Particle-based simulations of powder coating in additive manufacturing suggest increase in powder bed roughness with coating speed

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Ribeiro Parteli EJ, Pöschel T
Zeitschrift: EPJ Web of Conferences
Jahr der Veröffentlichung: 2017
Band: 140
ISSN: 2100-014X
Sprache: Englisch


Abstract



The development of reliable strategies to optimize part production in additive manufacturing technologies hinges, to a large extent, on the quantitative understanding of the mechanical behavior of the powder particles during the application process. Since it is difficult to acquire this understanding based on experiments alone, a particle- based numerical tool for the simulation of powder application is required. In the present work, we develop such a numerical tool and apply it to investigate the characteristics of the powder layer de posited onto the part using a roller as the coating system. In our simulations, the complex geometric shapes of the powder particles are taken explicitly into account. Our results show that increasing the coating speed leads to an increase in the surface roughness of the powder bed, which is known to affect part quality. We also find that, surprisingly, powders with broader size distributions may lead to larger values of surface roughness as the smallest particles are most prone to form large agglomerates thus increasing the packing’s porosity. Moreover, we find that the load on the part may vary over an order of magnitude during the coating process owing to the strong inhomogeneity of inter-particle forces in the granular packing. Our numerical tool can be used to assist — and partially replace — experimental investigations of the flowability and packing behavior of different powder systems as a function of material and process parameters.



 



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Pöschel, Thorsten Prof. Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems
Ribeiro Parteli, Eric Josef Dr.
Lehrstuhl für Multiscale Simulation of Particulate Systems


Zitierweisen

APA:
Ribeiro Parteli, E.J., & Pöschel, T. (2017). Particle-based simulations of powder coating in additive manufacturing suggest increase in powder bed roughness with coating speed. EPJ Web of Conferences, 140. https://dx.doi.org/10.1051/epjconf/201714015013

MLA:
Ribeiro Parteli, Eric Josef, and Thorsten Pöschel. "Particle-based simulations of powder coating in additive manufacturing suggest increase in powder bed roughness with coating speed." EPJ Web of Conferences 140 (2017).

BibTeX: 

Zuletzt aktualisiert 2018-08-09 um 14:10