Structural fluctuations in thin cohesive particle layers in powder-based additive manufacturing

Roy S, Xiao H, Angelidakis V, Pöschel T (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 26

Article Number: 43

Journal Issue: 2

DOI: 10.1007/s10035-024-01410-w

Abstract

Producing dense and homogeneous powder layers with smooth free surface is challenging in additive manufacturing, as interparticle cohesion can strongly affect the powder packing structure and therefore influence the quality of the end product. We use the Discrete Element Method to simulate the spreading process of spherical powders and examine how cohesion influences the characteristics of the packing structure with a focus on the fluctuation of the local morphology. As cohesion increases, the overall packing density decreases, and the free surface roughness increases, which is calculated from digitized surface height distributions. Local structural fluctuations for both quantities are examined through the local packing anisotropy on the particle scale, obtained from Voronoï tessellation. The distributions of these particle-level metrics quantify the increasingly heterogeneous packing structure with clustering and changing surface morphology.

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How to cite

APA:

Roy, S., Xiao, H., Angelidakis, V., & Pöschel, T. (2024). Structural fluctuations in thin cohesive particle layers in powder-based additive manufacturing. Granular Matter, 26(2). https://doi.org/10.1007/s10035-024-01410-w

MLA:

Roy, Sudeshna, et al. "Structural fluctuations in thin cohesive particle layers in powder-based additive manufacturing." Granular Matter 26.2 (2024).

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