Calculation method for evaluating the concentration coefficient in the elastic–plastic stress area

Erofeev, V. V.; Grebenshchikova, Olga; Шарафиев, Р. Г.; Troyanovskaya, Irina

doi:10.1016/j.matpr.2020.08.130

Cited by 2 publications

(3 citation statements)

References 14 publications

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“…The magnitude of the maximum stresses depends on global stresses, which are determined by the normative parameters of the geometric dimensions of welded joints and seams (specified by GOST standards, normals) and on local stresses, mainly depending on the radius of transition of the seam to the base metal R, which is not regulated by regulatory documents and, as practice shows, can vary from 0.1 to 2 mm. [5][6][7][8][9].…”

Section: Justification Of the Purpose Of The Studymentioning

confidence: 99%

Improving the efficiency of welded joints of the “insert pipe-plate” type

Assaulenko,

Lyudmirsky,

Kharchenko

2023

E3S Web Conf.

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The article is devoted to the analysis of the causes of damage formation in the transition zone from the seam metal to the base metal of butt welded joints. A method for increasing fatigue strength and improving the properties of compounds of this type is proposed. The analysis of cases of fatigue failures of welded joints operating under repeated static loads indicates that cracks most often originate in the transition zone from the seam to the base metal. For this reason, the geometric parameters of the zone of maximum stress concentration should be taken into account when predicting performance. To analyze the operability of welded joints, which did biaxial loading on a breaking machine test. The operability of welded joints of the "insert pipe-plate" type in the initial state is approximately 4 times lower than the operability of the base metal by remelting the transition zone without electrode oscillations (samples 5 and 6) make up half of the operability of the base metal. By remelting the transition zone with an oscillating electrode with regulation of the linear energy along the width of the seam (samples 7 and 8) are practically not inferior to the operability of the base metal. 1 The design of the installation, which allows for automatic remelting of the transition zone from the seam to the base metal with transverse arc vibrations, providing a coupling radius R = 4 – 6mm. 2 Reduction of stress concentration and regulation of the zone of thermal influence at the junction of the seam with the base metal made it possible to increase the resistance to the origin and development of destruction of welded joints "weld-sheet" to almost similar characteristics of the base metal.

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Section: Justification Of the Purpose Of The Studymentioning

confidence: 99%

Improving the efficiency of welded joints of the “insert pipe-plate” type

Assaulenko,

Lyudmirsky,

Kharchenko

2023

E3S Web Conf.

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“…Depending on the welding method (manual, mechanized, or automatic), the residual stress level σ 𝑟 varies in a wide range: 0 ≤ σ 𝑟 ≤ σ 𝑢𝑡𝑠 (where σ 𝑢𝑡𝑠 is the ultimate tensile strength of the material). This is due to uneven heating, cooling and subsequent transverse shrinkage of the weld metal [6][7][8]. The maximum residual stresses σ 𝑟 max in the weld zone, taking into account the concentration, are…”

Section: Research Modelmentioning

confidence: 99%

“…For the full penetration (𝐴 = 1), 𝑡 is equal to the plate thickness. Application of formulas (6)(7)(8) to T-welds requires some adjustment. For T-welds, the parameter 𝑡 in (8) must be replaced with the penetration depth 𝐻 𝑛𝑝 in the direction of the arc axis.…”

Section: Modern Trends In Materials Processingmentioning

confidence: 99%

Welding Mode Justification for a T-Joint

Erofeev

Troyanovskaya

Ignatiev

et al. 2022

KEM

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The paper proposes a method for calculating the mode of single-pass arc welding depending on the geometric parameters of the T-fillet weld. The authors reveal the dependence of the residual welding stress level on the welding mode, taking into account the stress concentration due to uneven heating and transverse weld shrinkage. Resulting from the comparison of three modes of single-pass arc welding (manual, mechanized, and automatic), the optimal modes that ensure the maximum lifetime of welded structures are determined.

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Calculation method for evaluating the concentration coefficient in the elastic–plastic stress area

Cited by 2 publications

References 14 publications

Improving the efficiency of welded joints of the “insert pipe-plate” type

Improving the efficiency of welded joints of the “insert pipe-plate” type

Welding Mode Justification for a T-Joint

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