Representation of crushing phenomenon in DEM model of railway ballast
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F14%3APU112810" target="_blank" >RIV/00216305:26110/14:PU112810 - isvavai.cz</a>
Výsledek na webu
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DOI - Digital Object Identifier
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Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Representation of crushing phenomenon in DEM model of railway ballast
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Representation of crushing phenomenon in DEM model of railway ballast
Popis výsledku anglicky
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.
Klasifikace
Druh
O - Ostatní výsledky
CEP obor
JN - Stavebnictví
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů