After 15 years of active research topology optimization has now become an industrial tool for preliminary design. Several commercial tools are available on the market. Its application to car body optimization has major advantages. Optimal material distribution can suggest innovative and high performance concepts avoiding long time iterative and intuitive processes. Design can be carried out on the basis of rationale and mathematical arguments while engineers can focus on defining the design constraints of his/her problem. Major on-going and future challenges of topology optimization are devoted to improving the application scope of topology optimization: New applications are concerned with multidisciplinary and recently also to multiphysic problems. For structural problems one should also take care of local constraints that are generally ignored because of the computer time required to solve applications. Manufacturing considerations should also be included as soon as possible in the design loop since they can also modify completely the nature of the optimal solution. However these constraints are extremely difficult to cater with the material distribution representation of the structure. In order to find a mid way between shape and topology optimization in order to be able to control easierly local constraints and manufacturing considerations, recent work has been devoted to introduce the geometry while not loosing the flexibility of topology optimization. The Level Set description offers such capabilities, allowing geometric entities disappearing or merging. In order to work with fixed mesh like in topology optimization one has to use non conforming finite element techniques as the novel extended Finite Element Method. The two elements are the basics of the new research lead at University of Liege using XFEM and level Set description to complement topology optimization and shape optimization.


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    Title :

    Generalized shape and topology optimization: Recent development and application perspectives to automotive structures


    Additional title:

    Verallgemeinerte Form- und Topologieoptimierung: Neuere Entwicklungen und Anwendungsperspektiven im Automobilbau


    Contributors:


    Publication date :

    2006


    Size :

    11 Seiten, 6 Bilder, 8 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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