In this paper an investigation is presented based on numerical modeling of locally corroded tubular members. A parametric finite element approach was used in order to simulate behavior of damaged members under axial compressive loads. The results were then examined against an available experimental test. Validated models are used to derive a semi-empirical formula for predicting ultimate strength of locally damaged tubes as a function of corrosion dimensions.
Geometry of corrosion can be defined by its depth, length, width and location of damage along the tube. In this study it is focused on the effect of some parameters that have not been addressed yet by other researchers, e.g. slenderness of the tubes and location of patch corrosion.
It was found that location of corrosion has great effect on reduction of ultimate strength. Effect of corrosion geometry was also studied and it was shown that tubes with different corrosion dimensions show different behaviors under compressive loads.
In cases with severe corrosion damages, the occurrence of local buckling plays an important role on reduction of ultimate strength and deformation of damaged region.
The effect of tubular slenderness on behavior of axially compressed tubes was also studied and formulated.