Numerical Simulation of the Welding Process — Distortion and Residual Stress Prediction, Heat Source Model Determination

Slováček, Marek; Divis, Vladimir; Junek, L.; Ochodek, Vladislav

doi:10.1007/bf03266499

Cited by 23 publications

(16 citation statements)

References 2 publications

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“…As it was already mentioned, calculations using the "transient" technique are practically impossible to use, from the point of view of the amount of data generated during them, in the case of numerical analyses of large or complex welded structures. In such cases, the "macro-bead" (MBD) technique is used [1,3,4,23,24], which is in a way an extension of the "transient" technique and involves the use of a properly prepared thermal cycle immediately on one or several areas (elements) of the model simultaneously ( Figure 3). The analysis carried out using the "transient" technique is divided into three parts: preparation of the material base, calculation of thermal phenomena and related metallurgical changes as well as mechanical phenomena (i.e., stresses and displacement distributions, etc.)…”

Section: Macro-bead Technique: Imposed Thermal Cyclementioning

confidence: 99%

“…The limitation of this method, however, is that the results of the analyses carried out on the global model are only structural deformations as well as internal forces and moments under specific mounting conditions. The stresses level and distribution of individual metallurgical phases are determined by local models obtained as a result of analyses carried out using the "transient" or MBD technique [1,3,4,23,24].…”

Section: Macro-bead Technique: Imposed Thermal Cyclementioning

confidence: 99%

“…After the calibration, it can be transferred to the model of the entire structure. In the case where the structure has a large number of the same joints (joint type and lateral dimensions of the weld), due to its repeatability, the calculation process is significantly accelerated in time as it was the case with the "local-global" method using MBD techniques [1][2][3][4]23,24]. phenomena occurring during the welding process are used.…”

Section: Shrinkage Technique: Distortion Engineeringmentioning

confidence: 99%

“…In the case where the structure has a large number of the same joints (joint type and lateral dimensions of the weld), due to its repeatability, the calculation process is significantly accelerated in time as it was the case with the "local-global" method using MBD techniques [1][2][3][4]23,24]. Analyses carried out using the "shrinkage" technique allows for quick analysis of structure deformations with a very large number of welded and welded joints, e.g., with a laser beam, as well as optimization of the order of their execution in terms of minimizing deformations.…”

Section: Shrinkage Technique: Distortion Engineeringmentioning

confidence: 99%

See 3 more Smart Citations

Computational Techniques in Numerical Simulations of Arc and Laser Welding Processes

Kik

2020

Materials

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The article presents a comparison of modern computational techniques used in numerical analyses of welding processes. The principles of the “transient” technique calculations with a moving heat source, the “macro-bead” (MBD) technique, with an imposed thermal cycle on a selected weld bead section and the “local–global” approach with shrinkage calculation technique were described. They can be used, depending on the variant chosen, both for individual, simple weld joints and those made of many beads or constructions containing dozens of welds and welded elements. Differences in the obtained results and time needed to perform calculations with four different calculation examples of single and multipass arc and laser beam welding processes were presented. The results of calculations of displacements and stresses distributions in the welded joints using various computational techniques were compared, as well as the calculation times with the described techniques. The numerical analyses in the SYSWELD software package have shown the differences between the described computational techniques, as well as an understanding of the benefits and disadvantages of using each of them. This knowledge allows preparing an efficient and fast optimization of the welding processes, often aimed at minimizing deformations in the first place, as well as detection of potential defects of both simple and complex welded structures. In general, the possibilities and flexibility of modern numerical calculation software have been presented.

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Section: Macro-bead Technique: Imposed Thermal Cyclementioning

confidence: 99%

Section: Macro-bead Technique: Imposed Thermal Cyclementioning

confidence: 99%

Section: Shrinkage Technique: Distortion Engineeringmentioning

confidence: 99%

Section: Shrinkage Technique: Distortion Engineeringmentioning

confidence: 99%

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Computational Techniques in Numerical Simulations of Arc and Laser Welding Processes

Kik

2020

Materials

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“…The front half of the source is the quadrant of one ellipsoidal source and the rear half is the quadrant of another ellipsoid, and this figure also shows the distribution of power density along the y-axis [27,32,33].…”

Section: Governing Equationsmentioning

confidence: 99%

Finite element analysis of the effect of porosity on residual stress in 2024 aluminium alloy GTAW

Poolperm

Nakkiew

Naksuk

2020

Mater. Res. Express

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Simulations of the welding process for butt joints using finite element analysis (FEA) of the effect of porosity are presented. The metal used was aluminium alloy (grade 2024), and the filler material was alloy ER5356. The simulations were performed using the commercial software ANSYS, considering a double ellipsoid heat source, temperature-dependent material properties, material deposits, mechanical analysis, transient heat transfer, and defects (porosity). In this study, the FEA simulations were constructed for two types of heat source (singleand double-ellipsoid) used in gas tungsten arc welding (GTAW), and the calculated residual stress results were compared with the experimental values. Two double ellipsoid models were constructed for cases with and without porosity. The porosity was measured by three-dimensional (3D) computed tomography (CT), and the size and location of pores were mapped onto the weld bead created by the birth-and-death technique.

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Estimation of heat source model parameters for twin-wire submerged arc welding

Sharma

Chaudhary²,

Arora

et al. 2009

Int J Adv Manuf Technol

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Numerical Simulation of the Welding Process — Distortion and Residual Stress Prediction, Heat Source Model Determination

Cited by 23 publications

References 2 publications

Computational Techniques in Numerical Simulations of Arc and Laser Welding Processes

Computational Techniques in Numerical Simulations of Arc and Laser Welding Processes

Finite element analysis of the effect of porosity on residual stress in 2024 aluminium alloy GTAW

Estimation of heat source model parameters for twin-wire submerged arc welding

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