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Particle-based simulations and dimensional analysis of selective laser sintering of PA12 powders

: Bierwisch, C.; Mohseni-Mofidi, S.; Dietemann, B.; Rudloff, J.; Baumann, S.; Popp, K.; Lang, M.

Volltext (PDF; )

Auricchio, F. ; International Center for Numerical Methods in Engineering -CIMNE-:
II International Conference on Simulation for Additive Manufacturing, Sim-AM 2019 : 11-13 September 2019, Pavia, Italy
Barcelona: CIMNE, 2019
ISBN: 978-84-949194-8-0
International Conference on Simulation for Additive Manufacturing (Sim-AM) <2, 2019, Pavia>
Deutsche Forschungsgemeinschaft DFG
BI 1859/2-1
Materials for Additive Manufacturing
Deutsche Forschungsgemeinschaft DFG
LA 4328/1-1
Materials for Additive Manufacturing
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWM ()
melt track; grain scale; mesh free simulation; smoothed particle hydrodynamics; experimental validation; dimensionless numbers

A numerical model based on the Smoothed particle Hydrodynamics (SPH) method is developed for 2D and 3D simulations of the laser sintering process of polyamide 12 (PA12) powder on the grain scale. Melt track simulations yield detailed insights in the visco-thermal dynamics of the process including the porosity evolution. The simulations are validated by measurements of the transient surface temperature. A dimensional analysis of the process allows for quantification of the importance of all infolved physical mechanisms and predicts the magnitudes of the observable phyical quantitis with good accuracy.