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Updated: Jun 10, 2025

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Numerical model for solid-like and fluid-like behavior of granular flows.

Yadong Wang1, Wei Wu1

  • 1Institute of Geotechnical Engineering, Boku University, Feistmantelstraße 4, 1180 Vienna, Austria.

Acta Geotechnica
|October 18, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a new model for granular materials, combining solid-like and fluid-like behaviors. The model accurately simulates transitions between different flow states in granular materials.

Keywords:
Fluid-like flowGranular materialHypoplastic modelRheologySolid-like flow

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Area of Science:

  • Geophysics
  • Continuum Mechanics
  • Material Science

Background:

  • Granular materials exhibit complex behaviors, transitioning between solid-like and fluid-like states.
  • Existing models often struggle to capture this transition effectively.
  • Understanding these behaviors is crucial for various engineering applications.

Purpose of the Study:

  • To develop a unified constitutive model for granular materials.
  • To accurately represent both quasi-static (solid-like) and rapid (fluid-like) flow regimes.
  • To capture the transition between these distinct behaviors.

Main Methods:

  • Decomposition of the stress tensor into quasi-static and collisional components.
  • Application of a hypoplastic model for solid-like behavior.
  • Utilization of a modified rheology model for fluid-like behavior.

Main Results:

  • The proposed model successfully integrates solid-like and fluid-like characteristics.
  • Numerical simulations demonstrate the model's ability to capture transitions in granular flow.
  • Element tests validate the model's performance.

Conclusions:

  • The developed constitutive model provides a robust framework for simulating granular material dynamics.
  • It effectively bridges the gap between solid and fluid behaviors in granular flows.
  • This model offers improved predictive capabilities for granular material simulations.