Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Prediction for Forming Limit of Tube Warm Hydroforming Based on the Ductile Fracture Criteria

연성파괴 이론을 적용한 튜브 온간액압성형의 성형한계 예측

  • 이혜경 (부산대학교 정밀정형 및 금형가공센터) ;
  • 문영훈 (부산대학교 정밀정형 및 금형가공센터) ;
  • 이정환 (한국기계연구원 소재성형센터) ;
  • 이영선 (한국기계연구원 소재성형센터)
  • Published : 2007.10.01
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Abstract

Hydroformability and fracture criteria of FE analysis based on ductile fracture were investigated in warm hydroforming of A16061 tube. To evaluate the hydroformability, uni-axial tensile test and bulge test were performed at room temperature and $200^{\circ}C$. The measured flow stresses were used as input parameters for FE analysis. The damage values were calculated by FE analysis based on ductile fracture criteria at maximum radius of free bulged tubes. Damage values were compared of hexagonal shaped hydroformed parts. As a result, the formability by critical damage value for extruded tube is lower than that of full annealed tube up to 0.5.

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References

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  1. Effect of Process Parameters on Hydroforming Characteristics of a Rectangular Shape Flange vol.21, pp.1, 2012, https://doi.org/10.5228/KSTP.2012.21.1.42