Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Influence of the variation of material properties on the formability of steel grades

Datum: 19.11.2013



  • Prof. Dr.-Ing. habil. M. Merklein
  • Prof. Dr.-Ing. S. Wartzack

Due to the increasing complexity of carbody components, the process window toproduce them free of defects is limited. Consequently,in a serial production processeven small variations of material propertiesmay lead to rejections.The aim of this work was to develop a methodologycapable of detecting the impact ofsignificant varying material properties onthe forming result in an efficient manner. Asa result it should be possible to design arobust process even at the time of processlayout.In a first step, the variation of materialproperties of mild steel grades was determinedin standardized and enhanced testprocedures. The findings were used to analysethe effect on the forming result by aid ofexperimental geometries in FE-simulationand reality. In order to achieve the transferof the results to arbitrary geometries, ascheme within the relation between influencingparameters and the forming result wasdeveloped. This was approved within practicalexperiments with complex car bodycomponents.