Numerical simulation of dissimilar metal welding and its verification for determination of residual stresses

Szávai, Szabolcs; Bézi, Zoltán; Ohms, Carsten

doi:10.3221/igf-esis.36.04

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…Using the FEM, it was possible to solve the mathematical model and the governing equations [24]. According to Fig.…”

Section: The Finite Element Modelling Methodsmentioning

confidence: 99%

Numerical investigation of the effect of driving forces on the weld pool convection and thermal stress in a GTAW process

Bensada

Laazizi²,

Fri³

et al. 2022

Preprint

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The present research article aims to obtain good weld integrity and avoid material fracture due to high welding temperature. The Computational Fluid Dynamics (CFD) and Finite Element Method (FEM) were used to study GTAW process. The heat source distribution and the convection movement in the melted pool were taking into account. In fact, a two-dimensional (2D) numerical model has been developed for GTAW process and applied for 304L stainless steel. The effects of welding operating parameters were discussed such as voltage and current. The simulation showed that capillary force presented by Marangoni convection affects mainly the weld pool geometry. Therefore, as a result, increasing the welding power and specially the current intensity leads to the growth of the melted zone rapidly, which may induce high residual stress and risks of metal failure. Finally, comparing computed weld profile with the experimental results showed good agreement.

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“…Using the FEM, it was possible to solve the mathematical model and the governing equations [24]. According to Fig.…”

Section: The Finite Element Modelling Methodsmentioning

confidence: 99%

Numerical investigation of the effect of driving forces on the weld pool convection and thermal stress in a GTAW process

Bensada

Laazizi²,

Fri³

et al. 2022

Preprint

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“…The applied methodology of the modelling of dissimilar metal welds was validated in a previous research [8] where the welding of a DN 500 nozzles mock-up was simulated.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…A considerable number of experimental tools are available to investigate the magnitude and distribution of welding residual stresses; however, many tests are required for the verification and, in the case of multi-pass DMWs in nuclear power plants, the analysis can be very difficult and time-consuming. Therefore, the usage of the finite element method to investigate the welding processes has become widely spread [7,8]. However, it should be mentioned that the residual stresses are sensitive to the material and welding parameters for example.…”

Section: Introductionmentioning

confidence: 99%

Study of the Stress State of a Dissimilar Metal Weld Due to Manufacturing and Operational Conditions

Spisák

Bézi

Szávai

2022

Period. Polytech. Mech. Eng.

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Welding is accompanied by the presence of weld residual stresses, which in case of dissimilar metal welds even with post weld heat treatment cannot be removed completely therefore they should be considered when assessing possible welding defects. The measurement of residual stress in metal weld is a very complex procedure and also in the investigated case could not be carried out as it is the part of a working plant. However, by modelling these processes, the residual stresses and deformation of the components caused by this manufacturing method can be determined. It is important to calculate these values as accurately as possible to determine the maximum load capacity of the structure. The structure under examination was the dissimilar metal weld of a VVER-440 steam generator. 2D simulations were performed, where temperature and phase-dependent material properties were implemented. Different loading scenarios were considered in the numerical analysis. The results can be useful to determine the real loading conditions of a given component and can be used to predict stress corrosion crack initiation locations, as well as to evaluate the lifetime and failure mode prediction of welded joints.

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“…Nowadays, it is possible to use numerical simulation techniques to predict the residual stresses in welded structures and it can be employed to simulate welding temperature field and welding deformation. [1][2][3][4][5][6][7]. In order to reduce the computational time and cost, most of the researchers choose the 2D model.…”

Section: Introductionmentioning

confidence: 99%

Effect of the welding parameters on residual stresses in pipe weld using numerical simulation

Alhafadhi¹,

Krállics²

2020

DMS

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The objective of this article is to predict the residual welding stress in a dissimilar pipe weld. The 2D model, instead of 3D was used to reduce the time and cost of the numerical calculation. The 2D numerical simulation MSC MARC code is used to predict the residual stress developed during pipe welding. The present model was validated using hardness measurement. Good agreement was found between the measurement and numerical simulation results. The effects of welding parameters on residual stress field on the outer and inner surface were assessed. The effect of welding parameter (welding current) is examined. The axial and hoop residual stresses in dissimilar pipe joints of different thickness for pipe weld were simulated in outer and inner surfaces. When the other parameters remain fixed, and the current has great effect on the weld shape and size, and then affects the residual stress level significantly.

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Numerical simulation of dissimilar metal welding and its verification for determination of residual stresses

Cited by 12 publications

References 3 publications

Numerical investigation of the effect of driving forces on the weld pool convection and thermal stress in a GTAW process

Numerical investigation of the effect of driving forces on the weld pool convection and thermal stress in a GTAW process

Study of the Stress State of a Dissimilar Metal Weld Due to Manufacturing and Operational Conditions

Effect of the welding parameters on residual stresses in pipe weld using numerical simulation

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