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Study on Thermo-plastic Deformation for One-Piece Brake Disks
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English
Abstract
Braking tests under overloading were carried out using large one-piece brake disks having eyebrow-shaped holes as decoration. When the number of braking cycles was more than five, permanent deflection of the disks was observed. When the number of braking cycles was less than six, no appreciable deflection occured. The experiment revealed that such deflection occurrs during the cooling process after the final braking cycle. The mechanism for this phenomenon is explained based on the deflection-time record in conjunction with the temperature distribution of disks and its variation with respect to time. The key for this phenomenon is yielding in tension at the bridges between holes. The deflection occurs due to elastic-plastic buckling caused by shrinkage of the flange. Numerical simulations were successfully conducted by using a general 3D FEM in consideration of geometrical and material non-linearities. Reasonable agreements between calculated and experimental results were obtained, which means that the FEM is applicable to evaluate the sensitivity against the temperature induced deflection for patterns of holes and their layout.
Citation
Sasada, M., Fujii, T., and Kameda, N., "Study on Thermo-plastic Deformation for One-Piece Brake Disks," SAE Technical Paper 980593, 1998, https://doi.org/10.4271/980593.Also In
References
- Tirovic M. Day, A. J. “Disk brake interface pressure distributions” Proc. of the Institution of Mech. Eng. 205 1991 137 146
- Day, A. J. Tirovic M. Newcomb, T. P. “Thermal effects and pressure distributions in brakes” Proc. of the Institution of Mech. Eng. 205 1991 199 205
- Lee Kwangjin Barber J.R. “Frictionally Excited Thermoelastic Instability in Automotive Disk Brakes” ASME Journal of Tribology 115 1993 607 614
- Fuad Khairul Daimaruya M. Kobayashi H. “TEMPERATURE AND THERMAL STRESSES IN A BRAKE DRUM SUBJECTED TO CYCLIC HEATING” Int.Jour. of Thermal Stresses 17 1994 515 527