Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Application of technological tests for the extension of failure prediction at body parts out of AHSS



Datum: 24.05.2016


Author


Reporter

  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. K. Roll

The insufficient accuracy of failure prediction within the FE-simulation for advanced high strength steels impedes the production of car body components. Process specific load cases like pure or superimposed bending are not sufficiently considered by common material characterization methods. Moreover, these load cases are typically for the described material class.
Through the application of an additional stress based failure criterion, the rupture risk evaluation can be improved early on in the development of components. The consideration of bending loads in the definition of stress limit curves ensures a process based evaluation. For the definition of limit curves, the experimental procedure and the determination of critical stress states within technological tests as well as the transmission on the failure criterion are developed and presented. Furthermore, specific proposals for the improved execution of technological tests are given, to make them more comparable.