Fatigue crack growth rate of API X70 steel pipelines under spectrum loading

Beden, S. M.; Abdullah, Shahrum; Ariffin, Ahmad Kamal

doi:10.1016/j.ijpvp.2012.03.001

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…As demonstrated by multiple researches [5,6], processes of wear-out failures of industrial constructions under the influence of combined action of mechanical loadings and corrosive workspaces are caused by a number of physical and chemical localised processes of formation and developement of fissuring troubles in the material [6][7][8]. Besides, alongside with places of enhanced exertion concentration (openings, cuttings, cracks and other technological and constructive exertion raisers), these processes often arise on smooth distorted surfaces, which is due to heterogeneity of their physical and chemical condition [7].…”

Section: Introductionmentioning

confidence: 92%

Peculiarities of corrosion degradation of steel of oil pipelines

Luzhetskyy

2014

EEJET

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Здійснено інженерні оцінки швидкості корозійного руйну-вання нафтопроводів, що враховує як механічні, так і фізи-ко-хімічні параметри взаємодії деформованого металу з робочим середовищем. Визначено характеристики циклічної корозійної тріщиностійкості металу труби експлуатованих нафтопроводів із урахуванням дії експлуатаційних чинників. Встановлено, що водні корозійні середовища суттєво вплива-ють на процес поширення втомної тріщини у досліджуваних сталях Ключові слова: нафтопровід, тріщиноподібний дефект, діаграма циклічної корозійної тріщиностійкості, коефіцієнт інтенсивності напружень Выполнены инженерные оценки скорости коррозионного разрушения нефтепроводов, учитывающие как механические, так и физико-химические параметры взаимодействия дефор-мированного металла с рабочей средой. Определены характе-ристики циклической коррозионной трещиностойкости метал-ла трубы эксплуатируемых нефтепроводов с учетом действия эксплуатационных факторов. Установлено, что водные корро-зионные среды существенно влияют на процесс распростране-ния усталостной трещины в исследуемых сталях Ключевые слова: нефтепровод, трещиноподобный дефект, диаграмма циклической коррозионной трещиностойкости, коэффициент интенсивности напряжений

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Section: Introductionmentioning

confidence: 92%

Peculiarities of corrosion degradation of steel of oil pipelines

Luzhetskyy

2014

EEJET

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“…9 Based on the investigation with the modified Wheeler model and experimental data, the fatigue crack growth of X70 pipeline steels when exposed to different overload values was studied. 10 The underload-induced crack growth behaviour of pipeline steel in near-neutral pH environment was investigated, and the effect of minor cycles with very high stress ratio was discussed. 11 In recent years, some new analytical methods have been proposed to predict the crack growth in pipelines.…”

Section: N O M E N C L a T U R Ementioning

confidence: 99%

“…Substituting Eqs. (10) and (13) into Eqs. (14)-(19), the coefficients A n , B n , C n , D n , M n and N n can be determined.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…Based on the cross‐scale damage processes, a four‐stage probabilistic damage model was proposed to deal with the whole crack damage process from micro‐initiation to macro‐growth of oil pipeline . Based on the investigation with the modified Wheeler model and experimental data, the fatigue crack growth of X70 pipeline steels when exposed to different overload values was studied . The underload‐induced crack growth behaviour of pipeline steel in near‐neutral pH environment was investigated, and the effect of minor cycles with very high stress ratio was discussed …”

Section: Introductionmentioning

confidence: 99%

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Predicting the crack opening displacements of a partially debonded pipeline in rock mass under P waves

Fang

Huang

Liu

2016

Fatigue Fract Eng Mat Struct

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A crack open may lead to the failure because of rupture or leak in the pipeline. In this paper, the dynamic crack opening displacements (CODs) of a partially debonded pipeline subjected to P and SV waves are predicted, and a mathematical model is proposed. The debonded region around the pipeline is modelled as an interface crack with non‐contacting faces. The wave fields in the bonded and debonded areas are expressed by wave function expansion method, and the expanded coefficients are determined by satisfying the boundary conditions with consideration of cracks. The CODs in the debonding area are represented by Chebyshev polynomials. Some examples are illustrated to analyse the CODs under different thicknesses of pipeline and different wave frequencies. In the region of high frequency, the value of CODs is more sensitive to the crack size. The difference between the CODs in the compression direction and shear directions is also examined. Comparison with existing results is given to validate this dynamic model.

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“…At present, the technology for pipeline corrosion detection is relatively mature, while the detection method for stress is still in the research stage, and there is no relevant report on engineering application, and stress is the direct cause of pipeline failure. Under the action of stress, the pipe wall may suffer from yield failure, fatigue cracks [2][3] and stress corrosion cracks [4][5][6] . In the long-term operation of the pipeline, it is easy to form a stress concentration area, and the stress concentration is a potential factor that leads to macroscopic defects such as oil and gas pipeline damage and cracks [7][8] .…”

Section: Introductionmentioning

confidence: 99%

Transient Force-Magnetic Coupling Simulation Research on Pipeline Stress Concentration

Xin

Zhang

et al. 2022

J. Phys.: Conf. Ser.

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The stress concentration of oil and gas pipelines will produce corrosion cracks and axial fatigue cracks under the action of long-term and repeated internal pressure, and will rapidly expand under fluctuating internal pressure, resulting in serious pipeline accidents. In order to effectively detect the stress concentration of oil and gas pipelines, a stress concentration detection technology of unsaturated local magnetization pipeline is proposed. This paper introduces the theoretical basis of local pipeline stress concentration detection, establishes a two-dimensional finite element model of pipeline stress concentration transient force-magnetic coupling, and analyzes the influence of excitation source position, sensor lift-off value, and stress concentration value on the response signal. The simulation results show that the corresponding signal B x of the stress concentration changes more obviously than B y and the signal is regular, Bx has a good two-stage linear positive correlation with the stress concentration value. The above research provides technical support for the development of pipeline on-line stress concentration detection probe.

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Fatigue crack growth rate of API X70 steel pipelines under spectrum loading

Cited by 10 publications

References 24 publications

Peculiarities of corrosion degradation of steel of oil pipelines

Peculiarities of corrosion degradation of steel of oil pipelines

Predicting the crack opening displacements of a partially debonded pipeline in rock mass under P waves

Transient Force-Magnetic Coupling Simulation Research on Pipeline Stress Concentration

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