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THEORETICAL AND EXPERIMENTAL STUDIES ON MAGNETORHEOLOGICAL FLUID DAMPER WITH DC INPUT

Mukund A. Patil, Swapnil L. Sapkale, Sagar Soni, Vijay Sarvaiya, Vishal Parekh, G. H. Raisoni

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Abstract

A magneto-rheological (MR) fluid brake is a device to transmit torque by the shear force of an MR fluid. Magnetorheological fluids (MRF) are smart materials consisting of silicon oil and very small soft-magnetic particles. In a magnetic field, the viscosity and the flow behaviour of the fluid are considerably changed. MRF damper is a device to give damping by the shear stress of MR fluids. A MRF damper has the property whose damping changes quickly in response to an external magnetic field strength. The design method of a new MR fluid damper is investigated theoretically and the structure is presented. The equation of the damping by MR fluids within damper is derived to provide the theoretical foundations in the design of the damper. Based on this equation, after mathematical manipulation, the calculations of the volume, thickness and width of the annular MR fluids within the MR fluids damper are yielded and discussed.

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What this paper is about

A magneto-rheological (MR) fluid brake is a device to transmit torque by the shear force of an MR fluid. Magnetorheological fluids (MRF) are smart materials consisting of silicon oil and very small soft-magnetic particles. In a magnetic field, the viscosity and the flow behaviour of the fluid are considerably changed. MRF damper is a device to give damping by the shear stress of MR fluids. A MRF damper has the property whose damping changes quickly in response to an external magnetic field strength. The design method of a new MR fluid damper is investigated theoretically and the structure is presented. The equation of the damping by MR fluids within damper is derived to provide the theoretical foundations in the design of the damper. Based on this equation, after mathematical manipulation, the calculations of the volume, thickness and width of the annular MR fluids within the MR fluids damper are yielded and discussed.

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Available abstract

A magneto-rheological (MR) fluid brake is a device to transmit torque by the shear force of an MR fluid. Magnetorheological fluids (MRF) are smart materials consisting of silicon oil and very small soft-magnetic particles. In a magnetic field, the viscosity and the flow behaviour of the fluid are considerably changed. MRF damper is a device to give damping by the shear stress of MR fluids. A MRF damper has the property whose damping changes quickly in response to an external magnetic field strength. The design method of a new MR fluid damper is investigated theoretically and the structure is presented. The equation of the damping by MR fluids within damper is derived to provide the theoretical foundations in the design of the damper. Based on this equation, after mathematical manipulation, the calculations of the volume, thickness and width of the annular MR fluids within the MR fluids damper are yielded and discussed.

Key concepts: Magnetorheological fluid, Damper, Bingham plastic, Mechanics, Materials science, Magnetic field, Rheology, Viscosity

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