Finite element analysis of the limiting dome height (LDH) test has been conducted in order to determine the operant (or effective) friction coefficient pertaining to prephosphated galvanneal under punch stretching conditions. Simulation results indicate that an effective friction coefficient (μ) of about 0.05, which is substantially lower than the experimentally measured drawbead friction coefficient of 0.11, would be necessary to obtain the experimentally observed LDH formability enhancement with prephosphated galvanneal coating over a drawing quality steel substrate. The work also demonstrates that the effect of friction on dome height and minor strain at failure depends on specimen width and substrate strength level, with the relationship being quite nonlinear. The apparent difference in friction behavior between punch stretching and draw bead conditions raises concerns about the use of a single friction coefficient in computer simulation models that are widely used today for up-front die feasibility analysis.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Operant Friction Coefficient of Prephosphated Galvanneal under Punch Stretching


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    International Congress & Exposition ; 1999



    Erscheinungsdatum :

    1999-03-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Operant friction coefficient of prephosphated galvanneal under punch stretching

    Raghavan,K.S. / Bethlehem Steel,Homer Res.Labs.,US | Kraftfahrwesen | 1999


    Operant Friction Coefficient of Prephosphated Galvanneal under Punch Stretching

    Raghavan, K. S. / Society of Automotive Engineers | British Library Conference Proceedings | 1999


    Galvanneal Powdering in Drawbeads

    Rangarajan, V. | SAE Technical Papers | 1997


    Formability performance of prephosphated galvannealed sheet steel

    Lautensleger,R.W. / Davidson,D.D. / AK Steel,US et al. | Kraftfahrwesen | 1997


    Some effects of friction in punch-stretching

    Pearce, R. | Tema Archiv | 1983