Fracture Assessment of Cracked Welded Structures Considering the Heterogeneity of Welded Joints

Moskvichev, E. V.

doi:10.1016/j.mspro.2014.06.092

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…Согласно алгоритму конечно-элементные модели сварных соединений учитывают стохастический характер распределения механических свойств в различных зонах сварного шва. Материал сварного соединения представляется совокупностью малых структурных элементов со случайными значениями предела текучести и временного сопротивления, изменяющимися в различных зонах сварного шва согласно некоторому закону распределения [19,20]. Таким образом, каждый структурный элемент сварного соединения обладает собственной диаграммой деформирования.…”

Section: описание информационно-аналитической системыunclassified

Information and analytical tools for assessing the structural survivability and safety of technological equipment

Reizmunt¹,

Doronin²,

Moskvichev³

2021

DREAM

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The tasks of information and computational support for the analysis of the survivability and safety of power shells of technical objects are formulated, aimed at studying their properties taking into account damages and abnormal effects. To solve them, algorithms and computational tools have been developed, aimed at analyzing damage and assessing the risk of re-occurrence of accidents at technical objects, modeling the structural and mechanical heterogeneity of welded joints and calculating their crack resistance, parametric modeling of welded joints with defects, analyzing the sensitivity of structures to defects, damages, and off-design effects, and evaluating their survivability and safety. Information support has been developed, which contains a systematic list of factors reducing survivability and safety, the results of experimental studies of the crack resistance of welded joints and the survivability of shells with a developing macrocrack, as well as the accumulated results of solving model and applied problems on analyzing the properties of damaged shell structures, as reference data.

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Section: описание информационно-аналитической системыunclassified

Information and analytical tools for assessing the structural survivability and safety of technological equipment

Reizmunt¹,

Doronin²,

Moskvichev³

2021

DREAM

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“…In the conventional evaluation of the safe operation of defect-free structures, the applied stresses are compared to a limit stress, such as the yield strength of the material. When damage in the form of a crack is present, the assessment of welded joints is based on the evaluation of the stress intensity factor, the J-integral and the crack tip opening displacement (CTOD) [ 2 ]. On the other hand, the influence of mechanical heterogeneity on the fracture behavior of welds is not explicitly included in the mentioned fracture mechanics parameters.…”

Section: Introductionmentioning

confidence: 99%

Yield Load Solutions for SE(B) Fracture Toughness Specimen with I-Shaped Heterogeneous Weld

et al. 2021

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The objective of this work was to investigate the fracture behavior of a heterogeneous I-shaped welded joint in the context of yield load solutions. The weld was divided into two equal parts, using the metal with the higher yield strength and the metal with the lower yield strength compared to base metal. For both configurations of the I-shaped weld, one with a crack in strength in the over-matched part of the weld and one for a crack in the under-matched part of the weld, a systematic study of fracture toughness SE(B) specimen was carried out in which the crack length, the width of the weld and the strength mismatch factor for both weld metals were varied, and the yield loads were determined. As a result of the study, two mathematical models for determination of yield loads are proposed. Both models were experimentally tested with one strength mismatch configuration, and the results showed good agreement and sufficiently conservative results compared to the experimental results.

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Fracture Mechanics Based Assessment of a Pressure Vessel Using R6 Procedure

Srinivasan,

Prakashan,

Anandavally Parameswaran

et al. 2023

Trans Indian Inst Met

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Fracture Assessment of Cracked Welded Structures Considering the Heterogeneity of Welded Joints

Cited by 5 publications

References 2 publications

Information and analytical tools for assessing the structural survivability and safety of technological equipment

Information and analytical tools for assessing the structural survivability and safety of technological equipment

Yield Load Solutions for SE(B) Fracture Toughness Specimen with I-Shaped Heterogeneous Weld

Fracture Mechanics Based Assessment of a Pressure Vessel Using R6 Procedure

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