Finite Element Modeling of Three-Dimensional Transient Heat Transfer in Stainless Steel (304) Pulsed Gta Weldments

Reddy, Annedi Achuta; Guha, B.; Achar, D. R. G.

doi:10.1080/104077802317221438

Cited by 17 publications

(14 citation statements)

References 18 publications

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“…The expression for the double ellipsoidal volumetric heat source contained six empirical constants that were calibrated by comparing the computed weld dimensions with the corresponding measured results. [12] Similar modeling efforts were reported by Bonifaz, [13] Reddy et al, [14] and Dutta et al [15] for gas tungsten arc welding (GTAW) process.…”

Section: Introductionsupporting

confidence: 69%

“…A similar range of process efficiencies in GTAW process was also reported in previous literature. [14,15] Figure 8 shows the computed 3-D temperature distribution corresponding to a typical welding condition with welding current, voltage, and speed as 80 A, 13.1 V, and 8.2 mm/s, respectively. The temperature isotherm is symmetrical about the yz plane, but it is unsymmetrical with respect to other planes due to the movement of welding arc along the positive y-axis.…”

Section: Resultsmentioning

confidence: 99%

“…[8] does not need a priori knowledge of the final weld pool shape that is otherwise required in similar expressions used earlier. [14][15][16][17] The heat input obtained from Eq. [8] is accommodated in the numerical calculations through the term, _ Q, in Eq.…”

Section: Numerical Modelmentioning

confidence: 99%

“…The heat conduction-based models [8][9][10][11][12][13][14][15][16][17][18] are, of course, silent to questions on how the molten metal flows within weld pool and influences the final weld shape. Significant efforts are also made to develop convective heat transport-based model to analyze both heat transfer and fluid flow in the molten-weld pool by solving conservation equations of continuity, momentum, and energy equations under constant pressure field.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Development of a Three-Dimensional Heat-Transfer Model for the Gas Tungsten Arc Welding Process Using the Finite Element Method Coupled with a Genetic Algorithm–Based Identification of Uncertain Input Parameters

Bag

2008

Metall Mater Trans A

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An accurate estimation of the temperature field in weld pool and its surrounding area is important for a priori determination of the weld-pool dimensions and the weld thermal cycles. A finite element-based three-dimensional (3-D) quasi-steady heat-transfer model is developed in the present work to compute temperature field in gas tungsten arc welding (GTAW) process. The numerical model considers temperature-dependent material properties and latent heat of melting and solidification. A novelty of the numerical model is that the welding heat source is considered in the form of an adaptive volumetric heat source that confirms to the size and the shape of the weld pool. The need to predefine the dimensions of the volumetric heat source is thus overcome. The numerical model is further integrated with a parent-centric recombination (PCX)-operated generalized generation gap (G3) model-based genetic algorithm to identify the magnitudes of process efficiency and arc radius that are usually unknown but required for the accurate estimation of the net heat input into the workpiece. The complete numerical model and the genetic algorithm-based optimization code are developed indigenously using an Intel Fortran Compiler. The integrated model is validated further with a number of experimentally measured weld dimensions in GTA-welded samples in stainless steels.

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Section: Introductionsupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Section: Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of a Three-Dimensional Heat-Transfer Model for the Gas Tungsten Arc Welding Process Using the Finite Element Method Coupled with a Genetic Algorithm–Based Identification of Uncertain Input Parameters

Bag

2008

Metall Mater Trans A

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“…In the past, a great deal of effort was focused on the mathematical simulation of the weld pool in gas tungsten arc welding (GTAW) [e.g., [3][4][5][6][7][8]. Marangoni flow (surface tension driven flow) was found to dominate the fluid flow in the weld pool, affecting weld penetration and the formation of segregation and porosity [e.g., [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Weld pool dynamics and the formation of ripples in 3D gas metal arc welding

Guo

Tsai

2008

International Journal of Heat and Mass Transfer

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This article studies the transient weld pool dynamics under the periodical impingement of filler droplets that carry mass, momentum, thermal energy, and species in a moving 3D gas metal arc welding.The complicated transport phenomena in the weld pool are caused by the combined effect of droplet impingement, gravity, electromagnetic force, plasma arc force, and surface tension force (Marangoni effect). The weld pool shape and the distributions of temperature, velocity, and species in the weld pool

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Efficient Estimation Of Volumetric Heat Source In Fusion Welding Process Simulation

et al. 2012

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Finite Element Modeling of Three-Dimensional Transient Heat Transfer in Stainless Steel (304) Pulsed Gta Weldments

Cited by 17 publications

References 18 publications

Development of a Three-Dimensional Heat-Transfer Model for the Gas Tungsten Arc Welding Process Using the Finite Element Method Coupled with a Genetic Algorithm–Based Identification of Uncertain Input Parameters

Development of a Three-Dimensional Heat-Transfer Model for the Gas Tungsten Arc Welding Process Using the Finite Element Method Coupled with a Genetic Algorithm–Based Identification of Uncertain Input Parameters

Weld pool dynamics and the formation of ripples in 3D gas metal arc welding

Efficient Estimation Of Volumetric Heat Source In Fusion Welding Process Simulation

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