Abstract
Our study uses the finite element method of modeling and analyzing the functioning of a braking system for a modern vehicle, in terms of stress ditributions, structural deformation, wear and thermal gradient of the brake disc and drum. The 3D geometric model of system brake is designed using Solidworks, and the coupled thermal and structural analysis is performed with the ANSYS Workbench R16 program. The brake was applied when the car was 85.7 km / h (ω = 125 rad · s-1), the duration of braking until the car stopped was t = 5 s. For the given example, the coefficient of average friction during braking, considering the pressure on the pad p = 7.5 MPa, is μ = 0.35. It was discovered that the relative deformations of the plate and disc are larger in the area of the outer diameter than that of the inner diameter. This is also outlined by the fact that the pressure is higher on the outer sides than on the inner sides of the plate, the highest value being in the central axis zone of the outer side. Knowing the thermophysical characteristics of the disc and the plate and the working conditions, it was possible to determine the temperature variation during braking. The results of the numerical research revealed that an increase of the contact pressure and / or the relative speed between the contact surfaces implies an increase of the amplitude of the stick-slip phenomenon.
Highlights
The braking system is used to decrease the velocity of the car to a desired value or even to stop it, immobilizing the car in a stationary, on a horizontal road or on a slope, maintaining the constant speed of the car in the event of descending long slopes
To study structural characteristic and the tribological behavior of the braking system of a car for this study, a simulation program was created in the Ansys Workbench environment
Due to the frictional forces between the front shoe and the drum, the driving force of the rear shoe is higher compared to the driving force of the previous shoe
Summary
The braking system is used to decrease the velocity of the car to a desired value or even to stop it, immobilizing the car in a stationary, on a horizontal road or on a slope, maintaining the constant speed of the car in the event of descending long slopes. The efficiency of the brakes is evaluated by the distance on which a car stops at a certain speed. Depending on the shape of the rotating part, the brakes themselves can be drum (radial), disc (axial) and combined. The main role of a rubbing material is to generate a high coefficient of friction and, at the same time, it should have a very high wear resistance. Wear of the rubbing material is one of the important characteristics of the brake pads. A good functioning is closely associated with the quality of the material, as well as with the safety in operation, and it is directly related to the life of the brakes [2]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
