Abstract
The goal is to determine the constitutive behavior of granular packings under various deformations (isotropic and anisotropic) from particle simulations. For this we consider deformations, stress, structure and the contact forces as the basis. In a previous study [6,7] we investigated using DEM, the evolution of the coordination number (and the packing structure) and pressure as functions of the volume fraction for a polydisperse granular packing of spheres under isotropic compression. Here we focus on anisotropic deformation by implementing the triaxial test setup in a similar way. We study the effect of polydispersity changing the width of the particle size distribution. We find that an increase in polydispersity leads to a decrease in pressure at constant volume fraction whereas the macroscopic friction angle seems to increase with polydispersity. Furthermore, we performed triaxial test simulations with soft friction which is characterized by a small tangential contact stiffness. Our main observation is that using the same initial packing configuration with different friction coefficients does not lead to an obvious trend in simulation results.
Original language | English |
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Title of host publication | World Congress on Particle Technology 6 |
Subtitle of host publication | Abstracts and proceedings |
Place of Publication | Nürnberg |
Publisher | Nürnberg Messe GmbH |
Pages | 1-4 |
Number of pages | 4 |
ISBN (Print) | 978-3-00-030570-2 |
Publication status | Published - 26 Apr 2010 |
Event | 6th World Congress on Particle Technology, WCPT 2010 - Nuremberg, Germany Duration: 26 Apr 2010 → 29 Apr 2010 Conference number: 6 |
Conference
Conference | 6th World Congress on Particle Technology, WCPT 2010 |
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Abbreviated title | WCPT 2010 |
Country/Territory | Germany |
City | Nuremberg |
Period | 26/04/10 → 29/04/10 |