Problems of material selection in the design of disc brakes based on magneto-rheological fluid

Magneto-rheological braking devices function due to the ability of a magnetorheological fluid to orderly align domain structures under the action of an external magnetic field. As a braking element in such systems, the disk shape made of ferromagnetic material is most widely used due to the simplicity of the design and the largest usable area during rotation of the elements. The moment of deceleration is significantly affected by the magnitude of the external magnetic field, as well as its distribution over the disk and structural elements. In this study, a method is proposed for choosing materials when designing brake chambers for magneto-rheological disc brake devices, which makes it possible to increase the braking torque. Previously, a simulation was carried out showing the distribution of the magnetic field over the disk depending on the type of material used. For the experimental substantiation of the proposed method, a sample of the braking chamber with a simplified design is used.