Transient numerical simulation of CO2 laser fusion cutting of metal sheets: Simulation model and process dynamics

Kohl S, Leitz KH, Schmidt M (2013)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2013

Publisher: Springer

City/Town: London

Pages Range: 403 - 406

Conference Proceedings Title: Proceedings of the 37th International MATADOR Conference

Event location: Manchester GB

ISBN: 978-1-4471-4479-3

DOI: 10.1007/978-1-4471-4480-9

Abstract

Simulations are a versatile tool of increasing importance for profound analysis and comprehensive understanding of laser-based material processing. Based on our simulation model of laser-matter interaction, we developed a numerical three-dimensional model for the transient simulation of fusion cutting of sheet metal. This model is based on the finite-volume method (FVM) and covers various laser-metal interaction mechanisms, such as multiple surface reflection and absorption according to Fresnel, but also more complex interactions like absorption in the metal plasma. In this study, we focused on a Gaussian shaped CO2 laser beam applied for the cutting and steel sheets. The implemented physics include fluid and vapor dynamics according to Navier-Stokes, heat conduction, the surface tension of the liquid-vapor interface and the modeling of the enthalpies of fusion and vaporization. As accurate input parameters are crucial for any simulation, special focus was put on the implementation of material properties at temperatures around the melting point. The additional modeling of inert process gas ensures realistic blow-out of the molten material. Furthermore, adaptive meshing enables high calculation accuracy in the areas of interest while minimizing computation time drastically.

Authors with CRIS profile

Stefanie Kohl Lehrstuhl für Photonische Technologien Karl-Heinz Leitz Lehrstuhl für Photonische Technologien Michael Schmidt Lehrstuhl für Photonische Technologien

How to cite

APA:

Kohl, S., Leitz, K.-H., & Schmidt, M. (2013). Transient numerical simulation of CO2 laser fusion cutting of metal sheets: Simulation model and process dynamics. In Srichand Hinduja and Lin Li (Eds.), Proceedings of the 37th International MATADOR Conference (pp. 403 - 406). Manchester, GB: London: Springer.

MLA:

Kohl, Stefanie, Karl-Heinz Leitz, and Michael Schmidt. "Transient numerical simulation of CO2 laser fusion cutting of metal sheets: Simulation model and process dynamics." Proceedings of the 37th International MATADOR Conference, Manchester Ed. Srichand Hinduja and Lin Li, London: Springer, 2013. 403 - 406.

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