Discrete element cluster modeling of complex mesoscopic particles for use with the particle flow code method

2015 ◽  
Vol 17 (3) ◽  
pp. 377-387 ◽  
Author(s):  
Chong Shi ◽  
De-jie Li ◽  
Wei-ya Xu ◽  
Rubin Wang
Keyword(s):  
Discrete Element ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Cluster Modeling ◽  
Particle Flow Code Method

A Wear Simulation of the Fixed Soft Abrasive Film Based on Discrete Element Method

2014 ◽  
Vol 1017 ◽  
pp. 452-457
Author(s):  
Zhao Zhong Zhou ◽  
Kai Ping Feng ◽  
Ju Long Yuan
Keyword(s):  
Element Model ◽  
Discrete Element ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Discrete Element Model ◽  
Optic Fiber ◽  
Wear Property ◽  
Factors Affecting ◽  
Main Factors ◽  
Simulation Results

A new polishing method by using fixed soft abrasive film is proposed to polish the end-face of the optic fiber connector. In order to study the wear property of the fixed soft abrasive film, the Particle Flow Code program was employed to simulate the interaction of surface topography. The discrete element model of the optic fiber connector and the fixed soft abrasive film were established. Through the interaction of the surface of two models, the process of contact and friction between the fixed soft abrasive film and the end-face of the optic fiber connector could be simulated. Simulation results showed that the main factors affecting the wear of the fixed soft abrasive film were pressure and speed, which mainly affected the normal stress and the tangential stress respectively. And the wear of the surface was mainly related to pressure and speed. The greater the speed and pressure were, the more serious wear of the fixed soft abrasive film was.

scholarly journals Performance based simulation of pervious concrete using discrete element method

2020 ◽  
Vol 72 (08) ◽  
pp. 693-701
Keyword(s):  
Discrete Element Method ◽  
Discrete Element ◽  
Pervious Concrete ◽  
Particle Flow ◽  
Particle Flow Code ◽  
The Finite Element Method ◽  
Ordinary Concrete ◽  
Paste Content ◽  
Highly Porous ◽  
Element Method

Pervious concrete is a special type of concrete that differs from ordinary concrete by its highly porous nature, which is why this type of discrete material can not be modelled using the Finite Element Method (FEM). Behaviour of pervious concrete samples with different aggregate sizes and void ratios is simulated in the paper, using the Particle Flow Code (PFC) software, which is based on the discrete element method (DEM). The PFC software is used to simulate various experimental results obtained on high paste content pervious concrete samples.

scholarly journals Certain Discrete Element Methods in Problems of Fracture Mechanics

10.14311/374 ◽  
2002 ◽  
Vol 42 (4) ◽  
Author(s):  
P. P. Procházka ◽  
M. G. Kugblenu
Keyword(s):  
Material Properties ◽  
Granular Media ◽  
Dynamic Equilibrium ◽  
Discrete Element ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Classical Particle ◽  
Numerical Experience ◽  
Discrete Element Methods ◽  
Element Method

In this paper two discrete element methods (DEM) are discussed. The free hexagon element method is considered a powerful discrete element method, which is broadly used in mechanics of granular media. It substitutes the methods for solving continuum problems. The great disadvantage of classical DEM, such as the particle flow code (material properties are characterized by spring stiffness), is that they have to be fed with material properties provided from laboratory tests (Young's modulus, Poisson's ratio, etc.). The problem consists in the fact that the material properties of continuum methods (FEM, BEM) are not mutually consistent with DEM. This is why we utilize the principal idea of DEM, but cover the continuum by hexagonal elastic, or elastic-plastic, elements. In order to complete the study, another one DEM is discussed. The second method starts with the classical particle flow code (PFC - which uses dynamic equilibrium), but applies static equilibrium. The second method is called the static particle flow code (SPFC). The numerical experience and comparison numerical with experimental results from scaled models are discussed in forthcoming paper by both authors.

scholarly journals Application of Discrete Element Methods to the Problem of Rock Bumps

10.14311/378 ◽  
2002 ◽  
Vol 42 (4) ◽  
Author(s):  
P. P. Procházka ◽  
M. G. Kugblenu
Keyword(s):  
Discrete Element Method ◽  
Granular Media ◽  
Dynamic Equilibrium ◽  
Discrete Element ◽  
Particle Flow ◽  
Particle Flow Code ◽  
Classical Particle ◽  
Discrete Element Methods ◽  
Scaled Models ◽  
Element Method

This paper is a continuation of a previous paper by the authors. Applications of two discrete element methods (DEM) to several fields of geotechnics are discussed. The free hexagon element method is considered a powerful discrete element method, and is widely used in mechanics of granular media. It substitutes the methods for solving continuum problems. In order to complete the study, other discrete element methods are discussed. The second method starts with the classical particle flow code (PFC, which uses dynamic equilibrium), but we apply static equilibrium in our case. The second method is called the static particle flow code (SPFC). The numerical experiences and comparison with experimental results from scaled models are discussed.

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