A parametric study has been performed for determining the effect of laser welding parameters on the distortion of thin ship steel panels. The parameters examined were the laser power, the speed of the welding process and the keyhole radius. A three-dimensional finite element model has been developed for the simulation of the laser welding process and for the prediction of the panel distortion. The finite element calculations were performed using the SYSWELD F.E code, with the capability to consider thermal, metallurgical and mechanical aspects. The simulation of the laser welding process was performed using a nonlinear heat transfer analysis, based on a keyhole formation model, and a coupled transient thermo-mechanical analysis. The analysis takes into account the change of the material properties during the cooling stage due to metallurgical transformations. The metallurgical transformations were determined from the material's Continuous Cooling Transformation diagram (CCT). The geometry examined was a butt-joint specimen consisted of thick AH36 shipbuilding steel plates. Experimental and numerical results show good agreement.
Effect of laser welding parameters on the distortion of thin ship panels
Einfluß der Laserschweißparameter auf den Verzug dünner Schiffspaneele
2002
10 Seiten, 7 Bilder, 1 Tabelle, 16 Quellen
Conference paper
English
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