Role of Magnetorheological Fluids and Elastomers in Today’s World

Abstract

This paper explains the role of magnetorheological fluids and elastomers in today's world. A review of applications of magnetorheological fluids and elastomers in devices and machines is presented. Magnetorheological fluids and elastomers belong to the smart materials family. Properties of magnetorheological fluids and elastomers can be controlled by a magnetic field. Compared with magnetorheological fluids, magnetorheological elastomers overcome the problems accompanying applications of MR fluids, such as sedimentation, sealing issues and environmental contamination. Magnetorheological fluids and elastomers, due to their ability of dampening vibrations in the presence of a controlled magnetic field, have great potential present and future applications in transport. Magnetorheological fluids are used e.g. dampers, shock absorbers, clutches and brakes. Magnetorheological dampers and magnetorheological shock absorbers are applied e.g. in damping control, in the operation of buildings and bridges, as well as in damping of high-tension wires. In the automotive industry, new solutions involving magnetorheological elastomer are increasingly patented e.g. adaptive system of energy absorption, system of magnetically dissociable [hooks/detents/grips], an vibration reduction system of the car's drive shaft. The application of magnetorheological elastomer in the aviation structure is presented as well.

Magnetorheological Elastomers: Fabrication, Characteristics, and Applications

“…The versatility of their wide applications is caused by noiseless operation, rapid field responsiveness of MRFs relative insensitivity to small quantities of contaminants or dust, and easy control [ 16 ]. On the other hand, despite that MRFs are possessing significant merits with many potential applications, their disadvantages include sealing issues due to the leakage of the medium liquid, contaminating environment, and sedimentation of the particles [ 17 ]. Hence these drawbacks limit to the further expansion of its engineering applications.…”

Finite Element Magnetic Method for Magnetorheological Based Actuators

“…The absence of a magnetic field in this fluid causes its lower viscosity. These particles have a tiny size, ranging from 3 to 10 microns [17]. The magnetic particles of M.R.…”

“…However, the application of M.R. fluid is extensive due to its precise control capabilities and dynamic response [17,18]. The resulting output is relatively faster and more accurate because it uses an electric current as a conductor when compared to conventional mechanical mechanisms [19].…”

“…M.R. devices typically consist of hydraulic cylinders containing micron-sized magnetically polarized particles suspended in the fluid [17,18].…”

A Review of the Contribution of Mechanomutable Asphalt Materials Towards Addressing the Upcoming Challenges of Asphalt Pavements

“…As shown in Figure 2, the characteristics of magneto-rheological fluids provide a medium (in this case a bituminous matrix) in which to magnetically suspend active particles during the absence of magnetic fields. However, when magnetic fields are present, these materials have the capacity to behave as a quasi-solid material, increasing the apparent viscosity of the material [35,36], modifying its rheological behavior from Newtonian to viscoelastic [37] and impeding the movement of the magnetically active particles, which produce an internal stress tensor in the mixture [5].…”