Print Email Facebook Twitter Calibration for discrete element modelling of railway ballast Title Calibration for discrete element modelling of railway ballast: A review Author Guo, Y. (TU Delft Railway Engineering) Zhao, Chunfa (Southwest Jiaotong University) Markine, V.L. (TU Delft Railway Engineering) Jing, Guoqing (Beijing Jiaotong University) Zhai, Wanming (Southwest Jiaotong University) Date 2020 Abstract The discrete element method (DEM) has been confirmed as an effective numerical method for modelling railway ballast, and successfully used to analyse a wide range of ballast-related applications (e.g. geomaterials). However, there still exists some aspects under development. Among them, the model calibration can be the most significant one (morphology, degradation and contact model). Because reliable and accurate results can be obtained only when the parameters are carefully selected. Therefore, diverse DEM applications and developments in railway ballast are critically reviewed. Furthermore, the model calibration methods are discussed. This is able to help future researchers improve the existing calibration methods, further, build more accurate, standardised and validated DEM models for ballast-related studies. Additionally, this paper can assist researchers to choose an appropriate model for specific applications. Subject BallastCalibrationContact modelDegradationDiscrete element methodMorphologyParticle shape To reference this document use: http://resolver.tudelft.nl/uuid:13ab30eb-e918-47d2-8107-bc3d2fc9a626 DOI https://doi.org/10.1016/j.trgeo.2020.100341 Embargo date 2022-02-28 ISSN 2214-3912 Source Transportation Geotechnics, 23 Bibliographical note Accepted author manuscript Part of collection Institutional Repository Document type review Rights © 2020 Y. Guo, Chunfa Zhao, V.L. Markine, Guoqing Jing, Wanming Zhai Files PDF revised.pdf 2.04 MB Close viewer /islandora/object/uuid:13ab30eb-e918-47d2-8107-bc3d2fc9a626/datastream/OBJ/view