The authors developed a fractal branch and bound method for optimization of stacking sequences of laminated composites to maximize buckling load of composite structures. The method demands an approximation of a design space with a response surface comprising quadratic polynomials for pruning branches of stacking sequences. Approximation of the objective function with quadratic polynomials has been confirmed for buckling load maximizations and panel-flutter-speed-limit maximizations using lamination parameters as predictors. Flutter speed maximization of composite delta wing is employed in this study as an example of stacking-sequence optimization using the fractal branch and bound method. This paper describes the theoretical background of the fractal branch and bound method. Then approximations are performed using quadratic polynomials with lamination parameters as predictors. Subsequently, we investigated effectiveness of this method for supersonic flutter of a composite delta wing. Results indicate that the method was applied successfully; a practical optimal stacking-sequence was obtained using modified response surfaces.


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    Title :

    Stacking-sequence optimization of composite delta wing to improve flutter limit using fractal branch and bound method


    Additional title:

    Stapel-Sequenz-Optimierung eines Verbund-Delta-Flügels, um die Flattergrenze zu verbessern durch fraktales Verzweigen und die Grenzmethode


    Contributors:


    Publication date :

    2005


    Size :

    8 Seiten, 10 Bilder, 16 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    AIAA-2004-6439 Fractal Branch and Bound Method for Stacking-Sequence Optimization of Composite Delta Wing

    Hirano, Y. / Todoroki, A. | British Library Conference Proceedings | 2004


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    Todoroki, Akira / Terada, Yuichiro | AIAA | 2002


    Stacking Sequence Optimizations Using Fractal Branch and Bound Method

    Todoroki, A. / Terada, Y. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2002