Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Practical Method for FLD of Mg Alloy Sheet using FEM

유한요소해석을 이용한 마그네슘 합금 판재 성형한계도의 실용적 작성 방법

  • 김경태 (국민대학교 기계설계학과, 한국생산기술연구원) ;
  • 이형욱 (충주대학교 에너지시스템공학과) ;
  • 김세호 (대구대학교 자동차.산업.기계공학부) ;
  • 송정한 (한국생산기술연구원 디지털성형공정팀) ;
  • 이근안 (한국생산기술연구원 디지털성형공정팀) ;
  • 최석우 (한국생산기술연구원 디지털성형공정팀) ;
  • 이용신 (국민대학교 기계자동차공학부)
  • Published : 2008.10.09
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Abstract

Forming Limit Diagram(FLD) is a representative tool for evaluating formability of sheet metals. This paper presents a methodology to determine the FLD using Finite Element Method. For predicting the forming limits numerically. Previous methods such as using the thickness strain or the ductile fracture criterion are limited at plane strain domain. These results suggest that behavior of the void growth in sheet metals is different from real one. In contrast to previous methods, a more exact model which takes void growth into account is used. This result agrees with the experimental result qualitatively.

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