New crash durable epoxy adhesives (CDA) have toughener polymers added to the basic polymer giving the adhesive very good dynamic fracturing behavior. Any cracking in the material takes place in a stable manner enabling the joint to remain intact while the metal folds and absorbs the crash energy. They are thus suitable for application in crash-critical loadcases and enable well-controlled energy absorption to take place by the metal and perhaps even opening new vehicle design possibilities. CDA joining technology also lowers the inevitable stress raisers so common with the traditional, discrete point joining techniques. Such stress raisers compromise the durability and safety of the vehicle they negatively affect its fatigue life and promote stress-corrosion within the basic body structure. To counteract this, panels have to be significantly thicker than otherwise necessary, since they are mostly sized on the peak stresses. These oversized panels, in turn, negatively affect the vehicle fuel efficiency. Adhesive bonding is a natural fit to lightweight vehicle construction - the trend in usage is thus expected to increase. With current joining technology, the inefficient load transfer does not readily allow panels to be reduced in thickness the more even load distribution with adhesives means there is some additional mass reduction to be gained without sacrificing vehicle stiffness. Due to the improved restraint offered by the continuous bondline, a slight reduction in material gauge is recommended when moving from discrete connectors to a bondline, perhaps typically ca. 15%-20% reduction of the thickness in a practical real-life design. When considering the total cost, new generation BETAMATE CDAs offer automotive manufacturers the ability to economically join panels together that are manufactured from different materials while simultaneously performing some of the sealing function. Their rheology has been tuned to speed up vehicle production through automated dosing techniques.


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    Titel :

    Modern crash durable adhesives for structural applications in vehicle bodies


    Weitere Titelangaben:

    Moderne kollisionsbeständige Klebstoffe für strukturelle Anwendungen in Fahrzeugbaukörpern


    Beteiligte:
    Lutz, Andreas (Autor:in) / Wocke, Colmar (Autor:in) / Symietz, Detlef (Autor:in)


    Erscheinungsdatum :

    2006


    Format / Umfang :

    11 Seiten, 12 Bilder, 3 Tabellen, 2 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch




    Modern Crash Durable Adhesives for Structural Applications in Vehicle Bodies

    Lutz, A. | British Library Conference Proceedings | 2006


    Development of Crash Durable Structural Adhesives

    Kawabata, H. / Lutz, A. / Jidosha Gijutsukai | British Library Conference Proceedings | 2008



    Structural adhesives - improvements in vehicle crash performance

    Schulenburg,J.O. / Kramer,A. / Sika Technol.,CH | Kraftfahrwesen | 2004


    Structural Adhesives - Improvements in Vehicle Crash Performance

    Schulenburg, J. O. / Kramer, A. / Society of Automotive Engineers | British Library Conference Proceedings | 2004