Abstract
AbstractWith the increasing demand for lightweight ships, marine alloy materials such as aluminum alloy and titanium alloy are widely used; 5059 aluminum alloy is considered as an ideal steel for hull structure because of its good mechanical properties and corrosion resistance. The influence of welding residual stress and welding deformation must be considered in fatigue evaluation of thin‐plate welded structures. However, due to the more complex welding deformation and residual stress distribution of thin‐plate welded structures, the fatigue evaluation of thin‐plate welded structures is challenged. In this paper, a series of fatigue tests of actual reinforced T‐shaped welded joints are carried out, and the accurate welding deformation and residual stress are obtained by numerical simulation. Finally, taking welding deformation and residual stress as initial conditions, the hot spot stress S‐N curves of typical joints are modified by hot spot stress method.
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