Transient thermal finite element simulation of moving gas tungsten arc welding on AISI 4340 aeronautical steel

Dhandapani, N. V.; Dhinakaran, V.; Krishnakumar, Kalmanje; Rajkumar, V.

doi:10.1063/5.0025111

Cited by 2 publications

(2 citation statements)

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“…The authors included the effect of convection and radiation into their transient temperature field modelling via FE boundary conditions as these effects are deem significant [23][24]. Usually, the FEA boundary conditions, imposed on the external surfaces of the spatial domain, using FEA packages such as ANSYS [14][15][16][17][18][25][26][27] or ABAQUS [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…Numerical techniques such as the finite element (FE) method are commonly used, particularly for simulating of heating process in complex geometries, to obtain transient temperature field for various heat sources [10,[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The FEA method requires calibration of the heat source parameters to get a solution with acceptable accuracy for predicting the transient temperature field in the heated products and melted pool geometry.…”

Section: Introductionmentioning

confidence: 99%

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Simulating Convective-Radiative Heat Sinks Effect by means of FEA-based Gaussian Heat Sources and Its Approximate Analytical Solutions for Semi-Infinite Body

Nguyen¹,

Chujutalli

2021

Preprint

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FEA-based Gaussian density heat source models were developed to study the effect of convective and radiative heat sinks on the transient temperature field predicted by the available approximate analytical solution of the purely conduction-based Goldak’s heat source. A new complex 3D Gaussian heat source model, incorporating all three modes of heat transfer, i.e., conduction, convection and radiation, has been developed as an extension of the Goldak heat source. Its approximate transient analytical solutions for this 3-D moving heat source were derived and numerically benchmarked with the available measured temperature & weld pool geometry data by Matlab programming with ~5 to 6 times faster than FEA-based simulation. The new complex 3D Gaussian heat source model and its approximate solution could significantly reduce the computing time in generating the transient temperature field and become an efficient alternative to extensive FEA-based simulations of heating sequences, where virtual optimisation of a melting heat source (i.e. used in welding, heating, cutting or other advanced manufacturing processes) is desirable for characterisation of material behaviour in microstructure evolution, melted pool, microhardness, residual stress and distortions.

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