A Finite-Element Model for Residual Stresses and Deflections in Girth-Butt Welded Pipes

Rybicki, E.F.; Schmueser, David; Stonesifer, R.B.; Groom, Jane; Mishler, H. W.

doi:10.1115/1.3454464

Cited by 115 publications

(57 citation statements)

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“…However, with the availability of 64 digit computers and refined FE tools, welding engineers around the world are more biased towards the computer simulations of complex welding phenomenon instead of the conventional trial and error approach on the shop floor. A significant simulation and experimental work focusing on circumferential welding is available in the literature [4][5][6][7][8][9][10][11]. As the computer simulation of welding processes is highly computationally intensive and large computer storage and CPU time are required, most of the previous research reduces computational power requirements by simplifying with assumptions such as rotational symmetry and lateral symmetry in numerical simulations [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of weld-induced residual stresses and distortions in thin-walled cylinders

2009

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Circumferential weld specifically in thin-walled structures is a common joint type in the fabrication of structural members in aerospace, aeronautical and pressure vessel industries. This type of weld joint suffers various types of weld-induced residual stress fields (hoop and axial) and deformation patterns (axial shrinkage, radial shrinkage). These imperfections have negative effects on fabrication accuracies and result in low strength welded structures that can lead to premature failures. To precisely capture the distortions and residual stresses, computational methodology based on three-dimensional finite element model for the simulation of gas tungsten arc welding in thin-walled cylinders is presented. Butt-weld geometry with single "V" for a 300 mm outer diameter cylinder of 3 mm thick is used. The complex phenomenon of arc welding is numerically solved by sequentially coupled transient, non-linear thermo-mechanical analysis. The accuracy of both the thermal and structural models is validated through experiments for temperature distribution, residual stresses and distortion. The simulated result shows close correlation with the experimental measurements.

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Section: Introductionmentioning

confidence: 99%

Analysis of weld-induced residual stresses and distortions in thin-walled cylinders

2009

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“…3 shows the finite element meshes. Temperature dependent material properties [7] were considered in the analysis and are shown in Table 1. Concurrent computation technique was employed to save the computing time.…”

Section: Numerical Simulationmentioning

confidence: 99%

Study on design pressure of in-service welding pipes

2006

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A method of predicting design pressure and burn-through of in-service welding pipes was established. Temperature distributions of in-service welding under variable parameters were simulated by FEM. The effect of flowing of internal media was regarded as forced convection. Based on the numerical results, design pressure of the pipe can be obtained and burn-through can be predicted. It can be concluded that the design pressure decreases with the increasing of heat input. RSF and design pressure of the pipe increase with the increasing of flow rate. There is a range in which the increase changes greatly. For in-service welding, the range should be considered adequately to determine operating condition optimally. RSF increases with the increasing of pipe wall thickness. While the thickness increases to an extent, RSF shows little increase. According to the curves of design pressure versus different parameters, safe working pressure can be achieved.

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“…Ueda and Yamakawa (1971) were the first among those who proposed a thermal elasto-plastic finite element model to analyze the transient thermal stresses induced in a butt joint configuration with material deposition from a moving electrode. Following this pioneering work, many researchers have successfully developed various numerical models (Ueda et al, 1986;Ueda and Yamakawa, 1971;Hibbitt and Marcal, 1973;Rybicki et al, 1978;Radaj, 1992;Luo, 1997;Hong et al, 1998;Dong, 2001;Lindgren, 2006) based on finite element method to predict temperature distribution, analyze the welding residual stress and distortion both in 2D and 3D problems. Hibbitt and Marcal (1973) developed a numerical model for the welding of a large structure by subsequent loading to the structure for high strength steels.…”

Section: Introductionmentioning

confidence: 99%

Influence of tacking sequence on residual stress and distortion of single sided fillet submerged arc welded joint

Mondal

Biswas

Bag

2015

J. Marine. Sci. Appl.

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Submerged arc welding (SAW) is advantageous for joining high thickness materials in large structure due to high material deposition rate. The non-uniform heating and cooling generates the thermal stresses and subsequently the residual stresses and distortion. The longitudinal and transverse residual stresses and angular distortion are generally measured in large panel structure of submerged arc welded fillet joints. Hence, the objective of this present work is to quantify the amount of residual stress and distortion in and around the weld joint due to positioning of stiffeners tack. The tacking sequence influences the level of residual stress and proper controlling of tacking sequences is required to minimize the stress. In present study, an elasto-plastic material behavior is considered to develop the thermo mechanical model which predicts the residual stress and angular distortion with varying tacking sequences. The simulated result reveals that the tacking sequence heavily influences the residual stress and deformation pattern of the single sided fillet joint. The finite element based numerical model is calibrated by comparing the experimental data from published literature. Henceforth, the angular distortions are measured from an in-house developed experimental set-up. A fair agreement between the predicted and experimental results indicates the robustness of the developed numerical model. However, the most significant conclusion from present study states that tack weld position should be placed opposite to the fillet weld side to minimize the residual stress.

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A Finite-Element Model for Residual Stresses and Deflections in Girth-Butt Welded Pipes

Cited by 115 publications

References 0 publications

Analysis of weld-induced residual stresses and distortions in thin-walled cylinders

Analysis of weld-induced residual stresses and distortions in thin-walled cylinders

Study on design pressure of in-service welding pipes

Influence of tacking sequence on residual stress and distortion of single sided fillet submerged arc welded joint

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