Remaining fatigue life assessment of aging fixed steel offshore jacket platforms

Zeinoddini, M.; Ranjbar, Pooya; Khalili, Hadi; Ranaei, Alireza; Golpour, Hamid; Fakheri, Javad

doi:10.1080/15732479.2015.1009122

Cited by 24 publications

(2 citation statements)

References 2 publications

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“…The resulting pits become wide and shallow or narrow and deep which can potentially perforate the wall thickness of a metal. It is essential to assess the impact of such pitting corrosion damage accurately for monitoring, damage mitigation and life extension of such members [6][7][8]. A comprehensive review in this area [9] indicated that the structural behaviour due to pitting features such as pit depth, pit density and interfacial distances between pits is still not fully understood.…”

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confidence: 99%

Experimental and numerical study on ultimate strength of steel tubular members with pitting corrosion damage

Wang

Shenoi

2019

Marine Structures

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Pitting corrosion can cause stress concentration and early onset of plasticity in the metallic structural components. This paper presents a comprehensive experimental and numerical study on the effect of pitting features such as pit shape and depth, pitting distribution and intensity on the structural performance of steel tubular members. The experimental investigations were carried out on tubular members with mechanically drilled pitting damage under axially loaded compression condition. The test results were applied to validate finite element (FE) models by comparing the load-shortening curves, ultimate loads and failure modes. The validated FE models were then used to simulate the random nature of pitting damage in terms of stochastic simulation. The results from the stochastic analyses show that random natures associated with pit shape, pit depth and pitting distribution can result in a great reduction and variation of ultimate strength, likely causing the transition of collapse mode. The experiments provide a modelling benchmark to validate FE models of the tubular structures with random pitting corrosion for the ultimate strength assessment. The developed FE models are shown to be capable of replicating the pitted tubular members.

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confidence: 99%

Experimental and numerical study on ultimate strength of steel tubular members with pitting corrosion damage

Wang

Shenoi

2019

Marine Structures

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“…Sanderson [26,27] emphasized that significant SCC effects were found for Ti-6Al-4V alloy in pure methanol and methanol-HCl solutions if considering the results of u-shaped specimens. Therefore, an accurate assessment of this corrosion process is needed to mitigate damage to alloyed components [28,29].…”

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confidence: 99%

Corrosion–Resistance Mechanism of TC4 Titanium Alloy under Different Stress-Loading Conditions

et al. 2022

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Titanium alloys have now become the first choice of tubing material used in the harsh oil- and gas-exploitation environment, while the interaction of force and medium is a serious threat to the safety and reliability of titanium alloy in service. In this paper, different stresses were applied to TC4 titanium alloy by four-point bending stress fixture, and the corrosion behavior of TC4 titanium alloy was studied by high-temperature and high-pressure simulation experiments and electrochemical techniques, and the microscopic morphologies and chemical composition of the surface film layer on the specimen were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), to reveal the corrosion-resistance mechanism of TC4 titanium alloy under different stress-loading conditions. The results showed that the pits appeared on the specimens loaded with elastic stress, but the degree of pitting corrosion was still lighter, and the surface film layer showed n-type semiconductor properties with cation selective permeability. While the pits on the specimens loaded with plastic stress were deeper and wider in size, and the semiconductor type of the surface film layer changed to p-type, it was easier for anions such as Cl− and CO32− to adsorb on, destroy, and pass through the protective film and then to contact with the matrix, resulting in a decrease in corrosion resistance of TC4 titanium alloy.

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Sensitivity analysis of simple methods in determination of offshore jacket structures levels stiffness

Tabeshpour

Ahmadi

2021

J Mar Sci Technol

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Remaining fatigue life assessment of aging fixed steel offshore jacket platforms

Cited by 24 publications

References 2 publications

Experimental and numerical study on ultimate strength of steel tubular members with pitting corrosion damage

Experimental and numerical study on ultimate strength of steel tubular members with pitting corrosion damage

Corrosion–Resistance Mechanism of TC4 Titanium Alloy under Different Stress-Loading Conditions

Sensitivity analysis of simple methods in determination of offshore jacket structures levels stiffness

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