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This summary is machine-generated.

Confining a flexible rod in granular materials causes jamming and reordering. Critical rod length determines jamming, with granular ordering influencing rod deformation and stress relaxation.

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Area of Science:

  • Physics of granular materials
  • Soft matter physics
  • Nonlinear mechanics

Background:

  • Confinement of slender bodies in granular media leads to complex interactions.
  • Understanding elastogranular coupling is crucial for predicting material behavior.

Purpose of the Study:

  • To investigate the critical length of a slender body (elastica) required to induce jamming in a granular array.
  • To explore how granular packing density and elastica length influence jamming and deformation.
  • To elucidate the coupling between elastica deformation and granular rearrangement.

Main Methods:

  • Systematic variation of initial grain packing density.
  • Systematic variation of the length of the confined elastica.
  • Observation and analysis of stress localization, jamming, reordering, and grain dislodging.

Main Results:

  • Identified a critical elastica length for inducing jamming in the granular medium.
  • Demonstrated that folds in the elastica couple with grain boundaries, localizing stress.
  • Observed a divergence in elastica deformation length above the jamming threshold, coupled with grain motion.
  • Showed that overconfinement leads to grain dislodging as a stress relaxation mechanism.

Conclusions:

  • Granular ordering dictates the deformation of confined slender structures.
  • Elastogranular interactions exhibit intricate coupling, influencing both the elastica and the granular medium.
  • The study provides insights into stress localization and energy dissipation in confined granular systems.