Numerical study of one-dimensional compression in granular materials

J. C. Lopera Perez; C. Y. Kwok; C. O'Sullivan; X. Huang; K. J. Hanley

doi:10.1680/jgele.14.00107

Numerical study of one-dimensional compression in granular materials

J. C. Lopera Perez
, C. Y. Kwok
, C. O'Sullivan
, X. Huang
, K. J. Hanley

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

20 Citations (Scopus)

Abstract

The discrete element method has been employed to simulate vertical one-dimensional compression of an idealised soil. Direct measurement of the full stress tensor was possible and the results show that K0 (the ratio of horizontal to vertical effective stresses) increases with void ratio, which is consistent with previous experimental studies. The anisotropic fabric induced during compression was quantified by considering the orientations and magnitudes of the normal contact forces. For the denser samples there was a definite bias towards more vertically oriented contacts, resulting in lower stresses being transmitted in the horizontal direction for a given vertical stress. In contrast, the contacts were oriented more isotropically in the looser samples, allowing more similar stresses to be transmitted in the horizontal and vertical directions. © 2015 ICE Publishing: all rights reserved.

Original language	English
Pages (from-to)	96-103
Journal	Geotechnique Letters
Volume	5
Issue number	3
DOIs	https://doi.org/10.1680/jgele.14.00107
Publication status	Published - 1 Sept 2015
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This research was supported and financed by The University of Hong Kong Seed Funding Programme for Basic Research. Mr Lopera Perez would like to thank the IT Department at The University of Hong Kong for providing access to the high-performance computer HPCPOWER2 in order to conduct the simulations presented in this work.

Research Keywords

discrete-element modelling
fabric/structure of soils
particle-scale behaviour

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abstract = "The discrete element method has been employed to simulate vertical one-dimensional compression of an idealised soil. Direct measurement of the full stress tensor was possible and the results show that K0 (the ratio of horizontal to vertical effective stresses) increases with void ratio, which is consistent with previous experimental studies. The anisotropic fabric induced during compression was quantified by considering the orientations and magnitudes of the normal contact forces. For the denser samples there was a definite bias towards more vertically oriented contacts, resulting in lower stresses being transmitted in the horizontal direction for a given vertical stress. In contrast, the contacts were oriented more isotropically in the looser samples, allowing more similar stresses to be transmitted in the horizontal and vertical directions. {\textcopyright} 2015 ICE Publishing: all rights reserved.",

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AU - Kwok, C. Y.

AU - O'Sullivan, C.

AU - Huang, X.

AU - Hanley, K. J.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - The discrete element method has been employed to simulate vertical one-dimensional compression of an idealised soil. Direct measurement of the full stress tensor was possible and the results show that K0 (the ratio of horizontal to vertical effective stresses) increases with void ratio, which is consistent with previous experimental studies. The anisotropic fabric induced during compression was quantified by considering the orientations and magnitudes of the normal contact forces. For the denser samples there was a definite bias towards more vertically oriented contacts, resulting in lower stresses being transmitted in the horizontal direction for a given vertical stress. In contrast, the contacts were oriented more isotropically in the looser samples, allowing more similar stresses to be transmitted in the horizontal and vertical directions. © 2015 ICE Publishing: all rights reserved.

AB - The discrete element method has been employed to simulate vertical one-dimensional compression of an idealised soil. Direct measurement of the full stress tensor was possible and the results show that K0 (the ratio of horizontal to vertical effective stresses) increases with void ratio, which is consistent with previous experimental studies. The anisotropic fabric induced during compression was quantified by considering the orientations and magnitudes of the normal contact forces. For the denser samples there was a definite bias towards more vertically oriented contacts, resulting in lower stresses being transmitted in the horizontal direction for a given vertical stress. In contrast, the contacts were oriented more isotropically in the looser samples, allowing more similar stresses to be transmitted in the horizontal and vertical directions. © 2015 ICE Publishing: all rights reserved.

KW - discrete-element modelling

KW - fabric/structure of soils

KW - particle-scale behaviour

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DO - 10.1680/jgele.14.00107

M3 - RGC 21 - Publication in refereed journal

SN - 2045-2543

VL - 5

SP - 96

EP - 103

JO - Geotechnique Letters

JF - Geotechnique Letters

IS - 3

ER -

Numerical study of one-dimensional compression in granular materials

Abstract

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Research Keywords

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