Analysis of radiation pressure and aerodynamic forces acting on powder grains in powder-based additive manufacturing
Haeri, Sina and Haeri, Soroush and Hanson, Jack and Lotfian, Saeid (2020) Analysis of radiation pressure and aerodynamic forces acting on powder grains in powder-based additive manufacturing. Powder Technology, 368. pp. 125-129. ISSN 0032-5910 (https://doi.org/10.1016/j.powtec.2020.04.031)
Preview |
Text.
Filename: Haeri_etal_PT_2020_Analysis_of_radiation_pressure_and_aerodynamic_forces_acting_on_powder_grains.pdf
Accepted Author Manuscript License: Download (5MB)| Preview |
Abstract
Selection of process parameters is an important step in Powder-Based Additive Manufacturing (PBAM) of metals. In order to achieve an optimal parameter set, current literature is mainly focused on the understanding of powder dynamics by analysing the aerodynamic forces. In this letter, however, we show the importance of the laser induced force (radiation pressure) on the powder dynamics. Generalised Lorenz-Mie theory has been employed to accurately estimate the radiation pressure and it is shown that its magnitude is significant in comparison to various aerodynamic forces and the grains weight, hence, can significantly contribute to denudation and spatter observed in the manufacturing process. Furthermore, the importance of compressibility and rarefaction effects on the magnitude of drag and lift forces that a particle experiences is demonstrated by estimating the Ma and Kn numbers under process conditions, which directly impact the powder dynamics.
ORCID iDs
Haeri, Sina ORCID: https://orcid.org/0000-0001-8882-4685, Haeri, Soroush, Hanson, Jack and Lotfian, Saeid ORCID: https://orcid.org/0000-0001-8542-933X;-
-
Item type: Article ID code: 72188 Dates: DateEvent15 May 2020Published17 April 2020Published Online10 April 2020AcceptedSubjects: Technology > Mechanical engineering and machinery Department: Strategic Research Themes > Ocean, Air and Space
Faculty of Engineering > Mechanical and Aerospace Engineering
Faculty of Engineering > Naval Architecture, Ocean & Marine EngineeringDepositing user: Pure Administrator Date deposited: 28 Apr 2020 14:48 Last modified: 12 Oct 2024 00:27 URI: https://strathprints.strath.ac.uk/id/eprint/72188