About: Representation of crushing phenomenon in DEM model of railway ballast

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Representation of ballast behaviour in Discrete Element Models (DEM) would not be complete without including crushing of grains. Two approaches have been developed in literature. The first one represents every grain as an assembly of smaller units with cohesive contacts between them. This approach is relatively precise and universal, but it demands extreme computational resources. The other approach is exploited here. Every grain is modelled as one rigid body. The crushing occurs when some equivalent stress in the grain, here determined as von Mises stress computed from fabric stress tensor, exceeds the material strength. The grain is then replaced by several smaller bodies, pieces. These pieces must often have the same shape as the original grain (typically spherical) and their assembly therefore cannot be created in exactly the shape of the original grain. The effects of number of pieces and their properties are studied. Representation of ballast behaviour in Discrete Element Models (DEM) would not be complete without including crushing of grains. Two approaches have been developed in literature. The first one represents every grain as an assembly of smaller units with cohesive contacts between them. This approach is relatively precise and universal, but it demands extreme computational resources. The other approach is exploited here. Every grain is modelled as one rigid body. The crushing occurs when some equivalent stress in the grain, here determined as von Mises stress computed from fabric stress tensor, exceeds the material strength. The grain is then replaced by several smaller bodies, pieces. These pieces must often have the same shape as the original grain (typically spherical) and their assembly therefore cannot be created in exactly the shape of the original grain. The effects of number of pieces and their properties are studied. (en)
Title	Representation of crushing phenomenon in DEM model of railway ballast Representation of crushing phenomenon in DEM model of railway ballast (en)
skos:prefLabel	Representation of crushing phenomenon in DEM model of railway ballast Representation of crushing phenomenon in DEM model of railway ballast (en)
skos:notation	RIV/00216305:26110/14:PU112810!RIV15-MSM-26110___
http://linked.open...avai/riv/aktivita	S
http://linked.open...avai/riv/aktivity	S
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Dubina, Radek Eliáš, Jan
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Fakulta stavební
http://linked.open...dnocenehoVysledku	42233
http://linked.open...ai/riv/idVysledku	RIV/00216305:26110/14:PU112810
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Discrete element method (DEM), railway ballast, crushing, abrasion, oedometric test (en)
http://linked.open.../riv/klicoveSlovo	railway ballast crushing abrasion oedometric test Discrete element method (DEM)
http://linked.open...ontrolniKodProRIV	[C3F84F036ADD]
http://linked.open...in/vavai/riv/obor	JN
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Eliáš, Jan Dubina, Radek
http://localhost/t...ganizacniJednotka	26110

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