Calibration for discrete element modelling of railway ballast: A review
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 …
for modelling railway ballast, and successfully used to analyse a wide range of ballast …
[HTML][HTML] Railway ballast performance: recent advances in the understanding of geometry, distribution and degradation
Railway ballast performance is dictated by a complex mix of mechanical properties. These
effect its performance at the particle level for example in terms of particle degradation, but …
effect its performance at the particle level for example in terms of particle degradation, but …
DEM study on the dynamic responses of a ballasted track under moving loading
This paper presents the discrete element modeling of the dynamic response of a ballasted
track under moving loads. The DEM model, consisting of sleepers, ballast, and sub-ballast …
track under moving loads. The DEM model, consisting of sleepers, ballast, and sub-ballast …
Discrete element model for general polyhedra
AG Neto, P Wriggers - Computational Particle Mechanics, 2022 - Springer
We present a version of the Discrete Element Method considering the particles as rigid
polyhedra. The Principle of Virtual Work is employed as basis for a multibody dynamics …
polyhedra. The Principle of Virtual Work is employed as basis for a multibody dynamics …
[HTML][HTML] Experimental investigation of mixing railway ballast grains with different form using large-scale direct shear box apparatus
This paper investigates the effect of grain form on the mechanical behaviour of a railway
ballast aggregate using large-scale shear box tests. The speciality of the research is that …
ballast aggregate using large-scale shear box tests. The speciality of the research is that …
Discrete element modelling of the effects of particle angularity on the deformation and degradation behaviour of railway ballast
Railroad ballast exhibits distinct morphological characteristics represented by shape
irregularity, corner angularity, and surface texture. Upon repeated train loading, the …
irregularity, corner angularity, and surface texture. Upon repeated train loading, the …
A discrete element study on the deformation and degradation of coal-fouled ballast
This paper presents the results of Discrete Element Modelling (DEM) which quantitively
examine the effect of coal fouling on the deformation and degradation of ballast upon cyclic …
examine the effect of coal fouling on the deformation and degradation of ballast upon cyclic …
Stress-dilatancy behaviour of fouled ballast: Experiments and DEM modelling
This paper presents a study of the mechanical behaviour of ballast contaminated by different
fouling agents such as coal and subgrade clay. Large-scale direct shear tests were carried …
fouling agents such as coal and subgrade clay. Large-scale direct shear tests were carried …
Effects of Particle Size and Grading on the Breakage of Railway Ballast: Laboratory Testing and Numerical Modeling
J Chen, Y Liu, Q Hu, R Gao - Sustainability, 2023 - mdpi.com
Ballast is coarse aggregate with particle size normally ranging from 10 mm to 65 mm. Upon
repeated train loading, ballast deteriorates in the form of either continuous abrasion of sharp …
repeated train loading, ballast deteriorates in the form of either continuous abrasion of sharp …
[HTML][HTML] Surface orientation tensor to predict preferred contact orientation and characterise the form of individual particles
The characterisation and classification of particle form are typically based on the
consideration of the main particle dimensions, for the derivation of which no method has …
consideration of the main particle dimensions, for the derivation of which no method has …