Computer modelling of residual welding strains in technological design of welded structures

Medvedev, S. V.

doi:10.1080/09507110209549491

Cited by 7 publications

(6 citation statements)

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“…Since the middle of the last century, this position was cautious, but later the principles of constructive and technological design of welded structures received scientific recognition, also in the International Institute of Welding. Simultaneous (parallel) design of welded structures and development of welding technologies on the basis of calculation methods was supplemented in work with scientific and methodological approaches and with the corresponding software complex for automated design of technologically necessary assembly and welding fixtures [2]. Three-dimensional solid-state computer model of a welded structure and welds Zavarivanje i srodne tehnologije koje daju značajan doprinos stvaranju bruto nacionalnih proizvoda razvijenih zemalja ne mogu ostati podalje od procesa digitalizacije ekonomija i izgradnje novog postindustrijskog društva.…”

Section: Rezimementioning

confidence: 99%

“…Od sredine prošlog veka ova pozicija je bila oprezna, ali kasnije su principi konstruktivnog i tehnološkog projektovanja zavarenih konstrukcija dobili naučno priznanje, takođe i u Međunarodnom institutu za zavarivanje. Istovremeno (paralelno) projektovanje zavarenih konstrukcija i razvoj tehnologija zavarivanja na osnovu metoda proračuna dopunjen je u radu, naučnim i metodološkim pristupima i odgovarajućim softverskim kompleksom za automatizovano projektovanje tehnološki neophodnih montažnih i zavarivačkih instalacija [2]. Trodimenzionalni računarski model stanja čvrstoće zavarene konstrukcije i zavarenih proizvoda postaje glavni izvor i nosilac projektnih i tehnoloških informacija.…”

Section: Rezimeunclassified

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Computer and supercomputer technologies constructive-technological designing of responsible welded constructions

Medvedev¹,

Klimau²

2019

Zavariv zavar konstrukcije

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Section: Rezimementioning

confidence: 99%

Section: Rezimeunclassified

Computer and supercomputer technologies constructive-technological designing of responsible welded constructions

Medvedev¹,

Klimau²

2019

Zavariv zavar konstrukcije

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“…This system mainly was used for controlling the joint mismatch due to rotational distortion and thus could eliminate the necessity of tack welding. Another means of altering the heating pattern was to remove heat quickly from the weld zone by heat sinking method used by Medvedev [18]. This method holds a great promise in shipyard applications.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of mitigation of welding distortion

Adak

Mandal

2010

Applied Mathematical Modelling

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a b s t r a c tWelding stresses and deformations are closely related phenomena. During the heating and cooling cycles thermal strains may occur in the weld and adjacent area. The strains produced during the heating stage of welding are always accompanied by plastic deformation of the metal. The stresses resulting from these strains combine and react to produce internal forces that cause a variety of welding distortions. Welding deformation needs to be minimized and also the designer should know before hand the extent of deformation so that it can be accounted for in the design as well as in the construction stages.In this paper, heat sinking as a method of distortion mitigation has been studied. Heat sinking has been affected by circulating water through channel clamped at the bottom surface of the plates undergoing welding. The pseudolinear equivalent constant rigidity concept has been used in this investigation for thermo-mechanical analysis of plates undergoing welding with simultaneous heat sinking. The initial nonlinear problem with varying modulus dependent on temperature is transformed into a pseudolinear equivalent system of constant rigidity that is solved by linear analysis.The numerical results compared very well with those of the experimental ones. The proposed concept is found to be computationally more efficient and simpler to model compared to FEM for solving similar thermo-elasto-plastic nonlinear problems. The procedure presented in this work and the results thus obtained, holds a great promise for determining the heat sinking parameters for effectively controlling welding distortion.

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“…Toughness and resistance of the welded piece to failure is dependent on many factors such as welding parameters (cur-rent, voltage, speed etc. ), geometric shape, design of the welding piece, the method implemented for welding and the nature of the applied stresses and others [15]. Low productivity, relative shallow penetration and high sensitivity of the surface condition and chemical composition of the base metal are some of the disadvantages associated with GTAW process [16].…”

Section: Introductionmentioning

confidence: 99%

Review of GTAW Welding Parameters

Kutelu¹,

Seidu²,

Eghabor³

et al. 2018

JMMCE

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Welding as a fabrication process is one of the vital production routes for most manufacturing industries. Several factors are involved in the choice of welding process for specific applications; notable among these are compositional range of the material to be welded, the thickness of the base materials and type of current. Most metals oxidize rapidly in their molten state, and therefore, the weld area needs to be protected from atmospheric contamination; this is achieved in gas tungsten arc welding GTAW by a shielding gas (argon, helium, nitrogen). GTAW technique is one of the major processes for joining austenitic stainless steels (ASS) and ferritic stainless steel (FSS) fabrication. However, the microstructural change that occurs during welding and at weld joint is still a major challenge today as it affects both the corrosion resistance and the mechanical properties. Therefore, this present paper reviews past research findings on GTA welding of ASS and FSS. Results of the findings have confirmed that, depending on the amount of heat input, which can be controlled by welding parameters (welding speed, voltage and current), welded joints particularly, heat affected zones (HAZs) of both grades of steels can undergo mechanical failure and can be susceptible to corrosion attack if the joints are produced with a less ideal combination of welding parameters.

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Computer modelling of residual welding strains in technological design of welded structures

Cited by 7 publications

References 0 publications

Computer and supercomputer technologies constructive-technological designing of responsible welded constructions

Computer and supercomputer technologies constructive-technological designing of responsible welded constructions

Numerical and experimental study of mitigation of welding distortion

Review of GTAW Welding Parameters

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