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Coated Rotor and Slotted Pad in a Good Interactions
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 06, 2002 by SAE International in United States
Annotation ability available
Coating is very important in some applications particularly disc brakes that are most commonly used in the passenger cars. Slotted friction material also has a great effect on the behaviour of the disc brake friction. Mixing between the coated rotor and the slotted material is of importance to improve the frictional behaviour of the disc brake. Slotted material used in this work is divided into two parts; each part has leading and trailing edge to give the advantages of using two pads in a single braking action. Simulating the kinetic energy of a passenger car to measure the friction force between the disc and pad at different operating conditions have been designed in a test rig. The effect of thermal loading at the sliding interface between the different friction material and the rotor of Floating Calliper Disc Brake (FCDB) has been studied in this work. Initial disc surface temperature was measured and controlled through a high quality technique by using a thermal camera that was fixed at suitable place close to the rotor. The signal from the transducer was amplified and displayed on a digital storage oscilloscope and then fed to a computer for the final analysis. The results showed the different values of coefficient of friction depending on the different operating conditions. The maximum coefficient of friction was 0.58 that was recorded at initial disc surface temperature of 150°C while the braking pressure was 20 bar. The minimum value for the friction coefficient 0.30 was also recorded at initial disc surface temperature of 50°C at rotating speed 500 rpm while the braking pressure was 25 bar.
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CitationAhmed, I., Leung, P., and Datta, P., "Coated Rotor and Slotted Pad in a Good Interactions," SAE Technical Paper 2002-01-2599, 2002, https://doi.org/10.4271/2002-01-2599.
- Harding, PR.J Wintle, B.J. “Flexural Effects in Disc Brake Pads” Proc. Instn. Mech. 192 1 5 1978
- Archard, J.F. “Elastic Deformation and the Laws of Friction” Proc. R. Soc. A243 190 205 1957
- Day, A.J. Tirovic, M. Newcomb, TP “Thermal Effects and Pressure Distributions in Brakes” Proc. Instn. Mech. Engrs. 205 199 205 1991
- Chapman, B.J. Hatch, D. “Cast Iron Brake Rotor Metallurgy” Proc. Conf. On Braking of Road Vehicles Inst. Of Mech. Eng. London 143 1976
- Day, A.J. Newcomb, T P “The Use of Finite Element Analysis to Predict Radial Temperature Distributions in an Annular Brake Path” 7t h Leeds/Lyon Symposium on Tribology XII i 333 340 1980
- Ramachandra Rao, VTVS. Ramasubramanian, H. Seetharamu, K.N. “Computer Modelling of Temperature Distribution in Brake Drums for Fade Assessment” Proc. Instn. Mech. Engrs. 202 D4 257 264 1988
- Tumbrink, H.J. “Measurement of Load Distribution on Disc Brake Pads and Optimization of Disc Brakes Using the Ball Pressure Methods” SAE 890863 970 979 1989
- Limbert, R. “The Thermal Performance of Automotive Disc Brakes” SAE 750873 2355 2368 1975
- Ahmed, ILM. “Study of the Behaviour of Vehicle Disc Brakes” University of Northumbria Newcastle Upon Tyne, UK 2002
- Hutching I.M. “Tribology Friction and Wear of Engineering Materials” University of Cambridge London Arnold Edward 1992
- Bejot P.M. “Design and Development of Disc Brakes” IMechE 63 70 1988
- Tanaka S. Kubota K. Iwasaki T. Hatanka H. “The Compatibility of Air Disc Brakes and S-cam Brakes Installed on Combination Vehicles” SAE, No. 902201 653 660 1990