The Slug-Test (2020-07)¶

In-Line-Assessment of Yield-Stress for Extrusion-Based Additive Manufacturing

Ducoulombier Nicolas, Carneau Paul, Mesnil Romain, Demont Léo, Caron Jean-François, Roussel Nicolas
Contribution - Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication, pp. 216-224

Abstract

Successful and efficient fabrication using robotic extrusion of cementitious materials mainly relies on the mastering of the printable material fresh state behavior. This paper tackles this aspect by introducing a novel rheological apparatus dedicated to the yield stress measurement at nozzle exit in extrusion-based manufacturing. It is based on the analysis of the specific gravity-induced flow that takes place at nozzle exit, which is at the origin of the formation of material drops or so-called “slugs”. Using a simple connected balance with a high measurement frequency gives access to these slugs average mass and, in turn, to the yield stress. Due to its convenience, the protocol is appropriate for setting the printing parameters according to the yield stress measurement at the nozzle exit in order to ensure successful fabrication.

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11 References

25 Citations

BibTeX

@inproceedings{duco_carn_mesn_demo.2020.TST,
  author            = "Nicolas Ducoulombier and Paul Carneau and Romain Mesnil and Léo Demont and Jean-François Caron and Nicolas Roussel",
  title             = "The Slug-Test: In-Line-Assessment of Yield-Stress for Extrusion-Based Additive Manufacturing",
  doi               = "10.1007/978-3-030-49916-7_22",
  year              = "2020",
  volume            = "28",
  pages             = "216--224",
  booktitle         = "Proceedings of the 2nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020",
  editor            = "Freek Paul Bos and Sandra Simaria de Oliveira Lucas and Robert Johannes Maria Wolfs and Theo A. M. Salet",
}

Formatted Citation

IEEE

N. Ducoulombier, P. Carneau, R. Mesnil, L. Demont, J.-F. Caron and N. Roussel, “The Slug-Test: In-Line-Assessment of Yield-Stress for Extrusion-Based Additive Manufacturing”, in Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, 2020, vol. 28, pp. 216–224. doi: 10.1007/978-3-030-49916-7_22.

CMOS

Ducoulombier, Nicolas, Paul Carneau, Romain Mesnil, Léo Demont, Jean-François Caron, and Nicolas Roussel. “The Slug-Test: In-Line-Assessment of Yield-Stress for Extrusion-Based Additive Manufacturing”. In Proceedings of the 2^nd RILEM International Conference on Concrete and Digital Fabrication: Digital Concrete 2020, edited by Freek Paul Bos, Sandra Simaria de Oliveira Lucas, Robert Johannes Maria Wolfs, and Theo A. M. Salet, 28:216–24, 2020. https://doi.org/10.1007/978-3-030-49916-7_22.