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

한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
권호 표지

Combined Isotropic-Kinematic 경화규칙에 기초한 자동차용 알루미늄합금-및 Dual-Phase 강 판재의 스프링백 예측

Spring-back Evaluation of Automotive Sheets Based on Combined Isotropic-Kinematic Hardening Rule

  • 이명규 (서울대학교 재료공학부) ;
  • 김대용 (서울대학교 재료공학부) ;
  • 정관수 (서울대학교 재료공학부) ;
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  • Chongmin Kim (Materials ＆ Processes Lab., General Motors) ;
  • Michael L. Wenner (Manufacturing Systems Research Lab., General Motors)
  • 발행 : 2003.10.01
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초록

In order to evaluate spring-back behavior in automotive sheet forming processes, a panel shape idealized as a SS-rail has been investigated. After spring-back kas been predicted fer SS-rails using the finite element analysis, results has been compared with experimental measurements for three automotive sheets. To account for hardening behavior such as the Bauschinger and transient effects in addition to anisotropic behavior, the combined isotropic-kinematic hardening law based on the Chaboche type single-surface model and a recently developed non-quadratic anisotropic yield function have been utilized, respectively.

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