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Review Article

JCR. 2020; 7(19): 5639-5654


THERMAL BEHAVIOUR OF DISC BRAKING SYSTEM: A REVIEW

Anant Nemade, Samir Telang, Arvind Chel, Geetanjali Kaushik.

Abstract
Automobile braking is the need of every vehicle it involves mechanical friction between disc and pad
which converts kinetic energy in to heat energy., During braking vehicle decelerates with a by-product of temperature
generation at the interface of disc and pad. This is an instantaneous process, as long as the brakes are engaged the
frictional heat generation continues and over a time it spreads within other components of braking system. Temperature
rise during braking has an adverse effect on the braking performance. Generated heat must be dissipated immediately
otherwise temperature at the interface rises with continuous braking. Presently brakes are cooled by using air as a natural
source for cooling. However, air cooling is not sufficient to carry away all the generated heat, therefore heat accumulates
and creates thermal problems such as brake noise, judder, brake wear, brake fade, squeal, cracking of disc etc. Brake fade
and brake wear are the major common problem associated with thermal behaviour of braking system and directly
contribute to the braking performance. In this paper a literature review is carried out with an aim to present the recent
advances in different aspects concerning thermal behaviour of disc braking system. In some of the literature it has been
observed that changing direction and pattern of cooling vanes between two cheeks or by introduction of X-lattice
structure has given better results than the straight vanes. Changing the composition of friction pad material by addition of
copper will exhibit the smoothest surface topography and the excellent stable frictional behaviour. Proper optimum
number of graphite flakes in grey cast iron will also increases the life of disc by keeping lower temperature during
braking. In most of the research thermal effect analysed by simulation are matching with the experimental results.

Key words: Disc, Pad, Brake, Fade, Wear, Thermal



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