Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Influence of a pre-punched hole on bending dominated forming processes

Project Status: finished


The goal of the project was the detailed analysis of the influence and the impact of pre-punched steel and aluminum sheets on subsequent forming operations, which are characterised by bending dominated loading conditions as well as by deep and stretch drawing operations. Especially a resulting failure of the sheet materials was of particular interest. The damage characteristics, which are caused by the pre-punched hole in the forming zone, in the different forming processes were investigated by a systematic approach. Additionally the finite element method was used in order to identify and analyse significant process parameters on the forming and damage behaviour of the processes without the pre-punched hole and to predict occurring damage and failure, which are caused by the pre-punched hole, in dependency of the loading condition.

Project methodology for the analysis of the influence of a pre-punched hole on bending dominated forming processes

Research Groups



    • Tsoupis, I.; Merklein, M.:
      Edge crack sensitivity of lightweight materials under different load conditions.
      IOP Conference Series: Materials Science and Engineering 159(2016)1, pp. 1-8

    • Merklein, M.; Tsoupis, I.:
      Einfluss einer Vorlochung auf biegedominierte Umformprozesse.
      EFB-Forschungsbericht Nr. 450, : Hannover: EFB, 2016

    Letztes Update: 29.09.2016