On the problem of quantitative service life assessment for high-strength steel welded structures under the effect of corrosion medium

Ilyin, A. V.; Filin, V. Yu.

doi:10.1016/j.prostr.2019.07.078

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Compared with ordinary structural steel, high-strength steel has obvious advantages in terms of strength, ductility, weldability, and structural mechanical performance. The theoretical and experimental research on the mechanical properties and stability of welded structures made of high-strength steel has become a hot topic [ 1 , 2 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Research on Residual Stress of a BS700 Butt-Welded Box Section and Its Influence on the Stability of Axial Compression Members

et al. 2020

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BS700 high-strength steel is widely used in engineering. Welding residual stress during the manufacturing process has a significant influence on the structural safety and service life of steel structures. In this study, the residual stress of a BS700 butt-welded box section axial compression member was studied by the blind-hole method, its distribution law was summarized, and a residual stress distribution model was established. By establishing a finite element model considering initial geometric imperfection and residual stress, the influence of residual stress on the stability of axial compression members was analyzed. The results illustrated that the residual tensile stress near the weld in the welded box section axial compression members was the largest: the average residual tensile stress reached 76.6% of the measured steel yield strength, the residual tensile stress at the roof and web were almost the same, and the residual tensile stress at the corner was approximately 11.6% of the measured yield strength. The residual stress had a different influence on the stability factor of the axial compression members with different width-thickness ratios, and the influence decreased with the increase in the width-thickness ratio. In addition, when the slenderness ratio of members ranged between 20 and 70, the residual stress had a significant influence on the stability of members, while outside that interval, the influence was relatively small.

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Section: Introductionmentioning

confidence: 99%

Research on Residual Stress of a BS700 Butt-Welded Box Section and Its Influence on the Stability of Axial Compression Members

et al. 2020

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“…Анализ, проведенный в работах [1][2][3][4][5], показал, что условия работы металла и сварных соединений в листовых конструкциях наиболее полно воспроизводятся при испытании методом гидростатического выпучивания. В этом случае образец закрепляется либо опирается по контуру и нагружается гидростатическим давлением.…”

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“…Схемы нагружения образцов для получения в них двухосного поля напряжений:а -нагружение плоского образца с равными компонентами напряжений; б -нагружение сферического сегмента; в -нагружение образца в виде цилиндрической панели Дальнейшее уменьшение отношения σ 2 /σ 1 = (0,7… 0,3) достигается с помощью схемы, показанной на рис. 1 в, где гидростатическим давлением нагружается образец в виде цилиндрической панели, защемленной фланцевой частью между цилиндрической матрицей и цилиндрическим пуансоном[3,4]. Для листовых конструкций, работающих под давлением, характерны два типа нагружения: однократное (статическое) и малоцикловое (повторно-статическое).…”

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Methods and Equipment for Experimental Evaluation of the Performance of Shell and Hull Structures

Lyudmirsky

Assaulenko

Kramskoi³

2022

Vestnik Donskogo gosudarstvennogo tehničeskogo universiteta

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Introduction. Pressure-operated thick-walled hull structures are the most common type of high-duty welded structures. When these structures are loaded with internal pressure, a complex biaxial stress field arises in them, which is summed up with the fields of residual welding stresses. Therefore, when selecting a technology for manufacturing critical welded structures, the results obtained during conventional uniaxial tests of samples are insufficient. The variety of factors affecting the performance of structures, and the difficulties of separate assessment of their influence, caused the need to maximize the approximation of experimental conditions to the real working conditions of the structure.Materials and Methods. Testing of full-scale structures has a number of advantages, but they are extremely expensive, and, as a rule, only one, the weakest link, is identified, the bearing capacity of the other structural elements remains unclear. For testing, UDI radiometric installations designed for different sample sizes were used. The presented installations allow testing samples of various shapes, types of welded joints (butt, T-bar), changing the position of welded parts.Results. Without rejecting the results obtained during the testing of full-scale structures in the works of the Bauman Moscow State Technical University, DSTU, NRC «Kurchatov Institute» – CRISM «Prometey», and the authors proposed to conduct the basic scope of the research on individual structural elements that would reflect the characteristic features of loading, manufacturing technology, and operating conditions. The design of the «fitting-sheet» connections was applied, which made it possible to increase the indicators of the failure initiation and propagation to the level of the base metal.Discussion and Conclusions. Schemes of structures for obtaining a biaxial tension or bending field in samples were presented. Samples tested according to the proposed schemes allowed us to draw conclusions about the performance of welded joints under conditions close to the actual operation of the structures under study. The proposed test scheme is used by research laboratories in our country and around the world.

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Corrosion behavior and microstructure analysis of butt welds of Q690 high strength steel in simulated marine environment

Wei,

Tang,

Chen

et al. 2024

Journal of Building Engineering

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On the problem of quantitative service life assessment for high-strength steel welded structures under the effect of corrosion medium

Cited by 4 publications

References 4 publications

Research on Residual Stress of a BS700 Butt-Welded Box Section and Its Influence on the Stability of Axial Compression Members

Research on Residual Stress of a BS700 Butt-Welded Box Section and Its Influence on the Stability of Axial Compression Members

Methods and Equipment for Experimental Evaluation of the Performance of Shell and Hull Structures

Corrosion behavior and microstructure analysis of butt welds of Q690 high strength steel in simulated marine environment

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