Ductile fracture analysis on the surface and internal fracture of cold forged products

냉간 단조품의 표면 및 내부에서의 연성파괴 해석

  • Kim, Tae-Hyung ;
  • Ko, Dae-Cheol ;
  • Kim, Byung-MinChoi, Jae-Chan
  • 김태형 (부산대학교 대학원 기계설계공학과) ;
  • 고대철 (부산대학교 대학원 기계설계공학과) ;
  • 김병민최재찬 (부산대학교 정밀정형 및 금형가공 연구센터부산대학교 정밀정형 및 금형가공 연구센터)
  • Published : 1996.03.01

Abstract

This paper presents an investigation of the ability of the scheme to simultaneously accomplish both prediction of fracture initiation and analysis of deformation in cold forged products. The Cockcroft-Latham criterion which is successfully applied to a variety of loading situations is used in the present investigation to estimate if and where surface and internal fracture occur during the deformation process. The numerical predictions and experimental results of two types of fundamental cold metal forming process taken into account are compared. Finite element simulation combined with fracture criterion has successfully predicted the site of surface or internal fracture initiation and corresponding to level of deformation observed experimentally.

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