This paper describes the development of a fatigue life prediction method for Laser Screw Welding (LSW). Fatigue life prediction is used to assess the durability of automotive structures in the early design stages in order to shorten the vehicle development time. The LSW technology is a spot-type joining method similar to resistance spot welding (RSW), and has been developed and applied to body-inwhite structures in recent years. LSW can join metal panels even when a clearance exists between the panels. However, as a result of this favorable clearance-allowance feature of LSW, a concave shape may occur at the nugget part of the joint. These LSW geometric features, the concavity of nuggets and the clearance between panels, are thought to affect the local stiffness behavior of the joint. Therefore, while assessing the fatigue life of LSW, it is essential to estimate the influence of these factors adequately for the representation of the local stiffness behavior of the joint. The method conducted in this study follows the stress-based concept of fatigue analysis techniques which considers the level of stresses in the surrounding sheet metal close to the joint. The developed method is applied to the prediction of the fatigue life of LSW in a car body under rough road conditions. A good correlation is confirmed between the prediction and experiment results.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Fatigue Life Prediction Method for Laser Screw Welds in Automotive Structures


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Cheng, Minghuang (Autor:in) / Sawa, Norihiko (Autor:in)

    Kongress:

    SAE 2016 World Congress and Exhibition ; 2016



    Erscheinungsdatum :

    05.04.2016




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Fatigue Life Prediction Method for Laser Screw Welds in Automotive Structures

    Cheng, Minghuang / Sawa, Norihiko | British Library Conference Proceedings | 2016


    Fatigue life prediction method for Laser Screw Welds in automotive structures

    Cheng,M. / Sawa,N. / Toyota Motor,JP | Kraftfahrwesen | 2016


    Fatigue analysis of steel MIG welds in automotive structures

    Potukutchi,R. / Agrawal,H. / Perumalswami,P. et al. | Kraftfahrwesen | 2004


    Fatigue Analysis of Steel MIG Welds in Automotive Structures

    Agrawal, H. / Dong, P. / Perumalswami, P. et al. | SAE Technical Papers | 2004


    Prediction of fatigue properties of laser welds

    Larsson,J.K. / Abulwahab,F. / Volvo,SE | Kraftfahrwesen | 2000