Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Effect of Back Tension in Multi-pass Drawing on the Central Bursting Defect

다단인발공정에서 후미인장응력이 중심파괴에 미치는 영향

  • 이성원 (경상대학교 대학원 기계공학과) ;
  • 김민철 (경상대학교 대학원 기계공학과) ;
  • 심규하 (경상대학교 대학원 기계공학과) ;
  • 전만수 (경상대학교 공학부)
  • Received : 2012.05.02
  • Accepted : 2012.07.19
  • Published : 2012.08.01
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Abstract

In this paper, the effect of back tension in multi-pass drawing or wiredrawing on the central bursting defect is investigated using finite element predictions. A rigid-plastic finite element method was used together with the McClintock damage model. Central bursting defects under different back tension stress values ranging from 0% to 20% of the yield strength of the material were predicted and they were compared to understand the effect of the back tension stress values on the central bursting defect. It is found that the level of back tension has a strong influence on the cumulative damage. Thus, higher back tension raises the possibility of the central bursting defect occurring, even though it decreases the interfacial pressure between the die and the work piece.

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References

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