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Related Experiment Video

Updated: May 2, 2026

Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Force-chain distributions in granular systems.

Ling Zhang1, Yujie Wang1, Jie Zhang2

  • 1Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|March 4, 2014
PubMed
Summary

We experimentally studied force chains in granular materials. Ignoring shear-induced anisotropy reveals a universal relationship between mean force-chain length and particle contact number, independent of system size.

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Area of Science:

  • Physics
  • Materials Science
  • Geophysics

Background:

  • Granular materials exhibit complex force transmission through force chains.
  • Understanding force chain distributions is crucial for predicting material behavior under stress.
  • Sheared and isotropically compressed systems show distinct force chain properties.

Purpose of the Study:

  • To experimentally investigate force chain distributions in granular materials.
  • To determine the relationship between force chain length and particle contact number.
  • To analyze the impact of shear-induced anisotropy on force chain networks.

Main Methods:

  • Experimental analysis of granular materials under different compression states.
  • Measurement of force chain distributions.
  • Statistical analysis of force chain length and particle contact number.

Main Results:

  • Force chain distributions differ between sheared and isotropically compressed granular systems.
  • A system-size-independent relationship between mean force-chain length (Lm) and average contact number (Z) was established by disregarding anisotropy.
  • Force chain distributions were found to be unrelated to exponential stress distributions.

Conclusions:

  • Shear-induced anisotropy significantly influences force chain networks in granular materials.
  • A generalized relationship exists between force chain length and particle connectivity in granular systems.
  • Stress distributions do not directly correlate with force chain distribution patterns.