An Effective Iteration Method for the Large Deformation Calculation of a Binder Wrap

바인더 랩의 대변형 계산을 위한 효과적인 반복법

  • 오형석 (한양대학교 대학원 기계설계학과) ;
  • 금영탁 (정회원, 한양대학교 정밀기계 공학과) ;
  • 임장근 (한양대학교 공학대학 기계공학과)
  • Published : 1993.07.01

Abstract

When a large automobile sheet metal part is formed in a draw die, the binder wrap is first calculated to predict the initial punch contact location for avoiding wrinkles and severe stretching of its thin blank sheet. Since the boundary of a pseudo blank in calculating a binder wrap by means of a geometrically nonlinear finite element method is unknown in advance, an iteration method is generally used. This paper presents an effective iteration method for correction of the pseudo blank in a binder wrap calculation. For the performance test, two examples are adopted. The calculated results for both examples show the good convergence which wasted solutions are obtained in the second iteration step.

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