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보이드 성장을 고려한 재료의 성형한계에 대한 비 국소 해석
Non-Local Analysis of Forming Limits of Ductile Material Considering Damage Growth

김영석   (경북대학교 기계공학부UU0000096  ); 원성연   (경북대학교 대학원 기계공학과UU0000096  );
  • 초록

    In this paper, the strain localization of voided ductile material has been analyzed by nonlocal plasticity formulation in which the yield strength not only depends on an equivalent plastic strain measure (hardening parameter), but also on the Laplacian thereof. The gradient terms in yield criterion show an important role on modeling strain-softening phenomena of material. The influence of the mesh size on the elastic -plastic deformation behavior and the effect of the characteristic length parameter for localization prediction are also investigated. The proposed nonlocal plasticity shows that the load -strain curves converge to one curve. Results using nonlocal plasticity also exhibit the dependence of mesh size is much less sensitivity than that for a corresponding local plasticity formulation.


  • 주제어

    비국소 .   특성길이 .   보이드 .   도함수 의존 소성이론.  

  • 참고문헌 (22)

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  • 이 논문을 인용한 문헌 (1)

    1. Ha, Sang-Yul ; Kim, Ki-Tae 2008. "Study on the Void Growth and Coalescence in F.C.C. Single Crystals" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A, 32(4): 319~326     

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  • 원성연 (1)

    1. 2005 "기공을 포함한 이방성 판재의 성형한계 예측" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A 29 (8): 1139~1145    

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