Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Elaboration of principles for mapping the tribological system in the FE simulation



Datum: 11.04.2016


Author


Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. A. Brosius

Distinctive geometries in the outer skin of cars lead to high demands on the sheet metal forming process of car body components. For the feasibility analysis of these parts it is necessary to model the forming operations as realistic as possible in the FE simulation. Currently, the tribological conditions of the forming process are modelled by a constant friction coefficient. This simulation approach means a simplification. Therefore, in the context of this work, an analytical approach was developed which considers the friction coefficient in dependency of the mean influencing factors, the contact pressure. This approach was firstly validated by investigations on laboratory tests. Afterwards a verification of the approach by tests on real car body parts was carried out. By using the analytical approach the prediction accuracy of the FE simulation is increased in comparison to a simulation with a constant friction coefficient and thus the process reliability of series production is ensured.