ISSN 2319-5347, ISI Impact Factor: 0.763

VOLUME 03 NO. 04 OCTOBER 2014: 

Title:        Effect of sample size on the macro and micro-scale behavior of granular materials using 3D DEM
Authors:    Md. Mahmud Sazzad, Md. Gauhor Mahmood, Bidduth Kumar Mondol
Abstract:   This paper presents the effect of sample size on the macro- and micro-scale behaviors of granular materials such as sand using the three-dimensional (3d) discrete element method (dem). Three numerical samples of different sizes were prepared using spheres as particles. During the random sample generation, spheres of different radii were placed randomly in a cube without any contact. After the random generation of three successful samples, they were subjected to isotropic compression by moving their boundaries inward. Simulations of true triaxial compression tests were carried out using these samples to investigate their behaviors both at macro- and micro-scale. The numerical results indicate that the tress-strain-dilative behavior agrees well with the laboratory based experimental results qualitatively for different sample sizes. Small size sample attains the highest strength and it decreases as the sample size increases. It is noted that the evolution of coordination number is the highest for small size sample and it decreases as the sample size increases.

Keywords:   Sample Size, Micro-Scale, Granular Materials, Simulations
Page no:      354-357

Download Full Paper