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Effect of heat source configuration on the result quality of numerical calculation of welding-induced distortion

: Heinze, C.; Schwenk, C.; Rethmeier, M.


Simulation modelling practice and theory 20 (2012), Nr.1, S.112-123
ISSN: 1569-190X
Fraunhofer IPK ()
welidng simulation; heat source calibration; gas metal arc welding; sensitivity analysis; distortion; heat source configuration; Schweißsimulation; Sysweld; Wärmequellenkonfiguration

The results of numerical welding simulations strongly depend on its temperature field. In the present paper, the temperature field of a pulsed gas metal arc weld of structural steel S355J2+N (ASTM A572 Gr. 50) with a thickness of 5 mm is experimentally and numerically investigated. In the case of temperature field validation, volumetric Gauss and double-ellipsoid Goldak heat sources are applied. Additionally, different heat source configurations, including adaptations of thermal conductivity, are analyzed regarding their influence on the calculation of welding-induced distortion. The investigations clarify the influence of heat source configurations on the calculated results, thus, contribute to an improved prediction of welding-induced distortion.