The use of high-strength aluminium alloys in marine construction has certainly obtained many benefits, particularly for building fast ferries and also for military purposes. It is commonly accepted that the collapse characteristics of aluminium structures are similar to those of steel structures until and after the ultimate strength is reached, regardless of the differences between them in terms of material properties. However, it is also recognized that the ultimate strength design formulas available for steel panels cannot be directly applied to aluminium panels even though the corresponding material properties are properly accounted for. This is partly due to the fact that the stress versus strain relationship of aluminium alloys is different from that of structural steel. That is, the elastic-plastic regime of material after the proportional limit and the strain hardening plays a significant role in the collapse behavior of aluminium structures, in contrast to steel structures where the elastic perfectly plastic material model is well adopted. Also, the softening in the heat-affected zone significantly affects the ultimate strength behavior of aluminium structures, whereas it can normally be neglected in steel structures. In this paper, the ultimate strength characteristics of aluminium plates and stiffened panels under axial compressive loads are investigated through ANSYS elastic-plastic large deflection finite element analyses with varying geometric panel properties. An average level of welding-induced softening and initial imperfections is assumed for the analyses. Closed-form ultimate compressive strength formulas for aluminium plates and stiffened panels are derived by regression analysis of the computed results.


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    Titel :

    Ultimate strength of aluminum plates and stiffened panels for marine applications


    Beteiligte:
    Paik, Jeom Kee (Autor:in) / Duran, Alexandre (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2004


    Format / Umfang :

    14 Seiten, 23 Bilder, 2 Tabellen, 13 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch






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