The influence of welding-induced residual stress and distortion on the behaviour of welded, flat-bar stiffened plates under uniaxial compression is examined, using finite-element simulation techniques. Residual stresses and distortions due to welding are simulated by three-dimensional thermo-elasto-plastic finite-element analysis, and the behaviour of stiffened plates under compressive axial loads is evaluated considering various stiffened plate geometries. Welding-induced residual stress and distortion distributions are examined, and the behaviour of stiffened plates under compressive axial loads with and without welding-induced residual stress is compared with International Association of Classification Societies design formulae. Results of the numerical analyses reveal that welding-induced residual stresses reduce the ultimate strength of flat-bar stiffened plates by as much as 18%. Load shortening curves generated by finite-element analysis are compared with curves derived from design formulae, showing good agreement among ultimate strength values predicted by the two methods. There is, however, some discrepancy between the post-ultimate capacities of stiffened plates predicted by the two methods, which may influence the accuracy of ultimate strength calculations for ship hull girders.


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    Title :

    Effect of three-dimensional welding-induced residual stress and distortion fields on strength and behaviour of flat-bar stiffened panels


    Contributors:
    Gannon, Liam (author) / Liu, Yi (author) / Pegg, Neil (author) / Smith, Malcolm J. (author)

    Published in:

    Publication date :

    2013-10-01


    Size :

    14 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English