Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Qualitative and quantitative evaluation of the crash appropriateness of high-strength steels



Datum: 17.12.2009


Author

  • Dr.-Ing. Till Laumann

Reporter

  • Prof. Dr.-Ing. M. Merklein
  • Prof. Dr.-Ing. A. E. Tekkaya
  • Prof. i.R. Dr.-Ing. Dr.-Ing. E.h. mult. Dr. h.c. mult. M. Geiger

Within this work an evaluation method was developed which allows the characterization of the deformation behaviour of high strength steels and the risk of brittle material failure within dynamic exposure by means of a material parameter. The material parameter was validated on the one hand by comparative investigations of the materials in the drop test bench with uniform sample geometries. On the other hand further investigations including tensile tests, optical strain measurements of crash profiles and microscopical investigations were performed. For the investigations different cold and hot formable steels were employed. The hot formed steel was investigated both in the hardened and in the annealed state. In doing so it is possible to investigate the processing parameters, detect potentials for the optimization of the mechanical properties and due to the higher number of tests the validity of a possible alternative material parameter can be increased.