Effects of curvature-related DEM contact model on the macro- and micro-mechanical behaviours of granular soils
- South China Univ. of Technology (SCUT), Guangzhou (China); Oregon State Univ., Corvallis, OR (United States); DOE/OSTI
- Oregon State Univ., Corvallis, OR (United States)
- Powerchina Huadong Engineering Corporation Limited, Hangzhou (China); South China Univ. of Technology (SCUT), Guangzhou (China)
The presented paper conducted a comprehensive comparison between the Hertz-Mindlin model and the linear spring model in true triaxial shear simulations of granular soils using the discrete element method (DEM). The no-slip Hertz-Mindlin model for general elastic non-spherical particles with smooth surfaces was revisited, and implemented for superellipsoidal particles in an in-house DEM code. Three groups of specimens with a grain size distribution of Ottawa 20-30 sands, consisting of spheres, ellipsoids, and superellipsoids, respectively, were subjected to triaxial shear DEM simulations with the Hertz-Mindlin model and the linear spring model. The corresponding mechanical behaviours were examined in terms of a series of macro-and micro-parameters. It is found that the linear spring model is able to resemble the Hertz-Mindlin model on aspects of both microscopic and macroscopic mechanical behaviours of granular media with spherical and/or non-spherical particles. This finding suggests that the linear spring model can be used to investigate micro-mechanical behaviours of granular soils even with complex particle shapes.
- Research Organization:
- Oregon State Univ., Corvallis, OR (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- FG36-08GO18179
- OSTI ID:
- 1613548
- Journal Information:
- Geotechnique, Journal Name: Geotechnique Journal Issue: 12 Vol. 68; ISSN 0016-8505
- Publisher:
- ICE PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
A poly‐superellipsoid‐based approach on particle morphology for DEM modeling of granular media
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journal | July 2019 |
Universality of internal structure characteristics in granular media under shear
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journal | January 2020 |
Numerical Simulation and Microscopic Stress Mechanism for the Microscopic Pore Deformation during Soil Compression
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journal | March 2019 |
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