This paper describes a reliability-based design optimization methodology for structural durability that directly considers expected variations in service loads, material characteristics and finite element analysis modeling. The methodology is based on the development of a stochastic durability limit state model. For a given field reliability target this model can be easily evaluated for known (or assumed) variations; yielding an equivalent deterministic limiting stress. This limiting stress is then used as input (in the form of a durability stress constraint) to an existing structural design optimization tool which, in turn, is used to generate a mass efficient structural design. Because the variations considered are completely comprehended by the stress constraint, the reliability analysis and the structural optimization procedure are uncoupled. Therefore, the methodology is computationally effcient. As a demonstration, the new methodology is used to design a typical automobile shock tower interface structure.


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    Titel :

    Structural optimization with reliability-based durability constraints


    Weitere Titelangaben:

    Design-Optimierungsverfahren für Strukturfestigkeit auf der Basis von Zuverlässigkeitsdaten


    Beteiligte:
    Twu, S.L. (Autor:in) / Tsai, M. (Autor:in) / Subramanian, R. (Autor:in) / Lust, R.V. (Autor:in) / El-Sayed, M.E.M. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2001


    Format / Umfang :

    11 Seiten, 6 Bilder, 4 Tabellen, 9 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Structural Optimization with Reliability Based Durability Constraints

    Twu, S. / Tsai, M. / Subramanian, R. et al. | British Library Conference Proceedings | 1998


    Structural optimization with reliability-based durability constraints

    Twu,S.L. / Tsai,M. / Subramanian,R. et al. | Kraftfahrwesen | 2001


    Structural optimization with reliability based durability constraints

    Twu, Sung-Ling / Tsai, Maolin / Subramanian, Ramaswamy et al. | AIAA | 1998


    Structural optimization with reliability constraints

    Sørensen, J. D. / Thoft-Christensen, P. | Springer Verlag | 1986