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On the Design of Anti-Squeal Friction Pads for Disc Brakes
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English
Abstract
Modeling of friction pad in disc brakes as a distributed parameter system (mass-inherent damping-elasticity) is made in order to show the conditions of stable vibrations, The interface characteristics of the pad/disc assembly beside the negatively sloped friction-velocity relationship are taken into account. The interface characteristics are represented by the effective contact stiffness as well as the friction damping of both pad and disc surfaces. It is shown that continuous modification of the equivalent contact stiffness by wear mechanism or by any other mechanism, is the mean cause of squeal triggering. The analysis has shown that stability can be attained at all possible squeal frequencies of the friction pad by the good selection of its geometrical configuration (thick, wide and short brake pad) and its material loss factor within certain limits. Moreover, it is necessary to choose the appropriate way of pad fixation inside the caliper to give higher modes of vibrations. According to the considered model of longitudinal vibrations, it is found that stability of motion is independent of the value of coefficient of friction whereas it depends upon its negative slope.
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Citation
Sherif, H., "On the Design of Anti-Squeal Friction Pads for Disc Brakes," SAE Technical Paper 910575, 1991, https://doi.org/10.4271/910575.Also In
References
- Fossberry R.A. Holubecki Z. “An Investigation Of The Cause And The Nature Of The Brake Squeal” MIRA Report No. 1955/2
- Sinclaire D. Manville N.J. “Frictional Vibrations” Journal of Applied Mechanics June 1955 207 213
- Yokoi M. Nakai M. “A Fundamental Study On Frictional Noise: First Report; The Generating Mechanism Of Rubbing Noise And Squeal Noise” JSME 22 173 November 1979
- Yokoi M. Nakai M. “A Fundamental Study On Frictional Noise: Second Report; The Generating Mechanism Of Squeal Noise Of Higher Modes” JSME 23 186 December 1980
- Tarter J.H. “Disc Brake Squeal” SAE paper 830530
- Fossberry R.A.C. Holubecki Z. “Some Experiments Of The Prevention Of Brake Squeal” MIRA Report No. 1957/1
- Kusano M. Ishidou H. Matsumura S Washizu S. “Experimental Study On The Reduction Of Drum Brake Noise” SAE paper 851465
- Lang A.M. Smales H. “An Approach To The Solution Of Disc Brake Vibration Problems” Inst. Mech. Engrs 223 231 1983
- Spurr R.T. “A Theory Of Brake Squeal” Proc. Inst. Mech. Engrs. 1 33 40 1961/1962
- Jarvis R.P. Mills B. “Vibrations Induced By Dry Friction” Proc.Inst Mech. Engrs 178 1963/1964
- Watari A. Sugimoto T. “Vibrations Caused By Dry Friction” JSME 7 25 1964
- Rhee S.K. “Friction Coefficient Of Automotive Friction Materials-Its Sensitivity To Load, Speed And Temperature” SAE paper 740415
- Felske A. Happe A. “Vibration Analysis By Double Pulsed Laser Holography” SAE paper 770030
- Felske A. Hoppe G. Matthai H. “Oscillations In Squealing Disk Brakes-Analysis Of Vibration Modes By Holographic Interferometry” SAE paper 780333
- North M.R. “Disc Brake Squeal-A Theoretical Model” MIRA Report No.1972/5
- Millner N. “An Analysis Of Disc Brake Squeal” SAE paper 780332
- Earles S.W.E. Badi M.N.M. “On The Interaction Of Two-Pin-Disc System With Reference To The Generation Of Disc-Brake Squeal” SAE paper 780331
- Connolly R. Thornley R.H. “Determining The Normal Stiffness Of Joint Faces” ASME paper No.67 1967
- Burdekin M. Cowley A. Back N. “Experimental Study Of Normal And Shear Characteristics OF Machined Surfaces In Contact” Journal of Mech. Engrs. Sc.- I.Mech. E 20 3 129 1978
- Mindlin R.D. “Compliance Of Elastic Bodies In Contact” ASME Journal of Applied Mechanics 16 1949
- Onions R.A. Archard J.F. “The Contact Of Surfaces Having.A Random Sturcture” Journal of Phys. D. D 289 1973
- Greenwood J.A. Williamson J.B.P. “Contact Of Nominally Flat Surfaces” Proc. Roy. Soc. London A295 300 319 1966
- Cretegny J.F. “Etude Theorique Et Experimentale Des Raideurs De Contact” I.S.M.C.M. France 1985
- Craig R.P. “Structural Dynamics” John Wiley & Sons Inc. 1981
- Meirovitch L. “Elements Of Vibration Analysis” McGraw-Hill Inc. 1975
- Thomas T.R. Sayles R.S. “Stiffness Of Machine Tool Joints: A Random Process Approach” ASME Journal of Engineering For Industry 99B 250 1977