The “Slugs-Test” for Extrusion-Based Additive Manufacturing (2021-05)¶

Protocol, Analysis and Practical Limits

10.1016/j.cemconcomp.2021.104074

Ducoulombier Nicolas, Mesnil Romain, Carneau Paul, Demont Léo, Bessaies-Bey Hela, Caron Jean-François, Roussel Nicolas
Journal Article - Cement and Concrete Composites, Vol. 121

Abstract

This paper introduces a novel rheological technique allowing for the assessment of printable materials yield stress at nozzle exit in the case of extrusion-based 3D printing. This technique is derived from the analysis of the specific gravity-induced non-Newtonian flow that takes place at nozzle exit, which is at the origin of the formation of material drops or so-called slugs. A simple connected balance located below the nozzle gives access to the slugs mass distribution, the average value and the variability of which allow for the computation of the yield stress and, in parallel, for the assessment of the material homogeneity. In this paper, this method is first experimentally validated on simple materials in simple extruders before it is applied to a real printing system. The equations allowing for the yield stress computation are derived. The accuracy of the technique and its range of applicability are discussed

¶

12 References

62 Citations

BibTeX

@article{duco_mesn_carn_demo.2021.TSTfEBAM,
  author            = "Nicolas Ducoulombier and Romain Mesnil and Paul Carneau and Léo Demont and Hela Bessaies-Bey and Jean-François Caron and Nicolas Roussel",
  title             = "The “Slugs-Test” for Extrusion-Based Additive Manufacturing: Protocol, Analysis and Practical Limits",
  doi               = "10.1016/j.cemconcomp.2021.104074",
  year              = "2021",
  journal           = "Cement and Concrete Composites",
  volume            = "121",
}

Formatted Citation

IEEE

N. Ducoulombier, “The “Slugs-Test” for Extrusion-Based Additive Manufacturing: Protocol, Analysis and Practical Limits”, Cement and Concrete Composites, vol. 121, 2021, doi: 10.1016/j.cemconcomp.2021.104074.

CMOS

Ducoulombier, Nicolas, Romain Mesnil, Paul Carneau, Léo Demont, Hela Bessaies-Bey, Jean-François Caron, and Nicolas Roussel. “The “Slugs-Test” for Extrusion-Based Additive Manufacturing: Protocol, Analysis and Practical Limits”. Cement and Concrete Composites 121 (2021). https://doi.org/10.1016/j.cemconcomp.2021.104074.