Structured deformation of granular material in the state of active earth pressure

Leśniewska Danuta; A. Tordesillas; Magdale Pietrzak; Shuo Zhou; Michał Nitka

doi:10.1016/j.compgeo.2023.105316

Structured deformation of granular material in the state of active earth pressure

Abstract

The paper focuses on the ability of granular materials to undergo structured deformation by analysing the data from the retaining wall model tests and discrete element simulations. The structured deformation means the movement of a granular material which produces a stable, regular pattern of multiple shear bands. The paper's primary purpose is to study this kind of deformation for the selected data representing the state of active earth pressure of granular materials. The locations of high and negligible shear strains (shear zones and 'dead' zones) in the displacement fields are determined using the shear strains definition. A recently introduced metric called s-LID, expressing the perspective of collective grain motion, is applied to the same data. The s-LID analysis finds the detailed structure of the localisation pattern directly from displacement data without using the continuum mechanics concept of strains. It is entirely consistent with the digital image correlation analysis in the areas of significant displacement. It expands the knowledge of the deformation structure in small displacement areas, where the digital image correlation method loses its capability. Low s-LID and point-like representations in the displacement state space identify nearly rigid zones in the area of high displacements.

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Authors (5)

Leśniewska Danuta prof. dr hab. inż.
A. Tordesillas
Magdale Pietrzak dr
Shuo Zhou
Michał Nitka dr hab. inż.

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Keywords

STRUCTURED DEFORMATION RETAINING WALL PHYSICAL STATE SPACE DISPLACEMENT STATE SPACE LOCAL INTRINSIC DIMENSIONALITY DIGITAL IMAGE CORRELATION

Details

Category:

Articles

Type:

artykuły w czasopismach

Published in:

COMPUTERS AND GEOTECHNICS no. 157,
ISSN: 0266-352X

Language:

English

Publication year:

2023

Bibliographic description:

Danuta L., Tordesillas A., Pietrzak M., Zhou S., Nitka M.: Structured deformation of granular material in the state of active earth pressure// COMPUTERS AND GEOTECHNICS -,iss. 157 (2023), s.105316-

DOI: