Experimental and analytical investigation of fatigue characteristics of 350WT steel under constant and variable amplitude loadings

Taheri‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬, Farid; Trask, D.; Pegg, Neil

doi:10.1016/s0951-8339(02)00004-7

Cited by 92 publications

(62 citation statements)

References 16 publications

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“…where the value of η is established to be equal to 3 through the analysis [16]. The predicted crack increments under overload effects are 100 μm, which is much smaller than the experimental value.…”

Section: Resultsmentioning

confidence: 89%

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Investigation of fatigue crack growth under loading sequence effects using in-situ SEM testing

et al. 2018

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Abstract. Fatigue damage is one of the most important failure mechanisms in engineering components. The excited structures are usually subjected to spike loads in the fatigue weakness area during their service lives. The nonlinear loading sequence effects due to overloads are significant in the crack propagation process. In this paper, an in-situ scanning electron microscope (SEM) testing is performed to analyse the mechanisms of nonlinear fatigue crack growth affected by the load sequence. The crack tip behaviours under constant amplitude loading cycles superimposed by tensile overload were observed. The SEM experiment results reveal that the overload effects include the transient weakened area (shear bands and micro-cracks) and the relatively long-term retardation. Additionally, the observation loading sequence influence region is larger than the theoretical value. According to these SEM testing analyses, the Willenborg is modified considering the nonlinear loading sequence effects. In this approach, the damage zone concept is introduced to account for the instantaneous acceleration. Moreover, the loading sequence effect area is defined as the whole plastic zone due to overload rather than part of it. The proposed algorithm is validated by experiment data of 350WT steel and Al 2024-T351 specimens under constant loading with overloads. Good agreements are observed.

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Section: Resultsmentioning

confidence: 89%

“…An experimental fatigue program was conducted by Taheri et al [16]. The crack growth data on 350WT steel under CA loading with overloads are collected, which are used to validation the proposed model.…”

Section: Crack Growth Prediction In 350wt Under Constant Loading Withmentioning

confidence: 99%

Investigation of fatigue crack growth under loading sequence effects using in-situ SEM testing

et al. 2018

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“…This method of approximation is characterized with the following properties that in some cases may be considered as disadvantages (Forman et al, 2005;White et al, 2005;Huang et al, 2005;Taheri et al, 2003):…”

Section: Discussionmentioning

confidence: 99%

Good Practice for Fatigue Crack Growth Curves Description

Kłysz¹,

Leski²

2012

Applied Fracture Mechanics

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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: 99%

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

show abstract

Experimental and analytical investigation of fatigue characteristics of 350WT steel under constant and variable amplitude loadings

Cited by 92 publications

References 16 publications

Investigation of fatigue crack growth under loading sequence effects using in-situ SEM testing

Investigation of fatigue crack growth under loading sequence effects using in-situ SEM testing

Good Practice for Fatigue Crack Growth Curves Description

Peculiarities of corrosion degradation of steel of oil pipelines

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