano,

Aznar López,

Buratti

et al. 2023

Arch Computat Methods Eng

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“…The beginning of MR fluids dates back to 1948 when they were discovered by Jacob Rabinow at the US National Bureau of Standards [4,5]. An MR fluid is a type of smart fluid whose rheological properties change in the presence of an external magnetic field.…”

Section: Introductionmentioning

confidence: 99%

“…MR fluid is a mixture of carrier fluid and micrometersized magnetic particles. The change in viscosity is attributed to the formation of chains of particles, which hinder the free flow of the surrounding fluid (Figure 1) [4]. A spherical MR actuator was designed and optimized in this article.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization of a Spherical Magnetorheological Actuator

Vizjak,

Hamler,

Jesenik

2023

Mathematics

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Recently, an increasing number of electromagnetic devices have been using smart fluids. These include ferrofluids, electrorheological fluids, and magnetorheological (MR) fluids. In the paper, magnetorheological fluids are considered for use in a spherical actuator for haptic applications. An approach is presented to the design and optimization of such a device, using finite element method modelling linked with differential evolution (DE). Much consideration was given to the construction of the objective function to be minimized. A novel approach to objective function assembly was used, using reference values based on the model design and created with parameters set to the midpoint values of the selected range. It was found to be a useful strategy when the reference values are unknown. There were four parameters to be optimized. Three of them gravitated towards the boundary value, and the fourth (actuator radius) was somewhere in between. The value of the objective function reached a minimum in the range of actuator radius between 42.9880 mm and 45.0831 mm, which is about a 5% difference in regard to the actuator radius. Three passes of optimization were performed with similar results, proving the robustness of the algorithm.

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“…This MR damper makes the viscosity to more apparent, operate in less current, which produce high damping force. In semi active the properties will be varied dynamically, therefore which is quite effective in structural control responses due to its wide range loading condition [1][2][3][4][5]. The main advantage of semi active control device is their low power requirement.…”

Section: Introductionmentioning

confidence: 99%

Effects of Creep on RC Frame Subjected to Cyclic Load with Magnetorheological Damper

Cruze¹,

Gladston²,

Loganathan³

et al. 2020

Creep Characteristics of Engineering Materials

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The study aims to discuss about a magnetorheological (MR) damper subjected to cyclic load test in reinforced concrete frames (RC). Two RC frames were cast, the dimension and detailing were adopted as per codal provisions. The effects of stress, strain, displacement and load behavior for RC element with various time interval is studied with and without MR damper. The typical creep curve of RC frame reveals, the creep rate decreases with time until reaching the steady state, after the initial deflection. The result shows that the incorporation of the MR damper reduced the displacement by 49% and an increase in load carrying capacity of 55% was attained compared with the RC frame without damper.

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Magnetorheological (MR) Fluids

Cited by 4 publications

References 124 publications

Magnetic Fields to Enhance Tuned Liquid Damper Performance for Vibration Control: A Review

Magnetic Fields to Enhance Tuned Liquid Damper Performance for Vibration Control: A Review

Design and Optimization of a Spherical Magnetorheological Actuator

Effects of Creep on RC Frame Subjected to Cyclic Load with Magnetorheological Damper

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