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Study on Crack Initiation at Small Holes of One-piece Brake Discs
Technical Paper
2002-01-0926
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Tiny (hair-like) cracks initiated around small holes in the flange of one-piece brake discs were observed at an overloading condition. Thermally induced cyclic stress strongly affects the crack initiation in the brake discs. In order to show the crack initiation mechanism, the temperature distribution at the flange was firstly measured. The temperature distribution under overloading was analyzed by using the finite element method. Based on the experimental and calculated results, the crack initiation mechanism for one-piece brake discs at the very severe braking condition was explained. In addition, the effective methods are suggested for reducing the initiation of tiny cracks around the holes.
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Citation
Nakatsuji, T., Okubo, K., Fujii, T., Sasada, M. et al., "Study on Crack Initiation at Small Holes of One-piece Brake Discs," SAE Technical Paper 2002-01-0926, 2002, https://doi.org/10.4271/2002-01-0926.Also In
References
- Sasada M. et al. Effects of hole layout, braking torque and frictional heat on crack initiation from small holes in one-piece brake discs Seoul 2000 FISITA World Automotive Congress 2000
- Limpert R. Temperature and stress Analysis of Solid-rotor Disc Brake University Microfilms International 1984
- Grieve D. G. et al. Design of a lightweight automotive brakedisc using finite element and Taguchi techniques Proc Inst Mech Eng 212 1998 245 254
- Jimbo, Y. et al. Development of High Thermal Conductivity Cast Iron for Brake Disk Rotors SAE Transactions 99 1990 1 7