International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 07 | July -2017
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e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Design and Thermal Analysis of Disc Brake for Minimizing Temperature Deepak S. Hugar1, Prof. U. B. Kadabadi2. 1Department
of Mechanical Engineering (M.Tech in Design Engineering) KLE Dr. M S Sheshgiri College of Engineering and Technology Udyambhag, Belagavi, Karnataka, India 590008 2Department of Mechanical Engineering (Professor) KLE Dr. M S Sheshgiri College of Engineering and Technology Udyambhag, Belagavi, Karnataka, India 590008 ---------------------------------------------------------------------***---------------------------------------------------------------------
4. The brakes must be having enough power to stop the vehicle with in a minimum distance in case emergency.
Abstract –
These day technologies go beyond us. For automotive field, the technology of engine develops very fast even the system of the bike, car, luxury or comforts everything that develops by the innovation of engineer. Thus, safety is the first important thing we must focus. This paper is presented with “Design and Thermal analysis of disc brake for minimizing temperature” which studies about on disc brake rotor by analysis of different shapes of slot of different vehicles Disc brake rotor. Therefore, we can optimize number of shapes of slot to estimate the good thermal conductivity of the disc brake rotor. In this paper, Thermal analysis done on real model of disc brake rotor of Bajaj Pulsar 220 and Thermal analysis of disc brake rotor. Different shapes of slot are because of to reduce the weight of disc rotor and for good thermal conductivity. Hopefully this paper will help everyone to understand Thermal analysis of disc brake rotor and how disc brake work more efficiently, which can help to reduce the accident that may happen in each day. Modeling was done using CATIA V5R21 software and Static and Transient Thermal Analysis was done using ANSYS 15 software.
1.1 CLASSIFICATION OF BRAKES The classification of mechanical braking system in 2 subgroups according to the direction of acting forces are Axial brake Radial brake Axial brake: In this brake, the force acting on the braking system is only in the axial direction to the brake. For example, Disc brake is acting in axial direction. Radial brake: In this brake, the force acting on the braking system is in perpendicular to axial direction. The radial brakes subdivided into internal and external brake.
2. PROBLEM DEFINATION AND OBJECTIVES
Key Words: Disc brake rotor, Thermal analysis etc
Extreme thermal environments are an important issue in the design of sliding contact systems such as brakes and clutches. Thermal stresses due to high temperatures may induce a number of unfavorable conditions such as surface cracks and permanent distortions. Frictional heating, thermal deformation and elastic contact in sliding contact systems affect the contact pressure and temperature on the friction surfaces. If the sliding speed is excessively high, these coupled thermal and mechanical behaviors can be unstable leading to localized high temperature contact regions called “hot spots” on the sliding interface.
1.INTRODUCTION A brake is a device used to generate an artificial frictional which is applied to moving member of machine, for stopping motion. For execution of braking operation, the brakes pad and disc absorb the kinetic energy from wheel. The energy absorbed by brake is generating heat. This heat is passing in to the atmosphere and stops the vehicle, so the braking system should have the following ability; 1.
The brake disc having ability to transfer heat to atmosphere and maintain constant temperature to improve performance of disc.
2.
Anti-wear property of the brakes must be good.
3.
The driver must have have proper control on the vehicle during brake applied and the vehicle should not skid.
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The appearance of these hot spots is known as frictionally excited thermo elastic instability or TEI and is observed in many practical applications, especially brakes and clutches. Hot spots can cause material damage and thermal crack, and induce an undesirable frictional vibration known as “hot judder” in automotive disk brake systems.
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