Numerical simulation of thermal and residual stress fields induced by lined pipe welding

Obeid, Obeid; Alfano, Giulio; Bahai, H.; Jouhara, Hussam

doi:10.1016/j.tsep.2017.10.005

Cited by 27 publications

(15 citation statements)

References 18 publications

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“…A moving heat source based on Goldak’s ellipsoid heat source model was used. The FEM was validated using previous experiments of the same sections of carbon-manganese C-Mn steel pipe lined with stainless steel, and the results show good agreement [10]. Almeida et al performed a TIG butt-welding simulation on thin AISI 316L stainless steel plates, the induced residual stresses due to the double ellipsoidal heat source are found to be in good agreement with the results obtained from experiment [2].…”

Section: Introductionmentioning

confidence: 72%

“…Numerical simulation using finite element methods (FEM) is the commonly used technique to predict and analyze welding residual stresses [9], which is less time-consuming, cost-effective and offers greater versatility compared to experimental measurements [1]. FE simulation of welding process using Goldak’s ellipsoidal heat source model has been applied to predict residual stresses and deformation, which results from the induced transient thermal field by many researchers, and the experimental validation shows good agreement [5,10,11].…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate

Ahmad

Gong

et al. 2019

Materials

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Finite element (FE) analysis of welding residual stress and deformation is one of the essential stages in the manufacturing process of mechanical structures and parts. It aids in reducing the production cost, minimizing errors, and optimizing the manufactured component. This paper presents a numerical prediction of residual stress and deformation induced by two-pass TIG welding of Al 2219 plates. The FE model was developed using ABAQUS and FORTRAN packages, Goldak’s heat source model was implemented by coding the nonuniform distributed flux (DFLUX) in user subroutine to represent the ellipsoidal moving weld torch, having front and rear power density distribution. Radiation and convection heat losses were taken into account. The mechanical boundary condition was applied to prevent the model from rotation and displacement in all directions while allowing material deformation. The FE model was experimentally validated and the compared results show good agreement with average variations of 18.8% and 17.4% in residual stresses and deformation, respectively.

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate

Ahmad

Gong

et al. 2019

Materials

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“…When comparing the two types of connections, the welding connection has the following disadvantages: (1) the quality of field welding is difficult to guarantee, especially for steel tubes with a large diameter, and (2) residual stress is induced in this connection. Residual stress is a major factor that contributes to fatigue damage, stress corrosion cracking and brittle fracture (Obeid et al, 2018; Wu and Kim, 2018). For flanged connections, because there is a large flange, the appearance is not aesthetically pleasing, particularly for architecturally exposed structural steel.…”

Section: Introductionmentioning

confidence: 99%

Structural behaviour of inner set bolted joints in steel tubes under tension

Cao

Zhang

2020

Advances in Structural Engineering

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In this article, the structural behaviour of a new continuous joint of steel tube under tension is systematically studied. Structural analyses of six typical joints under tension are carried out. The experimental set-up and details of the specimens are introduced, followed by descriptions of the results and experimental observations. Based on the experimental results, the main behavioural patterns are discussed and the salient response characteristics related to stress concentration and capacity are examined. An ideal elastoplastic stress–strain relationship, Mises yield criterion and geometric nonlinear finite element analysis model are established, and a detailed description of the modelling assumptions is presented. A large number of finite element parameters are further analysed. The experimental and numerical findings presented in this article offer direct information on the influence of key bearing capacity properties, such as the plugged length of the cross-gusset, the area of the cross-gusset and the area of the cushion-plate, on the main response characteristics. The results also provide essential data for future analytical and design-oriented studies.

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“…In that study, the effects of heat input, groove shape, and layer number on WRS distribution were studied to find the approach to reduce WRS. Obeid et al 20 investigated numerical thermal fields and WRS induced by single-pass weld overlay (lapweld) and girth welding (butt-weld) in lined pipe using TIG welding. It was shown that the use of an inner layer known as a liner has a considerable influence on the thermal history and residual stress distributions.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional finite element modelling of welding residual stresses of medium carbon steel pipes with consideration of solid-state austenite-martensite transformation and post-weld heat treatment

Farahani

Aragh

Mansur

2019

Proceedings of the IMechE

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In the present work, three-dimensional finite element modelling is presented to simulate welding of the medium carbon steel pipes by considering both the solid-state austenite-martensite transformation and the post-weld heat treatment. Thermo-elasto-plastic and metallurgical analyses are carried out by developing two user-defined subroutines: one for applying the heat flux and the another one for considering phase transformation effects on welding residual stresses. The applied heat flux is simulated by a double ellipsoid model. Furthermore, the effects of volumetric change due to the solid-state austenite-martensite transformation are taken into account. The results obtained have revealed that volumetric change owing to the solid-state austenite-martensite transformation has a significant effect on the magnitude and distribution of welding residual stresses. The main contribution of the present work is providing helpful knowledge about welding residual stresses evolution after and before the post-weld heat treatment by considering the solid-state austenite-martensite transformation. In addition to reference to the time–temperature–transformation diagram, this study can result in safe selection of post-weld heat treatment parameters, which not only prevents sensitization to stress corrosion cracking and intergranular corrosion but also provides enough and more importantly controlled relaxation of welding residual stresses.

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Numerical simulation of thermal and residual stress fields induced by lined pipe welding

Cited by 27 publications

References 18 publications

Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate

Finite Element Prediction of Residual Stress and Deformation Induced by Double-Pass TIG Welding of Al 2219 Plate

Structural behaviour of inner set bolted joints in steel tubes under tension

Three-dimensional finite element modelling of welding residual stresses of medium carbon steel pipes with consideration of solid-state austenite-martensite transformation and post-weld heat treatment

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