Numerical modelling of granular materials with spherical discrete particles and the bounded rolling friction model. Application to railway ballast

被引：76
作者：
Irazabal, Joaquin [1 ]
Salazar, Fernando [1 ]
Onate, Eugenio [1 ,2 ]
机构：
[1] Int Ctr Numer Methods Engn CIMNE, Barcelona, Spain
[2] Polytech Univ Catalonia UPC, Barcelona, Spain
来源：
COMPUTERS AND GEOTECHNICS | 2017年 / 85卷
关键词：
Discrete element method; Bounded rolling friction model; Rolling resistance torque; Railway ballast; Railway track stability; DISTINCT ELEMENT MODEL; CONTACT DETECTION; SHAPE CHARACTERIZATION; CONSTITUTIVE MODEL; DEM SIMULATION; RESISTANCE; FORMULATION; ALGORITHM; BEHAVIOR;
D O I：
10.1016/j.compgeo.2016.12.034
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
The Discrete Element Method (DEM) was found to be an effective numerical method for the calculation of engineering problems involving granular materials. However, the representation of irregular particles using the DEM is a very challenging issue, leading to different geometrical approaches. This document presents a new insight in the application of one of those simplifications known as rolling friction, which avoids excessive rotation when irregular shaped materials are simulated as spheric particles. This new approach, called the Bounded Rolling Friction model, was applied to reproduce a ballast resistance test. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：220 / 229
页数：10
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