1Mechanical Engineering Department, University of Badji Mokhtar, Po Box 12, Annaba, 23000, Algeria2Civil Engineering Laboratory (LGC), University of Badji Mokhtar, Po Box 12, Annaba, 23000, Algeria.
Soumis le : 03/05/18 Révisé le : 30/09/2018/ Accepté le : 30/09/2018
The analysis of the contact steel/composite allowed to raise a diagnosis of the wears of soles in composite materials of brake of cars SNTF. Real tests on in-use testing carried out on 32 cars including 256 clogs evolving in variable weather situation, during several shuttles on a route of 600 km allowed to study the on-line behavior of clogs in the course of exploitation and to raise a classification of the wears allowing to identify that it more frequent. A comparison established between two wintry and summer (summery) periods explains the influence of the temperature on the wear of clogs. Downstream, measurements of the physical and mechanical characteristics of the organic matrix C/C composite component of wagons brake shoe blocks show a characteristic dispersion mainly of the heterogeneous appearance of this type of material. Some braking tests carried out on a tribometer, enabled to study the frictional behavior and identify the physical mechanisms of friction, which were activated with contact under severe braking loads.
Keywords : carbon/carbon composite , brake shoe , brake pad , wear , braking ,friction