Universität zu Köln

Fischer, David, Stannarius, Ralf, Tell, Karsten, Yu, Peidong and Sperl, Matthias (2021). Force chains in crystalline and frustrated packing visualized by stress-birefringent spheres. Soft Matter, 17 (16). S. 4317 - 4328. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1744-6848

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Abstract

Force networks play an important role in the stability of configurations when granular material is packed into a container. These networks can redirect part of the weight of grains inside a container to the side walls. We employ monodisperse stress-birefringent spheres to visualize the contact forces in a quasi-2D and a nearly-2D configuration of these spheres in a thin cuboid cell. The packing structures are particularly simple: a hexagonal lattice in the ground state when the cell width is equal to the sphere diameter, and a frustrated, slightly distorted lattice in thicker cells. The force redistribution is substantially changed by this geometrical modification. In both cases, we observe an 'inverse' Janssen effect with the pressure decreasing from the top to the bottom of the container when the material is loaded with a weight on top of the vessel.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Fischer, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Stannarius, Ralf UNSPECIFIED UNSPECIFIED UNSPECIFIED Tell, Karsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Yu, Peidong UNSPECIFIED UNSPECIFIED UNSPECIFIED Sperl, Matthias UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-582886
DOI:	10.1039/d0sm02048f
Journal or Publication Title:	Soft Matter
Volume:	17
Number:	16
Page Range:	S. 4317 - 4328
Date:	2021
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1744-6848
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Multidisciplinary; Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58288