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Effect of stress history on lateral earth pressure coefficient at rest: A discrete elements analysis.

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Title: Effect of stress history on lateral earth pressure coefficient at rest: A discrete elements analysis.
Authors: Khellaf, Abdelghani1,2 (AUTHOR) khellafabdelghani3@gmail.com, Mansouri, Mouloud1,3 (AUTHOR) mansouri.mouloud@univ-setif.dz
Source: Granular Matter. Apr2026, Vol. 28 Issue 2, p1-17. 17p.
Subjects: Earth pressure, Discrete element method, Oedometers (Soil mechanics), Tensor algebra, Micromechanics, Interfacial friction, Granular materials, Strains & stresses (Mechanics)
Abstract: The aim of this work is to contribute to a better understanding of the physical aspects involved in the coefficient of lateral earth pressure at rest (), focusing in particular on the effect of loading history on this coefficient. For this purpose, a 2D discrete element modeling of a cyclic oedometer test on a granular sample is carried out. It is shown that the evolution of with loading is in good agreement with that of empirical formulas derived from experience. Analysis of the variation of certain micromechanical parameters, namely the fabric tensor, the number of contacts and the forces acting in contact with the load, has shown that for a normally consolidated granular sample, horizontal contacts are dominant, this dominance decreases with increasing degree of overconsolidation. The variation in the dominant direction of contacts is due to the differential change in the number of contacts per direction as the load varies. The orientation of the contacts may give some indication of the tendency of , however, the value of is more influenced by the forces acting on these contacts. The evolution of according to a loop for a loading-unloading cycle in the oedometer test, is ultimately governed by intergranular friction. [ABSTRACT FROM AUTHOR]
Copyright of Granular Matter is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of stress history on lateral earth pressure coefficient at rest: A discrete elements analysis.
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  Data: <searchLink fieldCode="AR" term="%22Khellaf%2C+Abdelghani%22">Khellaf, Abdelghani</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> khellafabdelghani3@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Mansouri%2C+Mouloud%22">Mansouri, Mouloud</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> mansouri.mouloud@univ-setif.dz</i>
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  Data: <searchLink fieldCode="JN" term="%22Granular+Matter%22">Granular Matter</searchLink>. Apr2026, Vol. 28 Issue 2, p1-17. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Earth+pressure%22">Earth pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Discrete+element+method%22">Discrete element method</searchLink><br /><searchLink fieldCode="DE" term="%22Oedometers+%28Soil+mechanics%29%22">Oedometers (Soil mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Tensor+algebra%22">Tensor algebra</searchLink><br /><searchLink fieldCode="DE" term="%22Micromechanics%22">Micromechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Interfacial+friction%22">Interfacial friction</searchLink><br /><searchLink fieldCode="DE" term="%22Granular+materials%22">Granular materials</searchLink><br /><searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink>
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  Data: The aim of this work is to contribute to a better understanding of the physical aspects involved in the coefficient of lateral earth pressure at rest (), focusing in particular on the effect of loading history on this coefficient. For this purpose, a 2D discrete element modeling of a cyclic oedometer test on a granular sample is carried out. It is shown that the evolution of with loading is in good agreement with that of empirical formulas derived from experience. Analysis of the variation of certain micromechanical parameters, namely the fabric tensor, the number of contacts and the forces acting in contact with the load, has shown that for a normally consolidated granular sample, horizontal contacts are dominant, this dominance decreases with increasing degree of overconsolidation. The variation in the dominant direction of contacts is due to the differential change in the number of contacts per direction as the load varies. The orientation of the contacts may give some indication of the tendency of , however, the value of is more influenced by the forces acting on these contacts. The evolution of according to a loop for a loading-unloading cycle in the oedometer test, is ultimately governed by intergranular friction. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Granular Matter is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10035-026-01618-y
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        Text: English
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        Type: general
      – SubjectFull: Discrete element method
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      – SubjectFull: Oedometers (Soil mechanics)
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      – SubjectFull: Tensor algebra
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      – SubjectFull: Interfacial friction
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      – SubjectFull: Strains & stresses (Mechanics)
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      – TitleFull: Effect of stress history on lateral earth pressure coefficient at rest: A discrete elements analysis.
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              Text: Apr2026
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              Y: 2026
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