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Transient process simulation of heat transfer in laser beam welding with an equivalent heat source

  • A multi-physics modelling framework developed for the prediction of the three-dimensional transient temperature field of the laser welding process is presented. The numerical model consists of two studies. In the first study, a steady-state CFD process simulation of full-penetration keyhole laser beam welding was performed. Considering the effects of latent heat, natural and thermo-capillary convection and temperature-dependent material properties up to evaporation temperature the local weld pool geometry and temperature field were obtained. These results were used in the second subsequent study, as an equivalent volumetric heat source, by the prediction of the transient thermal cycle during and after fusion welding. Here the energy input and the movement of the heat source were realized by a novel technique, making use of pointwise constraints and a moving mesh provided with helper lines and additional remeshing condition. The numerically calculated results were compared toA multi-physics modelling framework developed for the prediction of the three-dimensional transient temperature field of the laser welding process is presented. The numerical model consists of two studies. In the first study, a steady-state CFD process simulation of full-penetration keyhole laser beam welding was performed. Considering the effects of latent heat, natural and thermo-capillary convection and temperature-dependent material properties up to evaporation temperature the local weld pool geometry and temperature field were obtained. These results were used in the second subsequent study, as an equivalent volumetric heat source, by the prediction of the transient thermal cycle during and after fusion welding. Here the energy input and the movement of the heat source were realized by a novel technique, making use of pointwise constraints and a moving mesh provided with helper lines and additional remeshing condition. The numerically calculated results were compared to experimentally observed weld pool shapes and time-temperature curves and show a very good agreement.zeige mehrzeige weniger

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Metadaten
Autor*innen:Antoni ArtinovORCiD
Koautor*innen:Marcel Bachmann, Michael Rethmeier
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2017
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Equivalent volumetric heat source; High power laser beam welding; Moving mesh; Pointwise constraints; Transient heat transfer
Veranstaltung:COMSOL Conference
Veranstaltungsort:Rotterdam, The Netherlands
Beginndatum der Veranstaltung:18.10.2017
Enddatum der Veranstaltung:20.10.2017
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:23.10.2017
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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