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Stress propagation in locally loaded packings of disks and pentagons.

Publication ,  Journal Article
Kozlowski, R; Zheng, H; Daniels, KE; Socolar, JES
Published in: Soft matter
November 2021

The mechanical strength and flow of granular materials can depend strongly on the shapes of individual grains. We report quantitative results obtained from photoelasticimetry experiments on locally loaded, quasi-two-dimensional granular packings of either disks or pentagons exhibiting stick-slip dynamics. Packings of pentagons resist the intruder at significantly lower packing fractions than packings of disks, transmitting stresses from the intruder to the boundaries over a smaller spatial extent. Moreover, packings of pentagons feature significantly fewer back-bending force chains than packings of disks. Data obtained on the forward spatial extent of stresses and back-bending force chains collapse when the packing fraction is rescaled according to the packing fraction of steady state open channel formation, though data on intruder forces and dynamics do not collapse. We comment on the influence of system size on these findings and highlight connections with the dynamics of the disks and pentagons during slip events.

Duke Scholars

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Published In

Soft matter

DOI

EISSN

1744-6848

ISSN

1744-683X

Publication Date

November 2021

Volume

17

Issue

44

Start / End Page

10120 / 10127

Related Subject Headings

  • Chemical Physics
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences
 

Citation

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Kozlowski, R., Zheng, H., Daniels, K. E., & Socolar, J. E. S. (2021). Stress propagation in locally loaded packings of disks and pentagons. Soft Matter, 17(44), 10120–10127. https://doi.org/10.1039/d1sm01137e
Kozlowski, Ryan, Hu Zheng, Karen E. Daniels, and Joshua E. S. Socolar. “Stress propagation in locally loaded packings of disks and pentagons.Soft Matter 17, no. 44 (November 2021): 10120–27. https://doi.org/10.1039/d1sm01137e.
Kozlowski R, Zheng H, Daniels KE, Socolar JES. Stress propagation in locally loaded packings of disks and pentagons. Soft matter. 2021 Nov;17(44):10120–7.
Kozlowski, Ryan, et al. “Stress propagation in locally loaded packings of disks and pentagons.Soft Matter, vol. 17, no. 44, Nov. 2021, pp. 10120–27. Epmc, doi:10.1039/d1sm01137e.
Kozlowski R, Zheng H, Daniels KE, Socolar JES. Stress propagation in locally loaded packings of disks and pentagons. Soft matter. 2021 Nov;17(44):10120–10127.
Journal cover image

Published In

Soft matter

DOI

EISSN

1744-6848

ISSN

1744-683X

Publication Date

November 2021

Volume

17

Issue

44

Start / End Page

10120 / 10127

Related Subject Headings

  • Chemical Physics
  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
  • 09 Engineering
  • 03 Chemical Sciences
  • 02 Physical Sciences