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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ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
June 15–20, 2008
Estoril, Portugal
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4819-7
PROCEEDINGS PAPER
Anaylsis of Ductile Fracture Initiation in Corroded Plates
Weiwei Yu,
Weiwei Yu
University of Michigan, Ann Arbor, MI
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Hyun Chung,
Hyun Chung
University of Michigan, Ann Arbor, MI
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Dale G. Karr
Dale G. Karr
University of Michigan, Ann Arbor, MI
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Weiwei Yu
University of Michigan, Ann Arbor, MI
Ge Wang
American Bureau of Shipping, Houston, TX
Hyun Chung
University of Michigan, Ann Arbor, MI
Dale G. Karr
University of Michigan, Ann Arbor, MI
Paper No:
OMAE2008-57466, pp. 431-440; 10 pages
Published Online:
July 27, 2009
Citation
Yu, W, Wang, G, Chung, H, & Karr, DG. "Anaylsis of Ductile Fracture Initiation in Corroded Plates." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 2: Structures, Safety and Reliability. Estoril, Portugal. June 15–20, 2008. pp. 431-440. ASME. https://doi.org/10.1115/OMAE2008-57466
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