Forming Limit Curve Optimization using Design of Experiments

실험계획법을 이용한 성형한계곡선 최적화 연구

  • Lim, H.T. ;
  • Lee, B.J. ;
  • Rhyim, Y.M. ;
  • Kim, B.K. ;
  • Kim, J.H.
  • 임희택 (한국재료연구원 부설 재료연구소) ;
  • 이병주 (한국재료연구원 부설 재료연구소) ;
  • 임영목 (한국재료연구원 부설 재료연구소) ;
  • 김병기 (한국재료연구원 부설 재료연구소) ;
  • 김정한 (한국재료연구원 부설 재료연구소)
  • Published : 2008.10.09


Forming limit diagram is created by graphical illustration indicating major and minor strain. In order to provide the criterion for forming safety, FLC(forming limit curve) need to be fitted to the diagram. However, the standard method for the strain measurement and FLC plotting are not fixed yet, which results in inconvenience in digitalized analysis. In this study, new construction method for FLC was suggested in order to minimize operator dependency. For this purpose, major and minor strain were measured automatically and analyzed. Then, a second order equation is adopted to fit the FLC. Optimized by response surface method was performed to ensure particular characteristics of the FLC.