- 금속성형공정에서 연성파괴예측
- ㆍ 저자명
- 고대철,이진희,김병민,최재찬
- ㆍ 간행물명
- 소성가공
- ㆍ 권/호정보
- 1994년|3권 2호|pp.167-177 (11 pages)
- ㆍ 발행정보
- 한국소성가공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Most of bulk metal forming processes may be limited by ductile fracture such as surface or internal cracks developing in the workpiece. It is important to identify the conditions within the deforming workpiece which may lead to fracture, and then it is possible to modify the forming processes to produce sound and reliable product. This paper suggests the scheme to simultaneously accomplish prediction of fracture initiation and analysis of deformation in metal forming processes. The Cockcroft-Latham criterion which is successfully applied to a variety of loading situations is used in the present investigation to estimate whether fracture occurs during the deformation process. The numerical predictions and experimental results of two types of metal forming process are compared, axisymmetric extrusion and simple upsetting. The proposed scheme has successfully predicted the fracture initiation found experimentally.