Modeling of Laser Beam Absorption in a Polymer Powder Bed

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Osmanlic F, Wudy K, Laumer T, Schmidt M, Drummer D, Körner C
Zeitschrift: Polymers
Verlag: MDPI
Jahr der Veröffentlichung: 2018
Band: 10
Heftnummer: 7
ISSN: 2073-4360
Sprache: Englisch


Abstract

In order to understand the absorption characteristic, a ray trace model is developed by taking into account the reflection, absorption and refraction. The ray paths are resolved on a sub-powder grid. For validation, the simulation results are compared to analytic solutions of the irradiation of the laser beam onto a plain surface. In addition, the absorptance, reflectance and transmittance of PA12 powder layers measured by an integration sphere setup are compared with the numerical results of our model. It is shown that the effective penetration depth can be lower than the penetration depth in bulk material for polymer powders and, therefore, can increase the energy density at the powder bed surface. The implications for modeling of the selective laser sintering (SLS) process and the processability of fine powder distributions and high powder bed densities are discussed.


FAU-Autoren / FAU-Herausgeber

Drummer, Dietmar Prof. Dr.-Ing.
Lehrstuhl für Kunststofftechnik
Körner, Carolin Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Laumer, Tobias
Lehrstuhl für Photonische Technologien
Osmanlic, Fuad
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Schmidt, Michael Prof. Dr.-Ing.
Lehrstuhl für Photonische Technologien
Wudy, Katrin Dr.-Ing.
Sonderforschungsbereich 814 Additive Fertigung


Zitierweisen

APA:
Osmanlic, F., Wudy, K., Laumer, T., Schmidt, M., Drummer, D., & Körner, C. (2018). Modeling of Laser Beam Absorption in a Polymer Powder Bed. Polymers, 10(7). https://dx.doi.org/10.3390/polym10070784

MLA:
Osmanlic, Fuad, et al. "Modeling of Laser Beam Absorption in a Polymer Powder Bed." Polymers 10.7 (2018).

BibTeX: 

Zuletzt aktualisiert 2018-16-11 um 12:47