3D DEM Simulations of Drained Triaxial Compression of Sand Strengthened Using Microbially Induced Carbonate Precipitation

AbstractA discrete-element method (DEM)–based numerical model was developed to simulate the triaxial compression response of sand strengthened using microbially induced carbonate precipitation (MICP). A three-dimensional (3D) sphere packing algorithm that uses a particle-growth model was used to gen...

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Bibliographic Details
Published in:International journal of geomechanics 2017-06, Vol.17 (6)
Main Authors: Yang, Pu, O’Donnell, Sean, Hamdan, Nasser, Kavazanjian, Edward, Neithalath, Narayanan
Format: Article
Language:English
Subjects:
Carbonates
Computer simulation
Homogenizing
Mathematical models
Parameter identification
Parameters
Sand
Technical Papers
Three dimensional models
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Summary:AbstractA discrete-element method (DEM)–based numerical model was developed to simulate the triaxial compression response of sand strengthened using microbially induced carbonate precipitation (MICP). A three-dimensional (3D) sphere packing algorithm that uses a particle-growth model was used to generate the initial assemblage of particles. A parameter identification approach was used to evaluate the five microscale parameters of the DEM model (two elastic and three rupture parameters) using experimental results from drained triaxial compression tests on sand. The interparticle friction angle was found to be the most influential of the five parameters with respect to modeling the constitutive response. A particle homogenization approach was used to model the particles when they are strengthened with low amounts of calcium carbonate (
ISSN:1532-3641
1943-5622
DOI:10.1061/(ASCE)GM.1943-5622.0000848