Mechanical transitional behavior of binary mixtures via DEM: Effect of differences in contact-type friction coefficients

This report presents a numerical investigation of the shear behavior of binary mixtures via a two-dimensional discrete element method. The effect of the coarse particle content on the peak shear strength of mixtures is investigated for different contact-type friction coefficients. A detailed analysi...

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Bibliographic Details
Published in:Computers and geotechnics 2017-05, Vol.85, p.1-14
Main Authors: Gong, Jian, Liu, Jun
Format: Article
Language:English
Subjects:
Analysis
Anisotropic analysis
Anisotropy
Binary mixtures
Coarsening
Coefficients
Contact types
Discrete element method
Drained biaxial tests
Friction
Granular mixtures
Mechanical properties
Peak shear strength
Shear strength
Thresholds
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Summary:This report presents a numerical investigation of the shear behavior of binary mixtures via a two-dimensional discrete element method. The effect of the coarse particle content on the peak shear strength of mixtures is investigated for different contact-type friction coefficients. A detailed analysis on the anisotropies enables us to understand the microscopic mechanisms that result in the dependency of the peak shear strengths on the coarse particle content. The contributions of different contact types to the peak shear strength are quantified. Lastly, the inter-particles structures are examined when the binary mixtures become coarse-particle-supported structures.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2016.12.009