Modellierung von Reibung und Verschleiss bei trocken laufenden Kupplungsreibbelägen

The increasing demands concerning the emissions and the comfort of a vehicle require the development of new technologies. One of them is the gear box with dry double clutches. When compared with the clutch of a manual transmission, the requirements on the friction materials are higher. During a shift change the adjustment of the rotation speed of the gear box and the transmission of torque take place separately by the dry clutch. Furthermore after the shift change the clutch must operate with microslip and thus creats additional friction energy, which is responsible for the increase of wear and the change of the friction coefficient. It has therefore become important to further investigate these conditions. The scope of this work is to analyze the change of the friction surface of a dry friction material during the run-in process under constant load and speed. The simulations focus on the changes of the local load, which affect the friction and the wear coefficient. The verification of the model is carried out with experimental measurements.