The importance of new material applications for improved passive vehicle saftey is increasing. In conjunction with the reduction of the cycle time in vehicle development this leads to a significant involvement of CAE methods to predict the crash performance of cars. In early design phases the FE models are used for concept studies. Based on the results of these studies, component or substructure tests give beneficial input for the final FE vehicle model including all the design proposals which need to be verified in this full vehcile CAE analysis. In this paper, at first a theoretical background of material models is given which describes the plastic behaviour of metal structures in crash analyses. Discussed are: 1. Elasto-plastic damage models, 2. foams and 3. objective integration of rate-type constitutive equations. Results of research projects on the application of new high strength steel sheet metal in side rail structures and aluminium foam in bumper systems are presented. New steel sheet metal grades used for body parts will give the opportunity to reduce weight and increases energy absorption capabilities of structures. For an adequate characterization of the material behaviour an implementation of a special material model which is different to the standard associated flow rule model for solid metals, is required.


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    Title :

    Numerical analysis of new material applications for passive safety


    Additional title:

    Numerische Analysen zum Einsatz neuer Werkstoffe in der passiven Sicherheit


    Contributors:
    Schilling, R. (author) / Paas, M. (author) / Lanzerath, H. (author) / Wesemann, J. (author)


    Publication date :

    2000


    Size :

    26 Seiten, 16 Bilder, 3 Tabellen, 30 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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