Numerical simulation of equivalent heat source temperature field of asymmetrical fillet root welds

Jianfeng, Yue; Dong, Xiaoting; Guo, Rui; Liu, Wenji; Li, Liangyu

doi:10.1016/j.ijheatmasstransfer.2018.10.075

Cited by 16 publications

(12 citation statements)

References 13 publications

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“…Materials 2020, 13 Figure 5 shows the error verification of the sensitivity regression analysis. The ordinate is the weld formation result calculated by the regression equation, the slopes of the fitting curves in ln (width) and ln (penetration) are close to 45°, which indicates that the calculation results of the regression equation have high accuracy.…”

Section: Determine the Heat Source Model Parametersmentioning

confidence: 99%

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Numerical Simulation and Experimental Research on Temperature Distribution of Fillet Welds

Zuo

Wang

et al. 2020

Materials

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In this paper, a matrix equation for the welding heat source model was proposed to calculate the fillet welds temperature distribution based on the penetration depth and molten width. A double ellipsoid heat source model of fillet weld was established firstly by physical experiment and simulation calculation, and then the orthogonal experiment was constructed based on the previous calculation methods and experimentally measured data. Finally, the matrix equation of the heat source model parameters was obtained by regression analysis based on the joint penetration and width. The experimental and numerical simulation of the temperature distribution had been performed for the fillet weld and the results show that (1) the heat flux increases in one direction, while, oppositely, it decreased in another direction; (2) simulation results were highly in accordance with experiments results. The results indicated that the double ellipsoidal heat source model calculated by the matrix equation is quite appropriate for predicting the transient temperature distribution on the fillet welds for the gas metal arc welding process.Materials 2020, 13, 1222 2 of 11 for calculating residual stress, deformation, and solidification [16,17]. First of all, the premise of obtaining an accurate temperature field was to formulate a heat source model that was consistent with the actual situation. A welding heat source model was established by Rosenthal's application of Fourier's law (that is, point, line, and surface heat sources), which could reasonably calculate the transient temperature distribution at a certain distance from the heat source. Rosenthal's analysis, however, is less accurate for the temperature in or near the fusion and heat-affected zones because the scheme defined that the physical properties of the material did not change with temperature. To overcome most of these limitations, other forms of heat source models have been proposed. It was worth mentioning that the double ellipsoid heat source model was proposed by Goldak, which could well describe the arc welding heat source model [18].Due to the development of computers, welding numerical simulations has made great progress [19]. A 3-D heat transfer model has been established by Kim et al., in which the temperature, weld pool shape, and the weld pool reinforcement surface during gas-metal arc fillet welding were analyzed. In the establishment of this model, not only the heat transfer from the welding arc was considered, but also the thermal effect of metal droplets was considered by the volume heat source [20]. By summarizing the calculation of the temperature field of the predecessors, the transient temperature analytical equation of the semi-infinite body under the three-dimensional motion heat source was obtained by Fachinotti et al. [21]. Winczek applied the bimodal heat source model to establish a temperature field analytical model, which could well analyze the temperature of the multi-pass GMAW in the infinite body model [22].Some scholars have proposed some methods...

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Section: Determine the Heat Source Model Parametersmentioning

confidence: 99%

“…Welding temperature is one of the important determinants of metallurgy, crystallization, phase transition, and stress-strain field of structural parts [11][12][13], which is the main factor affecting welding quality and production efficiency [14,15]. In conclusion, reasonable temperature distribution is critical…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Research on Temperature Distribution of Fillet Welds

Zuo

Wang

et al. 2020

Materials

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“…It has also the capability to solve complex geometries and non-linear problems. 1,6,9 Numerical simulation methods have been employed by different research groups to predict GMAW thermal field, weld zone profile. 1,[9][10][11] For numerical analysis of the weld profile heat source models such as Gaussian, double ellipsoidal, conical, and equivalent heat sources have been used successfully.…”

Section: Introductionmentioning

confidence: 99%

“…1,6,9 Numerical simulation methods have been employed by different research groups to predict GMAW thermal field, weld zone profile. 1,[9][10][11] For numerical analysis of the weld profile heat source models such as Gaussian, double ellipsoidal, conical, and equivalent heat sources have been used successfully. 1,10,12 The analytical type of model is suitable for electron beam and laser welding processes.…”

Section: Introductionmentioning

confidence: 99%

“…1,[9][10][11] For numerical analysis of the weld profile heat source models such as Gaussian, double ellipsoidal, conical, and equivalent heat sources have been used successfully. 1,10,12 The analytical type of model is suitable for electron beam and laser welding processes. However, the application of numerical models for the analysis of welding problems is realistic in nature.…”

Section: Introductionmentioning

confidence: 99%

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Finite element analysis and experimental investigation of moving heat source model for GMAW deposited mild steel weld bead

Aslam

Sahoo

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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An investigation has been done to identify the heat source model suitable for numerical modeling of the Gas Metal arc Welding (GMAW) welding process. In the present investigation, a numerical model was constructed to simulate the GMAW welding process through transient thermal analysis for different thermal heat source models for weld deposition of Mild steel considering semi-cylindrical weld bead geometry. The Gaussian heat source with radial coordinate system and double ellipsoidal thermal heat source have been considered to develop a Finite Element Analysis (FEA) model. Validation of numerical analysis results has been confirmed through experimental investigation. Numerical modeling confirms the utilization of both heat sources, i.e. Gaussian and Double ellipsoidal for the prediction of the weld bead deposition profile. However, the numerical modeling developed using a double ellipsoidal heat source has more resembles experimental investigation due to the utilization of bead profile data. However, the Gaussian heat source is found to be suitable in the case of the unavailability of experimental data. The experimental studies show a variation in the weld bead geometry, along its welding direction due to multiple environmental factors. The microstructural investigation also shows the development of a fine columnar grain structure at the welding bead & weld penetration zone, and the grain structure became coarser at the Heat Affected Zone (HAZ).

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Study of the Effect of Welding Current on Heat Transfer and Melt Pool Geometry on Mild Steel Specimen Through Finite Element Analysis

Aslam

Sahoo

2021

Lecture Notes in Mechanical Engineering

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Numerical simulation of equivalent heat source temperature field of asymmetrical fillet root welds

Cited by 16 publications

References 13 publications

Numerical Simulation and Experimental Research on Temperature Distribution of Fillet Welds

Numerical Simulation and Experimental Research on Temperature Distribution of Fillet Welds

Finite element analysis and experimental investigation of moving heat source model for GMAW deposited mild steel weld bead

Study of the Effect of Welding Current on Heat Transfer and Melt Pool Geometry on Mild Steel Specimen Through Finite Element Analysis

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