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RISA Study on the Effect of Particle Shape and Fragmentation on the Mechanical Behavior of Granular Materials Using Discrete Element Method
Particle crushing can result in changes in the mechanical properties of granular materials. By using Discrete Element Method (DEM), a model is established to simulate the breakage of two-dimensional particles for three different shapes (triangle...
On the Instability of a Cylindrical Soil Specimen
Antisymmetric bifurcation in soil deformation behavior is analyzed, while the constitutive behavior is
described by the tangential-subloading surface model. The bifurcations, including shear band and diffuse ...
On the Stress-Force-Fabric relationship in anisotropic granular materials
In review of micromechanical laws for granular materials, there is a relationship that describes the stress state, fabric, and contact forces among particles, which is called “Stress-Force-Fabric” (SFF) relationship. SFF relationship can properly...
An Experimental Investigation on the Generation of a Stable Arch in Granular Materials Using a Developed Trapdoor Apparatus
This paper discusses the formation of stable arches in granular materials by using a series of
laboratory tests. To this aim, a developed trapdoor apparatus is designed to find dimensions of arches
formed over the door in cohesionless...
Physicochemical processes of frictional healing: Effects of water on stick slip stress drop and friction of granular fault gouge
An experimental investigation on stable arch formation in cohesionless granular materials using developed trapdoor test
Arching in granular materials is a general phenomenon that exists in different domains of engineering such as design of silos and hoppers aswell as geotechnical engineering problems. Due to the interaction among particles that are flowing through...
An experimental investigating the width and height of a stable arch formed in granular materials by using a new developed trapdoor apparatus
This paper discusses the formation of arching phenomenon as a stable arch in granular materials. A series of laboratory tests are performed to investigate the formation in granular materials. For this aim, a new trapdoor apparatus is designed...
ّFluidization in a vibrated column of spherical particles
A pile of granular materials subjected to a vertically induced external vibration shows different complex behavior such as surface structure formation, spontaneous heap formation or convection. A common feature of all these behaviors...
Microdynamic analysis of oscillating transportation of particles
Transportation of granular material using an oscillating plate is studied based on the results generated by Discrete Element Method (DEM). The objective is to present a numerical simulation method to model the motion of granular material consisting...
Discrete element modeling of inherently anisotropic granular assemblies with polygonal particles
In the present article, we study the effect of inherent anisotropy, i.e., initial bedding angle of particles and associated voids on macroscopic mechanical behavior of granular materials, by numerical simulation of
several biaxial compression...