Engineering Mechanics

Proceedings Vol. 21 (2015)

ENGINEERING MECHANICS 2015

21st INTERNATIONAL CONFERENCE
May 11 – 14, 2015, Svratka, Czech Republic

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Editors: Jiří Náprstek and Cyril Fischer

ISBN 978-80-86246-42-0 (printed, Extended Abstracts)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

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Dependence of the Discrete Model on the Internal Parameters Considering Grain Crushing

R. Dubina, J. Eliáš
pages 54 - 55, full text

For a correct representation of the ballast material behaviour in discrete element method (DEM) it is necessary to take into account crushing of grains. The representation of crushing phenomenon is based on the replacement of the original grain by a clump of 4, 6 or 14 spheres. The replacement occurs when the equivalent stress exceeds the size dependent material strength. The crushing model depends on the material parameters such as sphere radius, reference material stregth, friction angle, etc. From the simulated experiments it is clear that the behaviour of the presented approach depends also on the non-material parameters. The inluence of these parameters, namely the loading frequency and the time period of crushing condition check, is studied in the paper.

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Engineering Mechanics

International Conference

Proceedings Vol. 21 (2015)

ENGINEERING MECHANICS 2015