Of increasing importance in the automotive industry is the reduction of development time and costs by virtual prototyping. The accuracy of the numerical methods depends essentially on the correct modelling of the material behaviour and on the assessment of material properties. Especially, the simulation of material damage is important for the development of next-generation ASF (AUDI Space Frame) technology. In this paper, the deformation and fracture behaviour of two aluminium base materials and two welded joints (heat affected zones) is characterised by tests with miniature specimens and simulations with the modified Gurson model which describes the influence of stress triaxiality and loading rate on the damage development with good accuracy. It was found that the anisotropy effect has to be taken into account to model the tension tests with flat specimens. The application of these damage models in, e.g., crash simulations with commercial finite element codes like PAMCRASH gives very promising results. However, the direct transferability of laboratory data to the PAMCRASH-code suffers from the facts, that at this time only small plastic deformations are covered, and, that for practical reasons critical zones in the structure can not be modelled with the necessary mesh refinement. First steps to overcome these difficulties are presented and discussed.


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    Title :

    Improved description of the material behaviour of aluminium automobile components by the Gurson model


    Additional title:

    Verbesserte Beschreibung des Materialverhaltens von Aluminium-Automobilteilen mit Hilfe des Gurson-Modelles


    Contributors:
    Schmitt, W. (author) / Sun, D.Z. (author) / Blauel, J.G. (author) / Christlein, J. (author)


    Publication date :

    1998


    Size :

    8 Seiten, 8 Bilder, 4 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Improved Description of the Materials Behaviour of Aluminium Automobile Components by the Gurson Model

    Schmitt, W. / Sun, D.-Z. / Blauel, J. G. et al. | British Library Conference Proceedings | 1998


    Improved description of the material behavior of aluminium automobile components by the Gurson model

    Schmitt,W. / Sun,D.Z. / Blauel,J.G. et al. | Automotive engineering | 1998


    Improved Description of the Materials Behaviour of AluminiumAutomobile Components by the Gurson Model

    Schmitt, W. / Sun, D.-Z. / Blauel, J. G. et al. | British Library Conference Proceedings | 1998