A new strain-based forming limit criterion is proposed to assess the localized necking failure for sheet metal forming simulations when deformation paths deviate significantly from linearity. Different from the traditional strain-based Forming Limit Diagrams (FLD) in terms of major and minor strains, the new FLD is constructed based on effective strains and material flow direction at the end of forming. This new criterion combines the advantages of stress-based FLD for its path-independence and the traditional linear strain path FLD for its easy interpretation. The proposed FLD is validated through both theoretical prediction with Marciniak-Kuczynski (M-K) model and available experimental data in literature, and its relationship with stress-based FLDs is discussed.


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    Titel :

    A Path Independent Forming Limit Criterion for Sheet Metal Forming Simulations


    Weitere Titelangaben:

    Sae Int. J. Mater. Manf
    Sae International Journal of Materials and Manufacturing


    Beteiligte:
    Zeng, Danielle (Autor:in) / Chappuis, Laurent (Autor:in) / Zhu, Xinhai (Autor:in) / Xia, Z. Cedric (Autor:in)

    Kongress:

    SAE World Congress & Exhibition ; 2008



    Erscheinungsdatum :

    2008-04-14


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Forming limit at sheet metal forming

    Tmej, J. / Mikes, V. / Buchar, Z. | Tema Archiv | 1989


    Forming limit diagrams for CNC RPIF of sheet metal

    Jeswiet, J. / Young, D. / Szekeres, A. | Tema Archiv | 2003




    Sensitivity of Material Constitutive Parameters in Sheet Metal Forming Simulations

    Shi, M. F. / Prince, D. G. / Song, W. et al. | British Library Conference Proceedings | 1998