Analysis of the Thermo-Mechanical Behavior of a Multi-Plate Clutch during Transient Operating Conditions Using the FE Method

Abstract

Failures of multi-plate clutches must be reliably excluded due to safety-critical functionalities in the drive train. The main reason for failures of multi-plate clutches due to long-term and spontaneous damage is thermal damage. In this paper, a parameterizable two-dimensional finite element model is developed and validated for damage prevention and for analyzing the thermo-mechanical behavior of a clutch in transient operation. Both numerical verification and validation with experimental results are very good despite the simplifications in the model. Subsequently, the temperature and pressure distribution of the individual friction areas is determined. The results show that the maximum temperatures tend to occur at the outer diameter of the friction area. The pressure distribution is very homogeneous. In a parameter study, the influence of Young’s modulus of the friction lining, the thermal conductivity of the friction lining, and the steel plate thickness on the temperature and pressure behavior in the clutch is investigated. Although the Young’s modulus of the friction lining influences the pressure distribution in the friction contact, the temperature behavior is only slightly changed by the variation of the elastic modulus due to the load case. The thermal conductivity of the lining and steel plate thickness have a strong influence on the temperature level in the clutch. However, the distribution of pressures is still very homogeneous compared to the reference model.

Clutch Pressure Plate Temperature Prediction Based on Bi-LSTM and Migration Learning

“…Then, a finite element model was established for analysis to calculate the thermal stress coupling to analyze the thermal and stress conditions of the pressure plate. Schneider T [7] established a parametric two-dimensional finite element model and verified the validity of the model, which can be used for damage prevention and thermomechanical behavior analysis of clutches during transient operation. Abdullah, Oday I [8] established a friction clutch system (single plate clutch) mathematical model, solved the temperature field during the slipping phase (single plate engagement), and used an axisymmetric model of force generation to simulate the analysis of the friction clutch system during the engagement process.…”

Maßnahmen zur Reduzierung von plastischer Verformung an statischen Druckplatten von Lammellenbremsen infolge einseitig eingebrachter hoher Reibleistung

“…Da die resultierende Verformung einer Brems-oder Kupplungsscheibe wiederrum auf die Druckverteilung bzw. die Reibverhältnisse und damit den Wärmeeintrag auswirken, wenden SChneider T et al [14] Abb. Theoretisch sollte der Betrag der Auftellerung nach der ersten Bremsung nicht mehr deutlich ansteigen, da die thermische Ausdehnung ab der zweiten Bremsung zunächst nur die Vorspannung in der Druckplatte abbaut und als zweites die Stauchung ausgeglichen würde.…”