Detail publikace

Representation of crushing phenomenon in DEM model of railway ballast

DUBINA, R. ELIÁŠ, J.

Originální název

Representation of crushing phenomenon in DEM model of railway ballast

Typ

abstrakt

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Discrete element method (DEM), railway ballast, crushing, abrasion, oedometric test

Autoři

DUBINA, R.; ELIÁŠ, J.

Vydáno

3. 11. 2014

ISBN

978-80-261-0429-2

Kniha

30th conference with international participation Computational Mechanics 2014

Strany od

19

Strany do

20

Strany počet

2

BibTex

@misc{BUT112613,
  author="Radek {Dubina} and Jan {Eliáš}",
  title="Representation of crushing phenomenon in DEM model of railway ballast",
  booktitle="30th conference with international participation Computational Mechanics 2014",
  year="2014",
  pages="19--20",
  isbn="978-80-261-0429-2",
  note="abstract"
}