Abstract
AbstractThe emergency braking distance of a TGV train at a speed of 320 km/h is almost 3000 m. Dry running brakes are reliable due to their predictable response to external stress and are thus used in such applications. The kinetic energy is dissipated proportionately into the brake disc and brake pad. This induced dissipation of energy and the high frequency of brake application cause high temperatures. These immense temperature changes could cause macroscopic cracks leading to failure of discs and accidents [1]. Generally, hot spotting describes the development of thermal localizations and can lead to early damage, early wear, pad performance loss, and squeal noise [2]. The aim of the present study is to improve a disc‐pad transient numerical model by use of a coupled thermomechanical method. It is based on full 3‐d thermomechanical calculations taking disc rotation into account. (© 2014 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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