Experimental study on the temperature evolution in the railway brake disc
Oleksandr Jewtuszenko , Michał Kuciej , Piotr Wasilewski
AbstractIncrease in the operating speed of modern passenger railway vehicles leads to higher thermal load which braking system is subject to. Organic composite friction materials used to manufacture disc brake pads are in general characterised by poor thermal conductivity, which in consequence causes majority of frictional heat to be absorbed by brake disc. In the course of this study the dynamometer tests of three types of brake pads were performed. Metallic fibres, namely steel fibre and copper fibre, were introduced to the formulation of two materials. The third was a non-metallic material to establish a reference case. Dynamometer test programme comprised emergency brake applications at a wide range of initial velocities to determine the frictional characteristics of the tested materials and constant-power drag brake application to analyse the effect of metal fibres on temperature evolution. Temperature was measured by six thermocouples embedded in the brake disc. Mean friction coefficient is analysed and discussed. It is concluded that conductive fibre in the friction material formulation may influence its tribological characteristics. Despite their high thermal conductivity, metal fibres in the concentration tested in this study, did not reduce temperature of the brake disc.
|Publication size in sheets||0.5|
|Book||Proceedings of ICTS 2019, 2019, Zhejiang University, 390 p.|
|Keywords in English||Railway disc brake; Heat partition ratio; Thermal conductivity; Full-scale dynamometer test|
|Internal identifier||ROC 19-20|
|Score||= 0.0, 11-02-2020, ChapterFromConference|
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