Influence of pitting corrosion on the fatigue strength of offshore steel structures based on 3D surface scans
Source abstract
Abstract
Support structures for offshore wind turbines and the corresponding transformer platforms are highly susceptible to corrosion. In particular, the phenomenon of pitting is crucial, as it leads to local stress concentrations and thus affects the fatigue life of structures. Despite corrosion protection systems, corrosion cannot be completely avoided, which can lead to pitting corrosion on the steel surface. This leads to fatigue life reduction, since the structures are exposed to high dynamic loads. Local stress concentrations can be considered in local concepts but so far, corrosion effects in local concepts are insufficiently defined. Hence, this paper aims to investigate the impact of pitting corrosion and the corresponding stress concentration on the fatigue life endurance of structural steel, used for offshore wind support structures. For this purpose, a total of 36 pre-corroded specimens with pitting were tested against fatigue failure and monitored with Digital Image Correlation. In addition, the specimens were scanned with a high-resolution 3D scanner and converted to numerical models by reverse engineering, to determine the stress concentrations on the surface. In most cases the hotspots from the numerical model coincide with the crack location detected with Digital Image Correlation. The notch effect has a significant impact on the crack location and crack path.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Structural Integrity and Reliability Analysis · Fatigue and fracture mechanics · Concrete Corrosion and Durability
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (56)
Show source-provided references
1. Det Norske Veritas. Corrosion protection for wind turbines(DNV-GL RP-0416); 2016.
2. Federal Maritime and Hydrographic Agency. Minimum requirements concerning the constructive design of offshore structures within the Exclusive Economic Zone (EEZ); 2015.
3. International Standards Organization. Corrosion of metals and alloys — Corrosivity of atmospheres: Classification, determination and estimation(ISO 9223:2012); 2012.
4. Det Norske Veritas. Support structures for wind turbines(ST-0126); 2018.
5. Corrosion pit-induced stress concentration in spherical pressure vessel10.1016/j.tws.2018.12.014 ↗
6. Investigation of the mechanical properties of steel plates with artificial pitting and the effects of mutual pitting on the stress concentration factor10.1016/j.rinp.2019.102520 ↗
7. Probabilistic modelling of pitting corrosion and its impact on stress concentrations in steel structures in the offshore wind energy10.1016/j.marstruc.2022.103232 ↗
8. Corrosion-fatigue: a review of damage tolerance models10.1080/09506608.2017.1375644 ↗
9. Analysis on the stress corrosion crack inception based on pit shape and size of the FV520B tensile specimen10.1016/j.rinp.2018.03.005 ↗
10. Quantitative correlation between geometric parameters and stress concentration of corrosion pits10.1016/j.engfailanal.2014.05.020 ↗
11. Numerical investigation on stress concentration of tension steel bars with one or two corrosion pits
12. Radaj D, Sonsino CM, Fricke W. Fatigue assessment of welded joints by local approaches. 2nd ed. Cambridge: Woodhead Publ. [u.a.]; 2006.10.1533/9781845691882 ↗
13. Radaj D, Vormwald M. Advanced methods of fatigue assessment. Heidelberg: Springer; 2013.10.1007/978-3-642-30740-9 ↗
14. Hobbacher A. Recommendations for fatigue design of welded joints and components. IIW Document No. IIW-1823-07 International Institute of Welding; 2009.
15. Fricke W. IIW recommendations for the fatigue assessment of welded structures by notch stress analysis. Oxford: WP Woodhead Publ; 2012.10.1533/9780857098566 ↗
16. Notch stress concepts for the fatigue assessment of welded joints – Background and applications10.1016/j.ijfatigue.2010.04.011 ↗
17. The strain-life approach applied to welded joints: Considering the real weld geometry10.1016/j.jcsr.2018.04.024 ↗
18. A numerical method for determining the fatigue strength of welded joints with a significant improvement in accuracy10.1016/j.proeng.2018.02.036 ↗
19. Application of local approaches to the assessment of fatigue test results obtained for welded joints at sub-zero temperatures10.1016/j.ijfatigue.2020.105672 ↗
20. Automatically welded tubular X-joints for jacket substructures: prediction of the technical fatigue crack location10.1002/cepa.1140 ↗
21. European Committee for Standardization. Eurocode 3 - Design of steel structures - Part 1-9: Fatigue(EN 1993-1-9); 2020.
22. Det Norske Veritas - Germanischer Llyod. Fatigue design of offshore steel structures(DNV-GL RP-C203); 2019.
23. Deutsches Institut für Normung e.V. Structures for wind turbines and platforms - Part 3: Steel structures(DIN 18088-3); 2019.
24. Det Norske Veritas. Fatigue Assessment of Ship Structures(Classification Notes No. 30.7); 2014.
25. Health & Safety Executive. Background to new fatigue guidance for steel joints and connections in offshore structures(OTH 92 390); 1998.
26. Bundesanstalt für Wasserbau. Merkblatt: Bewertung der Tragfähigkeit bestehender Verschlüsse im Stahlwasserbau (TbVS); 2018.
27. British Standards Institution. Guide to fatigue design and assessment of steel products(BS 7608:2014+A1:2015); 2014.
28. A data-based model for condition monitoring and maintenance planning for protective coating systems for wind tower structures10.1016/j.renene.2022.01.022 ↗
29. A review of trends for corrosion loss and pit depth in longer-term exposures10.3390/cmd1010004 ↗
30. Revie RW, Uhlig HH. Corrosion and corrosion control: An introduction to corrosion science and engineering. Hoboken, New Jersey: Wiley-Interscience a John Wiley & Sons Inc. Publication; 2008.10.1002/9780470277270 ↗
31. Marcus P. Corrosion mechanisms in theory and practice. 3rd ed. Boca Raton, Fla.: CRC Press; 2012.
32. Le Li, Mojtaba Mahmoodian, Chun-Qing Li, Dilan Robert. Effect of corrosion and hydrogen embrittlement on microstructure and mechanical properties of mild steel.
33. Fatigue crack growth rates for offshore wind monopile weldments in air and seawater: SLIC inter-laboratory test results10.1016/j.matdes.2016.10.070 ↗
34. Digital image correlation for continuous mapping of fatigue crack initiation sites on corroded surface from offshore mooring chain10.1016/j.ijfatigue.2021.106350 ↗
35. Neumann KM, Ehlers S. Power spectrum for surface description of corroded ship structure from laser scan. In: Structures, safety, and reliability: Presented at ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, June 9-14, 2019, Glasgow, Scotland, UK. New York, NY: The American Society of Mechanical Engineers; 2019.10.1115/OMAE2019-95907 ↗
36. Probability analysis of PIT distribution on corroded ballast tank10.1016/j.oceaneng.2021.108958 ↗
37. G01 Committee. Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens. West Conshohocken, PA: ASTM International. 10.1520/G0001-03R17E01.
38. Biglu M. Doctoral Thesis - Effects of corrosion on the local behavior of steel structures under tensile loading.
39. Crack monitoring in resonance fatigue testing of welded specimens using digital image correlation
40. Radaj D, Vormwald M. Ermüdungsfestigkeit: Grundlagen für Ingenieure. 3rd ed. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg; 2007.
41. Fatigue crack initiation and propagation relation of notched specimens with welded joint characteristics10.3390/met12040615 ↗
42. ECCS European Convention for Constructional Steelwork. Background information on fatigue design rules: Statistical evaluation. 2nd ed. Brussels: ECCS European Convention for Constructional Steelwork; 2018.
43. Experimental investigation on the influence of welding residual stresses on fatigue for two different weld geometries
44. Feasibility of digital image correlation for detection of cracks at fastener holes10.1016/j.ndteint.2008.10.008 ↗
45. Fatigue Behavior of Automatically Welded Tubular Joints for Offshore Wind Energy Substructures
46. Shojai, Sulaiman; Schaumann, Peter; Brömer, Tim (2022): Probabilistic modelling of pitting corrosion and its impact on stress concentrations in steel structures in the offshore wind energy. In: Marine Structures 84, S. 103232. DOI: 10.1016/j.marstruc.2022.103232.10.1016/j.marstruc.2022.103232 ↗
47. The exponential law of endurance tests
48. Deutsches Institut für Normung e.V. Load controlled fatigue testing – Execution and evaluation of cyclic tests at constant load amplitudes on metallic specimens and components(DIN 50100:2016-12). Berlin: Beuth Verlag GmbH; 2016.
49. Murakami Y. Metal fatigue: Effects of small defects and nonmetallic inclusions. Amsterdam, London, San Diego, CA: Academic Press an imprint of Elsevier; 2019.
50. Initiation and growth rates of short fatigue cracks
51. Propagation of short fatigue cracks10.1179/imr.1984.29.1.445 ↗
52. Ermüdungsfestigkeit von Stumpfnahtverbindungen größerer Blechdicke gefügt mit Hochleistungsschweißverfahren
53. Simulation of stress-assisted localised corrosion using a cellular automaton finite element approach10.1016/j.corsci.2018.03.029 ↗
54. New insight into the pit-to-crack transition from finite element analysis of the stress and strain distribution around a corrosion pit10.1016/j.corsci.2009.12.004 ↗
55. Taylor D. The theory of critical distances: A new perspective in fracture mechanics. Amsterdam, London: Elsevier; 2010.
56. A gradient-based multiaxial criterion for fatigue crack initiation prediction in components with surface roughness10.1016/j.ijfatigue.2018.08.020 ↗