The topological optimization of components to maximize crash energy absorption for a given volume is considered. The crash analysis is performed using a DYNA3D finite element analysis. The original solid elements are replaced by ones with holes, the hole size being characterized by a so-called density (measure of the reduced volume). A homogenization method is used to find elastic moduli as a function of this density. Simpler approximations were developed to find plastic moduli and yield stress as functions of density. Optimality criteria were derived from an optimization statement using densities as the design variables. A resizing algorithm was constructed so that the optimality criteria are approximately satisfied. A novel feature is the introduction of an objective function based on strain energies weighted at specified times. Each different choice of weighting factors leads to a different structure, allowing a range of design possibilities to be explored. The method was applied to an automotive body rear rail. The original design and a new design of equal volume with holes were compared for energy absorption.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Application of topological optimization techniques to structural crashworthiness


    Weitere Titelangaben:

    Einsatz von topologischen Optimierungsverfahren zur Aufprallsicherheit von Strukturen


    Beteiligte:
    Mayer, R.R. (Autor:in) / Kikuchi, N. (Autor:in) / Scott, R.A. (Autor:in)


    Erscheinungsdatum :

    1994


    Format / Umfang :

    12 Seiten, 25 Bilder, 1 Tabelle, 20 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Crashworthiness design using structural optimization

    Schramm, Uwe / Thomas, Harold | AIAA | 1998


    Structural optimization for vehicle crashworthiness

    FONSEKA SANJAYA | Europäisches Patentamt | 2015

    Freier Zugriff

    Structural topology optimization for crashworthiness

    Soto,C.A. / Ford Motor,US | Kraftfahrwesen | 2004


    Crashworthiness Design Using Structural Optimization

    Schramm, U. / Thomas, H. / AIAA et al. | British Library Conference Proceedings | 1998


    Structural Crashworthiness

    N. Jones / T. Wierzbicki | NTIS | 1983