Strength assessment of a stiffened panel based on the modified stress curve approach

In order to account for the weld induced stresses, a method was proposed by Faulkner (1977), which further was updated and adopted for the analysis presented here. This method accounts for the residual stresses by implementing a modification in the elastic perfectly plastic stress-strain curve. Through this type of stress-strain curve, the structure is subjected to premature yielding and in turn reduces both stiffness and strength.