Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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A Study on the Drawing of Strip by Upper Bound Elemental Technique

상계요소법에 의한 판재 인발공정에 관한 연구

  • 허관도 (동의대학교 기계산업시스템 공학부) ;
  • 최영 (인제대학교 기계자동차 공학부) ;
  • 최일국 (동의대학교 일반대학원 기계공학과)
  • Published : 2003.02.01
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Abstract

For metal forming analysis, upper-bound solution is a practical method because the solution is overestimated. However it is not easy to determine the stresses on dies by using upper-bound solution. In this study, new scheme to calculate the stresses on dies based on upper bound solution is proposed. In the velocity fields, imaginary velocity is adapted to analyze the normal pressure on die surfaces. To verify the proposed scheme. plane strain drawing has been considered. The stresses on dies obtained by the proposed scheme are compared with the results of rigid plastic FEM and the experimental results. In the experiments, pressure film is used to measure the normal pressure on dies.

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References

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