Failure Mechanisms of TGV Brake Discs


Article Preview

The CRISFIS project (supported by ADEME agency) consists in jointly studying the squealing and cracking aspects of the high power disc brakes for TGV very high speed trains. This paper deals with the progress concerning the cracking part. An experimental and modelling strategy is adopted in order to better understand and predict brake disc cracking. Braking tests conducted on an industrial scale-one test bench are presented. In a first step, the influence of the pad-type on the thermal loading applied to the disc is studied by means of an infrared camera and thermocouples embedded in the pads and in the disc. In a second step, the thermal maps extracted from thermographic monitoring are used as input data for thermal-mechanical calculations. Finally, the results of modelling and tests are compared to the damage observed on the brake discs.



Key Engineering Materials (Volumes 345-346)

Edited by:

S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim




G. Degallaix et al., "Failure Mechanisms of TGV Brake Discs", Key Engineering Materials, Vols. 345-346, pp. 697-700, 2007

Online since:

August 2007




[1] P. DUFRENOY, G. DEGALLAIX, F. BUMBIELER, JJ. VIET, J. RAISON. Experimental and numerical study of disc brake cracking mechanisms, JEF 2002, (2002), pp.111-122.

[2] B. MIQUEL, S. JEAN, S. LE ROUX, P. LAMESLE, F. REZAI-ARIA. Heat-checking of hot work tool steel, Temperature-Fatigue Interaction, L. Rémy & J. Petit Eds, Elsevier, ESIS publication 29, (2002), pp.185-193.


[3] A. PERSSON, S. HOGMARK, J. BERGSTROM. Thermal fatigue cracking of surface engineered hot work tool steels, Surface & Coatings Technology, 191 (2005), pp.216-227.


[4] V. MAILLOT, A. FISSOLO, G. DEGALLAIX, S. DEGALLAIX. Thermal fatigue crack networks parameters and stability: an experimental study, Int. J of Solids and Structures, 42 (2005), pp.759-769.


[5] J. YAMABE, M. TAKAGI, T. MATSUI, T. KIMURA, M. SASAKI. Development of disc brake rotors for trucks with high thermal fatigue strength, JSAE, Review. 23 (2002), pp.105-112.


[6] A.E. ANDERSON, R.A. KNAPP. Hot spotting in automotive friction systems, Wear, 135 (1990), pp.319-337.


[7] Y. DESPLANQUES, O. ROUSSETTE, G. DEGALLAIX, R. COPIN, Y. BERTHIER. Analysis of tribological behaviour of pad-disc contact in railway braking. Part 1. Laboratory test development, compromises between actual and simulated tribological triplets, Wear, (2006).


[8] P. DUFRENOY. Two-/three-dimensional hybrid model of the thermomechanical behaviour of disc brakes, Proc. IMECHE part F: J. Rail Rapid Transit, Prof. Eng. Publ. 218 (1) (2004), pp.17-30.


[9] S. PANIER, P. DUFRENOY, D. WEICHERT. An experimental investigation of hot spots in railway disc brake, Wear 256, (2004), pp.764-773.