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Modeling shear behavior and strain localization in cemented sands by two-dimensional distinct element method analyses
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Jiang, Mingjing, Yan, H. B., Zhu, Hehua and Utili, Stefano (2011) Modeling shear behavior and strain localization in cemented sands by two-dimensional distinct element method analyses. Computers and Geotechnics, Vol.38 (No.1). pp. 14-29. doi:10.1016/j.compgeo.2010.09.001
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Official URL: http://dx.doi.org/10.1016/j.compgeo.2010.09.001
Abstract
This paper presents a numerical investigation of shear behavior and strain localization in cemented sands using the distinct element method (DEM), employing two different failure criteria for grain bonding. The first criterion is characterized by a Mohr–Coulomb failure line with two distinctive contributions, cohesive and frictional, which sum to give the total bond resistance; the second features a constant, pressure-independent strength at low compressive forces and purely frictional resistance at high forces, which is the standard bond model implemented in the Particle Flow Code (PFC2D). Dilatancy, material friction angle and cohesion, strain and stress fields, the distribution of bond breakages, the void ratio and the averaged pure rotation rate (APR) were examined to elucidate the relations between micromechanical variables and macromechanical responses in DEM specimens subjected to biaxial compression tests.
A good agreement was found between the predictions of the numerical analyses and the available experimental results in terms of macromechanical responses. In addition, with the onset of shear banding, inhomogeneous fields of void ratio, bond breakage and APR emerged in the numerical specimens.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
| Divisions: | Faculty of Science > Engineering | ||||
| Library of Congress Subject Headings (LCSH): | Shear (Mechanics) -- Mathematical models, Shear strength of soils -- Mathematical models, Strains and stresses, Numerical analysis, Soil mechanics | ||||
| Journal or Publication Title: | Computers and Geotechnics | ||||
| Publisher: | Elsevier BV | ||||
| ISSN: | 0266-352X | ||||
| Official Date: | January 2011 | ||||
| Dates: |
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| Volume: | Vol.38 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 16 | ||||
| Page Range: | pp. 14-29 | ||||
| DOI: | 10.1016/j.compgeo.2010.09.001 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Guo jia zi ran ke xue ji jin wei yuan hui (China) [National Natural Science Foundation of China] (NSFC), China. Jiao yu bu [China. Ministry of Education], Royal Society (Great Britain), Itasca Consulting Group | ||||
| Grant number: | 10972158 (NSFC), 521025932 (NSFC), 2007-1108 (CMoE), 2008/R2 (RS) |
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