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Faculty of Mechanical Engineering, Lj. (FSLJ)
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  • Advanced modelling of sheet metal forming considering anisotropy and youngs modulus evolution
    Starman, Bojan, 1985- ...
    The paper focuses on the modelling of springback within a formed stainless steel sheet. The main subject of this work is the construction of aconstitutive model which simultaneously considers sheet ... anisotropy, damage evolution, and stiffness degradation in material during forming.The developed model is based on the GursonTvergaardNeedleman damage model, which is adequately extended by the implementationof the anisotropic Hill48 plasticity and MoriTanakas approach to stiffness degradation. Considering the established relationships, somematerial parameters that are included in the model are characterised by the corresponding measurements. The experimental validation ofthe developed constitutive model is performed on a springback test, which consists of bending and releasing rectangular stainless steelspecimens that were previously plastically prestrained to a different degree, either in the rolling or transverse direction. A comparison ofthe proposed modelling approach to the classical approach by using the Hill48 model clearly indicates that the simultaneous modelling ofmaterial phenomena, especially the coupling of stiffness degradation with anisotropic plasticity, can be the true key to obtaining a moreaccurate prediction of the springback in sheet-metal-forming applications.
    Source: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 60, no. 2, Feb. 2014, str. 84-92)
    Type of material - article, component part
    Publish date - 2014
    Language - english
    COBISS.SI-ID - 13345307

    Link(s):

    Digitalna knjižnica Slovenije - dLib.si
    DOI

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