The focus of the presented article is the application of the topology optimization on spot welded structures to find the best placement of the joints automatically. Up to now spot welds are distributed manually along a flange in most cases, e.g. with constant distance between the joints. This leads always to a lot of joints carrying very low load, which can be saved. The goal of optimizing spot weld patterns is to find out automatically the best distribution of the joints providing a desired performance of the overall structure like maximum stiffness. Different examples show that the presented approach works satisfying. Because of the availability of methods and software packages for fatigue assessment of spot welds, the optimization procedure for spot welds can also be extended by fatigue life assessment. This in turn enables to use optimization input parameters for the joints including all significant influences like load time series or multi axial loading. Introducing fatigue assessment into the optimization procedure of spot welds leads a good balance of the load within the joints. Because of using optimization tools based on the optimality criteria approach, the number of necessary analyses is very small compared to other optimization methods like gradient based methods or genetic algorithms. So the presented approach turns out as a very efficient way for an automated finding of improved spot weld patterns. The capability of the method is demonstrated with examples showing principle effects and optimization results of a complete BIW.


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    Titel :

    Optimized spot weld patterns regarding stiffness and fatigue


    Beteiligte:
    Puchner, Klaus (Autor:in) / Dannbauer, Helmut (Autor:in) / Meise, Matthias (Autor:in)


    Erscheinungsdatum :

    2007


    Format / Umfang :

    12 Seiten, 9 Bilder, 7 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




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