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Selection of Materials in Designing Magnetorheological Brake

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Abstract:

The braking system is among the most significant active safety systems in a vehicle application for preventing injuries and property damage. Whether for light or heavy vehicles, brakes are no longer a small issue whereas it becomes a crucial problem to maintain the safety and to avoid the unpredictable cases especially on the road. Advanced technology in automotive industry has produced a new coming design of Magnetorheological (MR) brake which a field change is triggered off by changing the current in the coils exciting the magnetic field. MR fluid is one of the members of smart material which applicable usage to achieve the standard of rotary high speed similar as the existing brake disc in hydraulic system. A new MR brake disc was proposed using the squeeze mode rather than only conventional mode at the upper and lower rotating rotor. Parameters that have been considered are the types of MR fluid, selection of magnetic material, non-magnetic material and coil configurations. Then a finite elements analysis was performed to analyse the result of magnetic circuit and magnetic field strength within the MR brake configuration. MRF-140CG has been selected to represent the fluid to enhance the maximum magnetic flux density. The results showed that AISI 1020 and Stainless Steel 316 meet the requirement of material selection of magnetic and non-magnetic. Indirectly, yield stress has been significant increase when the magnetic field strength rises at certain value. Therefore, intention on design innovation of MR brake is useful to efficient control by upgrading function of those parameters which has been presented.

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Periodical:

Applied Mechanics and Materials (Volume 663)

Pages:

700-704

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.663.700

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Online since:

October 2014

Authors:

Lailatul Hamidah Hamdan*, Saiful Amri Mazlan, Shamsul Sarip, Hairi Zamzuri, Mohd Azizi Abdul Rahman

Keywords:

Brake Disc, Magnetorheological Fluid, MR Brake Design, Shear Mode, Squeeze Mode

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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