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Simplified three-dimensional finite element hot-spotting modelling of a pin-mounted vented brake disc: an investigation of hot-spotting determinants
Tang, Jinghan Qi, Hong Sheng Whiteside, Benjamin R. Babenko, Maksims
Tang, Jinghan
Qi, Hong Sheng
Whiteside, Benjamin R.
Babenko, Maksims
Publication Date
2018-06
End of Embargo
Supervisor
Rights
The final, definitive version of this paper has been published in Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol 232/issue 7 by SAGE Publications Ltd, All rights reserved. © 2017 IMechE.
Peer-Reviewed
Yes
Open Access status
openAccess
Accepted for publication
2017-04-19
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Department
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Additional title
Abstract
Hot spotting is a thermal localisation phenomenon in which multiple hot regions form on a brake disc surface during high energy and/or high speed braking events. As an undesired problem, hot spots can result in high order brake judder, audible drone and thermal cracking. This paper presents a finite element model for hot spot modelling which introduces the classical axisymmetric assumptions to the brake pad in 3D by scaling the material properties combined with a subroutine to simulate the heat generation instead of modelling the rotation of the brake pad. The results from the initial feasibility models showed significant improvement in computing efficiency with acceptable accuracy when compared to a traditional FE model without such simplifications. This method was then applied to the 3D simulation of hot spotting on a realistic ventilated brake disc/pad pair and the results showed good correlation with experiments. In order to improve the understanding of the hot spotting mechanism, parametric studies were performed including the effects of solid and ventilated disc geometry, rotational speed and energy, pins, disc run-out, and brake pad length. Based on the analysis of the results, it was identified that the vents and pins affected the hot spot distribution. Speed was shown to be more important on the hot spot generation time and distribution than either the pressure or total energy input. Brake disc run-out was shown to affect the magnitude of both hot spot temperature and height due to the non-linear relationship between local deformation, contact pressure and heat generation. Finally, increasing the brake pad length generated fewer hot spots but the temperature of each hot spot increased.
Version
Accepted manuscript
Citation
Tang J, Bryant D, Qi H et al (2018) Simplified three-dimensional finite element hot-spotting modelling of a pin-mounted vented brake disc: an investigation of hot-spotting determinants. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 232(7): 877-895.
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Article