Experimental and Numerical Analyses of Fatigue Behavior of Welded Cruciform Joints

    Volume 7, Issue 4 (April 2010)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 16 April 2010

    Page Count: 15


    Erny, C.
    Laboratoire Brestois de Mécanique et des Systèmes (LBMS)DCNS Ingénierie Navires Armés, rue Choiseul, Brest Cedex 9Lorient Cedex,

    Thévenet, D.
    Laboratoire Brestois de Mécanique et des Systèmes, Brest Cedex 9,

    Cognard, J. Y.
    Laboratoire Brestois de Mécanique et des Systèmes, Brest Cedex 9,

    Korner, M.
    DCNS Ingénierie Navires Armés, rue Choiseul, Lorient Cedex,

    (Received 19 May 2009; accepted 2 March 2010)

    Abstract

    Ship structures are commonly assembled by using welding process. Due to the swell, all ships are submitted to some variable and complex loadings. The welding process creates specific geometries at the weld toe where local stress concentrations are generated and also creates various mechanical properties in the heat affected zone. Accordingly, welded joints could be a critical area for fatigue damage. In a previous work, a methodology to predict fatigue life has been developed and tested on butt-welded joints. To go further, the present work focuses on more complex assemblies in order to validate this strategy and be able to estimate the fatigue life of representative naval structures. First, the methodology consists of the elastic shakedown study and then of a post-treatment which predicts the fatigue crack initiation. A comparison between experimental and numerical results is proposed in order to present the accuracy of the proposed strategy to predict fatigue life time of welded assemblies typical of shipbuilding applications.


    Paper ID: JAI102535

    DOI: 10.1520/JAI102535

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    Author
    Title Experimental and Numerical Analyses of Fatigue Behavior of Welded Cruciform Joints
    Symposium Ninth International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (37th ASTM National Symposium on Fatigue and Fracture Mechanics), 2009-05-22
    Committee E08