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Determination of Welding Heat Source Parameters Using the Actual Bead Shape

Determination of Welding Heat Source Parameters Using the Actual Bead Shape

Kategori
Vitenskapelig artikkel
Sammendrag
Analytical and numerical approaches are used to model a gas metal arc welding (GMAW) process. In order to simulate the detailed aspects of material changes during the process, it is important to implement the correct size and distribution of the heat source. In this study the dimensions of a heat source model in a welding case will be calculated based on experimentally observed weld pool sizes. An analytical approach called ‘discretely distributed point heat source model’ will be used for this purpose as an intermediate stage between the experiments and the numerical model. In the numerical approach, the heat source will be split into two perpendicular 2D ellipsoidal sources that correspond to the double-ellipsoidal heat source model. The third dimension of the heat source will be measured from the top-view of the end crater. WeldSimS and Matlab codes are used for finite element and analytical investigations respectively. Both models were compared and analyzed with respect to similar boundary conditions. Numerical simulations show good agreement with the analytical approach calibrated by actual weld dimensions.
Oppdragsgiver
  • Research Council of Norway (RCN) / 192967/S60
Språk
Engelsk
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • SINTEF Ocean / Skip og havkonstruksjoner
  • SINTEF Industri / Materialer og nanoteknologi
År
2012
Publisert i
Computational Materials Science
ISSN
0927-0256
Forlag
Elsevier
Årgang
54
Side(r)
176 - 182