금속성형공정에서 연성파괴예측

Prediction of Ductile Fracture in Metal Forming Processes

This paper suggests the scheme to simultaneously accomplish prediction of fracture initiation and analysis of deformation in metal forming processes. the Cockcroft-Latham criterion is used to estimate whether fracture occurs during the deformation process. The numerical predictions and experimental results of simple upsetting are compared. The proposed scheme successfully predicted the fracture initiation found experimentally.