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Granular piston-probing in microgravity: powder compression, from densification to jamming

D'Angelo, Olfa and Horb, Anabelle and Cowley, Aidan and Sperl, Matthias and Kranz, W. Till (2022) Granular piston-probing in microgravity: powder compression, from densification to jamming. npj Microgravity, 8 (48), pp. 1-12. Nature Publishing Group. doi: 10.1038/s41526-022-00235-2. ISSN 2373-8065.

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Official URL: https://doi.org/10.1038/s41526-022-00235-2


The macroscopic response of granular solids is determined by the microscopic fabric of force chains, which, in turn, is intimately linked to the history of the solid. To query the influence of gravity on powder flow behavior, a granular material is subjected to compression by a piston in a closed container, on-ground and in microgravity (on parabolic flights). Results show that piston-probing densifies the packing, eventually leading to jamming of the material compressed by the piston, regardless of the gravitational environment. The onset of jamming is found to appear at lower packing fraction in microgravity (φμ−gJ=0.567±0.014) than on-ground (φgndJ=0.579±0.014). We interpret these findings as the manifestation of a granular fabric altered by the gravitational force field: in absence of a secondary load (due to gravitational acceleration) to stimulate reorganization in a different direction to the major compression stress, the particles’ configuration becomes stable at lower density, as the particles have no external drive to promote reorganization into a denser packing. This is coupled with a change in interparticular force balance which takes place under low gravity, as cohesive interactions become predominant. We propose a combination of microscopic and continuum arguments to rationalize our results.

Item URL in elib:https://elib.dlr.de/189741/
Document Type:Article
Title:Granular piston-probing in microgravity: powder compression, from densification to jamming
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
D'Angelo, OlfaFriedrich-Alexander-Universität Erlangen-Nürnberghttps://orcid.org/0000-0002-7218-4596UNSPECIFIED
Cowley, AidanEuropean Astronaut Centre (EAC), European Space Agency (ESA), Linder Höhe, D-51147 Cologne, Germanyhttps://orcid.org/0000-0001-8692-6207UNSPECIFIED
Sperl, MatthiasUNSPECIFIEDhttps://orcid.org/0000-0001-9525-0368UNSPECIFIED
Date:5 November 2022
Journal or Publication Title:npj Microgravity
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 1-12
Publisher:Nature Publishing Group
Keywords:3D printing, granular matter, microgravity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Model systems
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Sperl, Matthias
Deposited On:14 Nov 2022 10:14
Last Modified:22 Nov 2022 15:50

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