Development of anisotropy in the hole punching process

홀 펀칭공정에서 이방성 발전에 관한 연구

  • 윤종헌 (한국과학기술원 기계공학과) ;
  • 이용신 (국민대학교 기계자동차공학부) ;
  • 김승수 (한국생산기술연구원) ;
  • 김응주 (한국생산기술연구원) ;
  • 허훈 (한국과학기술원 기계공학과)
  • Published : 2005.10.01

Abstract

The shearing and punching processes are analyzed with the finite element method using an isotropic material model. The experimental result in the punching process shows that final radiuses of sheet metal according to the rolling direction and transverse direction are different because of the material anisotropy. The material anisotropy is induced by complicated large deformation in the polycrystalline aggregate. The contact region between the punch and sheet metal experiences severe deformation such as shear, compression and tension in the punching process. In this paper, the analysis of punching process for Al 1100 is performed with the ABAQUS Standard. The analysis of texture development and evolution is carried out based on the deformation history in the punching process. The deformation histories are extracted by UMAT in the ABAQUS Standard. The torture development is investigated with the pole figure and yield surface during the punching process.

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