Automotive manufacturers typically use resistance spot welding (RSW) for their automotive body sheet metal assembly. RSW offers a number of advantages over other sheet-metal-joining techniques, including high speed, ease of automation, and energy efficiency. However, one of the major concerns of spot weld joints is fatigue. Recently, a fatigue enhancement process for resistance spot welds, namely a post-weld cold-working process, has been introduced and has given significant improvement in fatigue lives of resistance spot welds. The post-weld cold-working process imparts compressive residual stresses around the joint, which can benefit the fatigue strength. This paper presents experimental and numerical investigations on the use of the post-weld cold-working process to improve the fatigue strength of low-carbon steel resistance spot welds. The effect of the post-weld cold-working process parameters on fatigue strength is investigated and the optimum process condition is proposed. In addition, a finite element analysis is carried out to evaluate the residual stress distribution after cold working.


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    Titel :

    Fatigue enhancement of post-weld cold-worked low-carbon steel resistance spot welds


    Beteiligte:
    Kim, D-W (Autor:in) / Blake, D (Autor:in) / Kim, B-J (Autor:in) / Kim, M-H (Autor:in) / Lim, B-S (Autor:in)


    Erscheinungsdatum :

    01.09.2008


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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