- 결함 성장을 고려한 수치해석적 성형한계도 예측
- ㆍ 저자명
- 김경태,송정한,이근안,이형욱,김세호,이용신,Kim. K.T.,Song. J.H.,Lee. G.A.,Lee. H.W.,Kim. S.H.,Lee. Y.S.
- ㆍ 간행물명
- 소성가공
- ㆍ 권/호정보
- 2009년|18권 8호|pp.596-600 (5 pages)
- ㆍ 발행정보
- 한국소성가공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
Finite element simulation is an alternative method to practically find the forming limit diagram(FLD). In this paper, the novel fracture criterion is utilized to predict the FLD in conjunction with finite element analysis for sheet forming. The principal scheme of the fracture criterion in this paper is that growth of the micro voids leads up to fracture in the viewpoint of micro-mechanics. The numerical FLD is verified by results of the out-of plane stretching test using hemispherical punch. The verification is also conducted about two types of material. These results are in good accord with the experimental results. Especially, the proposed scheme is appropriate to predict FLDs for a restricted material with low ductility after the instability point or ultimate tensile strength.