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Related Experiment Video

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Quantifying Three-Dimensional Cell Migration Within and Into Granular Hydrogel Biomaterials

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Published on: March 7, 2025

Force-chain evolution in a two-dimensional granular packing compacted by vertical tappings.

Naoki Iikawa¹, M M Bandi², Hiroaki Katsuragi¹

¹Department of Earth and Environmental Sciences, Nagoya University, Furocho, Chikusa, Nagoya, Aichi 464-8601, Japan.

Physical Review. E

|May 20, 2018

Summary

This summary is machine-generated.

Compacting granular materials with tapping randomizes grain and force-chain structures. Force chains become more disordered as grain configurations become more isotropic and interparticle forces increase.

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Area of Science:

Physics
Materials Science
Statistical Mechanics

Background:

Granular materials exhibit complex behaviors due to interparticle interactions.
Understanding force chains is crucial for predicting material properties.

Purpose of the Study:

To investigate the evolution of force chains during compaction of granular packing.
To correlate grain configuration isotropy with force-chain structure.

Main Methods:

Experimental study using photoelastic disks in a 2D vertically-tapped granular packing.
Quantification of grain configuration isotropy using deviator anisotropy from fabric tensor.
Measurement of interparticle forces and force-chain orientational order parameter.

Main Results:

Interparticle forces increase and saturate with increasing packing fraction.
Grain configurations and force chains become more isotropic during compaction.
Total force chain length remains constant.
Positive correlation between grain isotropy and force-chain disorder.
Negative correlation between interparticle force and force-chain disorder.

Conclusions:

Compaction-induced isotropy in grain configurations leads to disorder in force-chain orientations.
Increasing interparticle forces correlate with decreasing force-chain order.
Observed relations are independent of particle motion modes.