Location
Chicago, Illinois
Date
03 May 2013, 2:50 pm - 3:05 pm
Abstract
This paper summarises the potential of the Discrete Element Method (DEM) to simulate the behaviour of granular materials under cyclic loading conditions. DEM simulations were carried out on two different assemblies of granular particles (e.g. sand and ballast). It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. liquefaction, post liquefaction and cyclic densification of ballast) similar to the laboratory experiments. Moreover, an instrumented track at Bulli, NSW, Australia, was modeled using DEM to examine the lateral movement of granular materials, including the particle breakage during cyclic loading. The results of these simulations captured the lateral response of ballast in accordance with the field observations and the evolution of micro-mechanical parameters such as a distribution of the contact force and bond force developed during cyclic loading is presented to explain the mechanism of particle breakage.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
7th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2013 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Vinod, J. S.; Indraratna, Buddhima; and Sitharam, T. G., "Dem Modelling of Granular Materials During Cyclic Loading" (2013). International Conference on Case Histories in Geotechnical Engineering. 2.
https://scholarsmine.mst.edu/icchge/7icchge/session17/2
Dem Modelling of Granular Materials During Cyclic Loading
Chicago, Illinois
This paper summarises the potential of the Discrete Element Method (DEM) to simulate the behaviour of granular materials under cyclic loading conditions. DEM simulations were carried out on two different assemblies of granular particles (e.g. sand and ballast). It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. liquefaction, post liquefaction and cyclic densification of ballast) similar to the laboratory experiments. Moreover, an instrumented track at Bulli, NSW, Australia, was modeled using DEM to examine the lateral movement of granular materials, including the particle breakage during cyclic loading. The results of these simulations captured the lateral response of ballast in accordance with the field observations and the evolution of micro-mechanical parameters such as a distribution of the contact force and bond force developed during cyclic loading is presented to explain the mechanism of particle breakage.
