Journal of Information Sciences and Computing Technologies(JISCT) ISSN: 2394-9066 Volume 3, Issue 2 available at www.scitecresearch.com/journals/index.php/jisct/index 196| SCITECH Volume 3, Issue 2 RESEARCH ORGANISATION| April 20, 2015| Journal of Information Sciences and Computing Technologies www.scitecresearch.com Thermal Analysis of disc Brakes Rotor: A comparative Report Shah E Alam 1 , Yuvraj Vidhyadhar 2 , Prashant Sharma 3, Abhishek Jain 4 1,2 UG+PG Students, B.Tech+M.Tech (M&AE), Amity University Rajasthan, JAIPUR 3 UG Student, B.Tech (M&AE), Amity University Rajasthan, JAIPUR 4 Assistant Professor (M&AE), Amity University Rajasthan, JAIPUR Corresponding Author E-mail-shiekhshahealam@gmail.com Abstract In this paper, authors present our results of thermal analysis of disc brake rotor used by two-wheelers in India. The aim of this paper is to realize the purpose of the holes in the disk brake. Thermal analysis is done for two different models of rotors. One is a simple rotor without vents and holes and the other perforated (consists of holes). Researchers have tried to analyze the heat loss from a rotor which is considered to be heated by disc brake friction when in use. Researchers analyze the heat loss taking into account convection and radiation. The results are compared for both the discs. The initial condition assumed here is that the vehicle has stopped completely by application of brakes. Both the rotors are of same dimensions. The geometry of disc brake rotor is made in Solid-Works. The heat transfer analysis is done using ANSYS software. The analysis helps us to understand which of the two models is better in terms of performance, heat loss and manufacturing cost and hence extensively used in motorcycles in real world. Keywords: Thermal analysis; Disc brake rotor; Natural convection; Solid-Works; ANSYS; Heat loss; manufacturing cost. 1. Introduction Disc brakes are an important component of our automobiles. They are employed to halt the vehicle or to slow the vehicle to a required velocity from a given initial velocity. Disc brake is a device which is used to convert kinetic energy into thermal energy by means of friction. The primary function of a brake rotor is to act as a friction surface, generating an opposing torque to a shaft [1]. Belhocine, Abu Bakar andBouchetara[2] stated that Passenger car disc brakes are safety- critical componentswhose performance depends strongly on the contact conditions at the pad-to-rotor interface.The primary components of a disc brake are: 1. The brake pads 2. The calliper, which contains a piston 3. The rotor, which is mounted to the hub A disc brake system consists of a brake disc, a brake calliper and brake pads. When the brake pedal is applied, pressurized hydraulic fluid squeezes the brake pad friction material against the surface of the rotating brake disc, i.e. rotor.The result of this contact produces friction which enables the vehicle to slow down or stop.During braking, energy is transferred to the rotor in the form of heat. McPhee and Johnson[1] have said that when the kinetic energy of the vehicle is converted into heat, this causes excessive heating of rotors. The kinetic energy is transformed into the thermal energy, by means of dry friction effects, which then is dissipated into the surroundings [3]. As a result, the brake rotor must also serve as an efficient energy dissipation and storage device.The conditions which are assumed in this study are as follows: 1. The vehicle is completely stopped after the application of brakes. 2. The material properties of the rotor are isotropic.