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Modelling and dynamical simulation of laser beam welding

: Schulz, W.; Michel, J.; Eppelt, U.; Maier, C.

Vincenzini, P.:
Computational modeling and simulation of materials III. Part B: Advances in Science and Technology : Proceedings of the 3rd International Conference on "Computational Modeling and Simulation of Materials" Acireale, Sicily, Italy, May 30 - June 4, 2004
Faenza: Techna Srl, 2004 (Advances in science and technology 43)
ISBN: 88-86538-46-4
International Conference Computational Modeling and Simulation of Materials <3, 2004, Acireale, Sicily>
Conference Paper
Fraunhofer ILT ()

Laser beam welding is a thermal joining process widely used in welding of tailored blanks and contour welding applications. However, there are gaps in understanding the dynamics of the process, especially related to the weld quality. This work describes the advances in fundamental physical modelling and mathematical analysis of the Free Boundary Problem as well as monitoring and control of time varying processes such as contour welding. The acceleration/deacceleration of the melt film by evaporation/recondensation and the flow of metal vapor are the physical phenomena relevant to the formation of pores in the weld seam. The dynamic model predicts the formation of pores sets in or is suspended depending on modulation frequency for the laser power.