Title : ( Instability of saturated granular materials in biaxial loading with polygonal particles using discrete element Method (DEM) )
Authors: masoud khabazian , Ehsan Seyedi Hosseininia ,Abstract
Sandy soils may become unstable under loading which causes large deformations and consequently, impose damages to existing structures. In this research, Discrete Element Method (DEM) is used to simulate 2D drained and undrained behavior of polygonal granular materials to investigate instability occurrence. The so-called cylinder method is applied to simulate the undrained behavior that a pipe is assumed between neighboring pores to allow fluid flow. The applicability of this method was evaluated with constant-volume approach. The advantage of the cylinder method is to assess the distribution of fluid pressure. Comparison of the results indicate good match. Based on both drained and undrained simulations, a unique critical state line was obtained; however, the position of instability line was influenced by the initial void ratio. At the onset of potential instability, the central pore pressure increases highly; however, it reduces afterwards and the fluid pressure is almost distributed uniformly throughout the sample.
Keywords
Polygonal particles; Cylinder method; Discrete element method; Instability line; Drained and undrained conditions@article{paperid:1078430,
author = {Khabazian, Masoud and Seyedi Hosseininia, Ehsan},
title = {Instability of saturated granular materials in biaxial loading with polygonal particles using discrete element Method (DEM)},
journal = {Powder Technology},
year = {2020},
volume = {363},
number = {1},
month = {March},
issn = {0032-5910},
pages = {428--441},
numpages = {13},
keywords = {Polygonal particles; Cylinder method; Discrete element method; Instability line; Drained and undrained conditions},
}
%0 Journal Article
%T Instability of saturated granular materials in biaxial loading with polygonal particles using discrete element Method (DEM)
%A Khabazian, Masoud
%A Seyedi Hosseininia, Ehsan
%J Powder Technology
%@ 0032-5910
%D 2020