Study on Thermo-plastic Deformation for One-Piece Brake Disks

980593

02/23/1998

Event
International Congress & Exposition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/980593
Pages
13
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.
Additional Details
Publisher
Published
Feb 23, 1998
Product Code
980593
Content Type
Technical Paper
Language
English