A 3D DEM simulation to study the influence of material and process parameters on spreading of metallic powder in additive manufacturing

Autor: Kevin Marchais, Jérémie Girardot, Ivan Iordanoff, Charlotte Metton
Přispěvatelé: Institut de Mécanique et d'Ingénierie (I2M), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Safran Tech
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Work (thermodynamics)
Materials science
0211 other engineering and technologies
Computational Mechanics
02 engineering and technology
[SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph]
01 natural sciences
Phase (matter)
Surface roughness
[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
0101 mathematics
Composite material
Inertial confinement fusion
021101 geological & geomatics engineering
Civil and Structural Engineering
Fluid Flow and Transfer Processes
Numerical Analysis
Mécanique: Mécanique des solides [Sciences de l'ingénieur]
Génie des procédés [Sciences de l'ingénieur]
Adhesion
Dissipation
Discrete element method
010101 applied mathematics
Computational Mathematics
Modeling and Simulation
Metal powder
Zdroj: Computational Particle Mechanics
Computational Particle Mechanics, 2021, pp.1. ⟨10.1007/s40571-020-00380-z⟩
ISSN: 2196-4386
Popis: International audience; The aim of this work is to understand the granular behavior of metal powder during the spreading phase of the LBM process in order to study the effect of powder properties and process parameters on the quality of the layer deposited before laser fusion. This is a numerical work performed with simulations based on the discrete element method where each powder grain is simulated. The numerical model takes into account different interactions such as repulsion, dissipation, friction and adhesion that occur when there is contact between two bodies. The powder grains are assumed to be perfectly spherical. The surface roughness of the plate and spreader is taken into account in the simulations as it has a significant impact on the powder bed spreading. The effect of material parameters such as friction and adhesion is studied. The influence of the spreading speed is also studied. The results show that different friction values give the same results on the final properties of the powder bed while adhesion plays a significant role. Finally, lower spreading speed result in a better powder bed.
Databáze: OpenAIRE
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