Effects of curvature-related DEM contact model on the macro- and micro-mechanical behaviours of granular soils
Abstract
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.
- Authors:
-
- South China Univ. of Technology (SCUT), Guangzhou (China); Oregon State Univ., Corvallis, OR (United States)
- Oregon State Univ., Corvallis, OR (United States)
- Powerchina Huadong Engineering Corporation Limited, Hangzhou (China); South China Univ. of Technology (SCUT), Guangzhou (China)
- Publication Date:
- Research Org.:
- Oregon State Univ., Corvallis, OR (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1613548
- Grant/Contract Number:
- FG36-08GO18179
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geotechnique
- Additional Journal Information:
- Journal Volume: 68; Journal Issue: 12; Journal ID: ISSN 0016-8505
- Publisher:
- ICE Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; Engineering; discrete-element modelling; fabric/structure of soils; particle-scale behaviour; statistical analysis
Citation Formats
Zhao, S., Evans, T. M., and Zhou, X. Effects of curvature-related DEM contact model on the macro- and micro-mechanical behaviours of granular soils. United States: N. p., 2018.
Web. doi:10.1680/jgeot.17.p.158.
Zhao, S., Evans, T. M., & Zhou, X. Effects of curvature-related DEM contact model on the macro- and micro-mechanical behaviours of granular soils. United States. https://doi.org/10.1680/jgeot.17.p.158
Zhao, S., Evans, T. M., and Zhou, X. Wed .
"Effects of curvature-related DEM contact model on the macro- and micro-mechanical behaviours of granular soils". United States. https://doi.org/10.1680/jgeot.17.p.158. https://www.osti.gov/servlets/purl/1613548.
@article{osti_1613548,
title = {Effects of curvature-related DEM contact model on the macro- and micro-mechanical behaviours of granular soils},
author = {Zhao, S. and Evans, T. M. and Zhou, X.},
abstractNote = {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.},
doi = {10.1680/jgeot.17.p.158},
journal = {Geotechnique},
number = 12,
volume = 68,
place = {United States},
year = {Wed Dec 12 00:00:00 EST 2018},
month = {Wed Dec 12 00:00:00 EST 2018}
}
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Works referencing / citing this record:
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