Failure of truck brake discs: A coupled numerical–experimental approach to identifying critical thermomechanical loadings

Premature failure is the major problem encountered in the operation of truck brake discs. The present study was carried out with the aim of developing brake discs with increased lifespans, so as to improve the safety and reliability of these components. To this end, two aspects, namely design and ma...

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Bibliographic Details
Published in:Tribology international 2013-03, Vol.59, p.114-120
Main Authors: Collignon, M., Cristol, A-L., Dufrénoy, P., Desplanques, Y., Balloy, D.
Format: Article
Language:English
Subjects:
Disc
Failure
Mechanical
Thermal
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Summary:Premature failure is the major problem encountered in the operation of truck brake discs. The present study was carried out with the aim of developing brake discs with increased lifespans, so as to improve the safety and reliability of these components. To this end, two aspects, namely design and material, were investigated. In order to understand the different damage modes, we studied the behaviour of a grey cast iron brake disc combined with two semi-metallic pads under extreme conditions. A coupled numerical–experimental approach enabled us to determine the critical thermomechanical loadings associated with braking-induced metallurgical phase transformations. ► A disc was tested on a bench in order to investigate its damage evolution. ► An experimental–numerical analysis defines the stress–strain cycle during tests. ► Investigations confirmed the occurrence of microcracks and phase transformations. ► To conclude, the identified critical stop-braking is what led to the disc failure.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2012.01.001