The influence of the manufacturing sequence and parameters on the fatigue strength and the damage behaviour of two typical car body weld joints at cyclic loading was investigated. The welding procedure, the parameters and design features like the semifinished products are varied specifically for the joints. The fatigue tests in combination with the failure analysis show that a significant increase of fatigue life is possible for both model structures by adjusting their geometry and their manufacturing technique. The failure behaviour influencing the structures fatigue life is affected by the global as well as by the local geometry. The global influence at the laser welded joint sheet-extrusion is given by the gap width which has to be tolerated up to a certain limit especially in complex structures. As local influence the notch geometry in the joint gap was identified, which is affected by the combination of welding parameters but cannot be described exactly up to now. The global failure factor of the joint extrusion-extrusion is given by the type of connection in which the corner area of the weld represents the position of maximum flux of force. While this influence is typical for the construction and not changeable, the local formation of the corner can be optimized by maximum penetration of the weld root and prevention of craters in the corner area. This optimization is exemplarily shown by the adjustment of the extrusion geometry and the welding sequence to the MIG welding process selected because of its efficiency.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Optimization of aluminium light weight structures for automotive series production


    Additional title:

    Optimierung von Leichtbaustrukturen aus Aluminium für die Automobilindustrie


    Contributors:
    Gerber, A. (author) / Schulze, V. (author) / Kaiser, M. (author) / Leitermann, W. (author) / Löhe, D. (author)


    Publication date :

    2000


    Size :

    8 Seiten, 18 Bilder, 1 Tabelle, 12 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Innovations for Automotive Light Weight Solutions: The Steel Aluminium Hybrid Blank

    Arenholz, Enno / Brugger, Gerald / Bruckner, Jürgen | Tema Archive | 2011


    Aluminium - Fly Ash Composites as Light Weight Materials for Automotive Industry

    Shanmughasundaram, P. / Subramanian, R. | British Library Conference Proceedings | 2011


    Design and Production of Adhesively Bonded Aluminium Automotive Structures

    Hunter, J. / Nardini, D. / Gao, Y. et al. | British Library Conference Proceedings | 1998


    Design and production of adhesively bonded aluminium automotive structures

    Hunter,J.A. / Nardini,D. / Gao,Y. et al. | Automotive engineering | 1998


    Design and production of adhesively bonded aluminium automotive structures

    Hunter, J.A. / Nardini, D. / Gao, Y. et al. | Tema Archive | 1998