Corrosion of marine structures often compromises structural integrity by reducing fracture elongation and strength, yield and ultimate strength, and fatigue life. When localized or pitting corrosion occurs, strength reduction can be difficult to establish because the effects of uneven surfaces affect the stress fields and failure modes of the structure. We examine in this paper the effects of corrosion on the ductile fracture of steel plating. Defects in material are known to affect the strain-to-failure of ductile metals. Such effects are included in the analyses presented for thin plates subjected to axial stress with local geometric defects caused by corrosion. A strain-to-failure criterion is used for predicting ductile fracture of the plating. Results of fracture strain reduction for particular corrosion states are presented for common ship hull steel. The reduction in strain to failure is shown to be dependent on the size of the elements considered as well as the pitted plate geometry.

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