Investigation of adhesion recovery phenomenon using a scaled roller-rig

When high creep values occur on a braked/trailing wheelset running on a contaminated track, changes in the friction conditions take place. In fact, the work of the friction forces gradually removes the contaminant from the wheel and rail surfaces. Therefore, lower levels of adhesion are present on the leading wheelsets, while better conditions are restored on the following ones. A deep understanding of this phenomenon is needed to develop new...