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.…
Autor*innen: | Antoni ArtinovORCiD |
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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 |