MVM 2021 - Volume 47 - Number 4
  1. A CONTRIBUTION TO THE DEVELOPMENT OF AUTOMOTIVE MAGNETORHEOLOGICAL BRAKE
    Authors: Aleksandar Poznić, Boris Stojić
    DOI: 10.24874/mvm.2021.47.04.02
    Abstract:

    The main challenges in automotive brake design are maintenance, response time, and braking torque. This paper is a part of the ongoing research that deals with the feasibility of incorporating magnetorheological type brake into the automotive size wheel. Materials, whose rheological properties change reversibly under the influence of an external force, belong to a group called smart materials. This group includes fluids, greases, gels, polymers etc. Materials whose rheological properties change under the influence of an external magnetic field are called magnetorheological materials. Magnetorheological grease is a type of material whose rheological properties also change due to an external magnetic field influence. The main disadvantages of any magnetorheological system are insufficient torque and/or settling effect. Increasing the magnetorheological brake`s braking torque by varying the shape and the number of active surfaces in contact with magnetorheological material is the basis of this research. Research partially relies on the results gained from earlier magnetorheological brake model simulations, done in COMSOL Multiphysics. Dealing with the magnetorheological material`s settling effect, with the usage of magnetorheological greases, has been presented. Magnetic flux distribution analysis was carried out in a number of simulations, using the same software. The proposed design shows great potential.

    Keywords: brake, magnetorheological grease, settling, finite element method, magnetic flux distribution