Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural model

Balbín, J.A.; Chaves, V.; Larrosa, Nicolas

doi:10.1016/j.corsci.2020.109171

Cited by 26 publications

(3 citation statements)

References 53 publications

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“…For instance, findings by Aman et al 47,55 showed that small or non‐propagating cracks emanating from adjacent defects (drilled holes) can coalesce into a larger single crack and result in decrease in the remaining fatigue life. Also, the micromechanical model developed by Balbin et al 68 can also be applied to the crack growth data to investigate the role of mechanical interaction in the propagation of cracks emanating from pits.…”

Section: Discussionmentioning

confidence: 99%

The influence of corrosion pit–pit spacing on the pit‐to‐crack transition and fatigue lifetime

Fatoba

Akid

2022

Fatigue Fract Eng Mat Struct

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The influence of separation distance between pre-induced corrosion pits on both crack initiation and fatigue lifetimes is studied in an air environment by testing specimens containing pit pairs in the low-stress, high cycle fatigue regime. The results of these tests are compared with equivalent tests with samples containing similar sized single pit. Within the scope of pit sizes and separation distances investigated, when the separation distance is below a threshold, decreasing the separation distance between pits leads to earlier onset of crack initiation and decreased fatigue lifetimes; this threshold being dependent on the applied stress and relative pit sizes. When the separation distance is above this threshold, multiple pits tend to behave independently of each other. The implication of the results from the viewpoint of structural integrity assessment of components containing flaws such as corrosion pits in close proximity is discussed.

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Section: Discussionmentioning

confidence: 99%

The influence of corrosion pit–pit spacing on the pit‐to‐crack transition and fatigue lifetime

Fatoba

Akid

2022

Fatigue Fract Eng Mat Struct

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“…5,6 Fatigue assessment factors such as defects caused by welding, oscillating stresses due to environmental loads, high stress concentrations at the intersection, and pits from corrosion due to seawater have been studied. [7][8][9][10][11] OWT monopiles are joined with V-shaped butt welds on both sides. The welding quality can significantly affect the fatigue performance of OWT monopiles as cyclic stresses at the welds can initiate fatigue cracks, particularly in the heat-affected zone (HAZ).…”

Section: Introductionmentioning

confidence: 99%

“…OWT monopiles are often constructed from welded hot‐rolled structural steel plates, and their fatigue performance has been reported to be superior compared to normalized offshore steel 5,6 . Fatigue assessment factors such as defects caused by welding, oscillating stresses due to environmental loads, high stress concentrations at the intersection, and pits from corrosion due to seawater have been studied 7–11 . OWT monopiles are joined with V‐shaped butt welds on both sides.…”

Section: Introductionmentioning

confidence: 99%

Corrosion surface morphology‐based methodology for fatigue assessment of offshore welded structures

Okenyi,

Afazov,

Mansfield

et al. 2023

Fatigue Fract Eng Mat Struct

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This work employed a novel corrosion‐based fatigue model to determine the fatigue life of offshore welded structures to enable the fatigue assessment of welds under corrosive conditions. In addition to the material's ultimate strength, endurance limit, and stress ratio (mean stress effect), the model includes a corrosion factor concept to account for the impact of corrosion pits on the fatigue performance of welded S355 steel, which is the novel contribution in this paper. X‐ray computed tomography scans of corroded S355 specimens in a salt spray chamber were characterized. Surface texture characterization was employed to obtain surface roughness, size, and aspect ratio of corrosion pits. The corrosion factor was determined based on notch and surface fatigue theories using the characterized pit size, aspect ratio, and surface roughness. Fatigue S‐N curves were then predicted for critical pits and compared against the fatigue code DNVGL‐RP‐C203 and experimental data from the literature. The novel approach combining corrosion characterization method with corrosion‐based fatigue model for the prediction of fatigue S‐N curves provided a minor deviation of only 2.8% between predicted and measured data. This approach can potentially be integrated into predictive frameworks for the remaining life assessment of offshore structures.

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On the Minimum Required Sampling Frequency for Reliable Fatigue Lifetime Estimation in Structural Health Monitoring. How Much is Enough?

D’Antuono

Weijtjens

Devriendt

2022

Lecture Notes in Civil Engineering

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Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural model

Cited by 26 publications

References 53 publications

The influence of corrosion pit–pit spacing on the pit‐to‐crack transition and fatigue lifetime

The influence of corrosion pit–pit spacing on the pit‐to‐crack transition and fatigue lifetime

Corrosion surface morphology‐based methodology for fatigue assessment of offshore welded structures

On the Minimum Required Sampling Frequency for Reliable Fatigue Lifetime Estimation in Structural Health Monitoring. How Much is Enough?

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