Advancements in geo-inclusions for ballasted track: Constitutive modelling and numerical analysis

Qi, Y; Indraratna, B; Ngo, T; Ferreira, FB

Advancements in geo-inclusions for ballasted track: Constitutive modelling and numerical analysis

Qi, Y

Indraratna, B

Ngo, T Ferreira, FB

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Sustainability (Switzerland), 2021, 13, (16)
Issue Date:: 2021-08-02

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Field	Value	Language
dc.contributor.author	Qi, Y https://orcid.org/0000-0002-3486-2130
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Ngo, T
dc.contributor.author	Ferreira, FB
dc.date.accessioned	2022-02-15T23:37:54Z
dc.date.available	2022-02-15T23:37:54Z
dc.date.issued	2021-08-02
dc.identifier.citation	Sustainability (Switzerland), 2021, 13, (16)
dc.identifier.issn	2071-1050
dc.identifier.issn	2071-1050
dc.identifier.uri	http://hdl.handle.net/10453/154552
dc.description.abstract	This paper reviewed some salient features evolving through mathematical and numerical modelling of ballasted track components incorporating recycled rubber products. Firstly, a constitutive model based on the bounding surface concept was introduced to simulate the shear stress-strain response of waste mixtures (i.e., recycled rubber crumbs, coal wash, and steel furnace slag) used for the capping layer placed below the ballast medium, whereby the energy absorbing property resulting from the inclusion of different amounts of rubber has been captured. Subsequently, key research findings concerning the inclusion of recycled rubber mats on ballasted tracks for re-duced particle degradation under cyclic loading were examined and discussed. Discrete element modelling (DEM) coupled with Finite element modelling (FEM) to micro-mechanically characterise ballast behaviour with and without rubber mats offers invaluable insight into real-life track opera-tions. In particular, this coupled DEM-FEM model facilitates the exploration of micromechanical aspects of particle breakage, contact force distributions within the granular assembly, and the ori-entation of contacts during cyclic loading.
dc.language	English
dc.publisher	MDPI
dc.relation	http://purl.org/au-research/grants/arc/DP180101916
dc.relation	http://purl.org/au-research/grants/arc/IC170100006
dc.relation	http://purl.org/au-research/grants/arc/LP200200915
dc.relation.ispartof	Sustainability (Switzerland)
dc.relation.isbasedon	10.3390/su13169048
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	12 Built Environment and Design
dc.title	Advancements in geo-inclusions for ballasted track: Constitutive modelling and numerical analysis
dc.type	Journal Article
utslib.citation.volume	13
utslib.for	12 Built Environment and Design
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2022-02-15T23:37:46Z
pubs.issue	16
pubs.publication-status	Published
pubs.volume	13
utslib.citation.issue	16

Abstract:

This paper reviewed some salient features evolving through mathematical and numerical modelling of ballasted track components incorporating recycled rubber products. Firstly, a constitutive model based on the bounding surface concept was introduced to simulate the shear stress-strain response of waste mixtures (i.e., recycled rubber crumbs, coal wash, and steel furnace slag) used for the capping layer placed below the ballast medium, whereby the energy absorbing property resulting from the inclusion of different amounts of rubber has been captured. Subsequently, key research findings concerning the inclusion of recycled rubber mats on ballasted tracks for re-duced particle degradation under cyclic loading were examined and discussed. Discrete element modelling (DEM) coupled with Finite element modelling (FEM) to micro-mechanically characterise ballast behaviour with and without rubber mats offers invaluable insight into real-life track opera-tions. In particular, this coupled DEM-FEM model facilitates the exploration of micromechanical aspects of particle breakage, contact force distributions within the granular assembly, and the ori-entation of contacts during cyclic loading.

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http://hdl.handle.net/10453/154552