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Modeling the Simultaneous Effects of Particle Size and Porosity in Simulating Geo-Materials.

Jichao Sun1, Yuefei Huang2

  • 1School of Water Resource & Environment, China University of Geosciences, Beijing 100083, China.

Materials (Basel, Switzerland)
|February 25, 2022
PubMed
Summary

This study introduces a new method using joint soil particles to improve particle discrete element method (PDEM) simulations of geological materials. This enhances accuracy in modeling soil behavior and porosity for better real-world applications.

Keywords:
joint particlenumerical simulationparticle discrete element methodparticle size and gradation

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Area of Science:

  • Geotechnical Engineering
  • Computational Mechanics
  • Geological Modeling

Background:

  • Particle discrete element method (PDEM) is crucial for simulating soil and rock behavior.
  • Current PDEM models face limitations in accurately representing particle shape, size, and volume overlap, leading to discrepancies in geological simulations.

Purpose of the Study:

  • To address the shortcomings of traditional PDEM by developing a more realistic simulation method.
  • To enhance the accuracy of geological body simulations using joint soil particles.

Main Methods:

  • Development of a rotation calculation model for joint soil particles.
  • Implementation of a pixel counting method to accurately calculate porosity.
  • Utilizing joint particles to overcome limitations of single spheres/ellipsoids in PDEM.

Main Results:

  • Successfully simulated geological materials with joint soil particles, achieving realistic gradation curves.
  • Accurately calculated the porosity of the simulated geological body by accounting for overlapping particle volumes.
  • Overcame the limitations of sphere/ellipsoid replacement and diameter-based size definition in PDEM.

Conclusions:

  • The proposed method significantly improves the accuracy of PDEM simulations for geological materials.
  • The joint particle approach offers a more realistic representation of soil and rock behavior.
  • This research expands the application scope of PDEM in geological, geotechnical, and petroleum engineering.