Investigation of direct shear interface test using micro-polar continuum approach

B. Ebrahimian*, E. Bauer

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper investigates the influence of the length scale of a cohesionless granular soil specimen on the evolution of shear resistance in the direct shear interface test. Numerical simulations are carried out for two different specimen sizes using a micro-polar hypoplastic material model and the finite element method in the updated Lagrange frame. Due to the presence of the lateral rigid boundaries of shear box, the deformation and stress fields become significantly inhomogeneous. Correspondingly, the mobilized shear resistance and the shear band thickness are not constant along the interface. It is shown that, for the case of medium rough wall, some shear localization occurs along part of the interface between the sand specimen and the rough bottom surface and some shear localization takes place within the sand specimen. The evolution of the average mobilized friction angle obtained from the interface shear test is also influenced by the scaling effect of the testing device particularly at the beginning of shearing.

Original languageEnglish
Title of host publicationSpringer Series in Geomechanics and Geoengineering
PublisherSpringer Verlag
Pages143-148
Number of pages6
Volumenone
ISBN (Print)9783319135052
DOIs
Publication statusPublished - 2015
Event10th International Workshop on Bifurcation and Degradation in Geomaterials, IWBDG 2014 - Hong Kong, Hong Kong
Duration: 28 May 201430 May 2014

Publication series

NameSpringer Series in Geomechanics and Geoengineering
Volumenone
ISSN (Print)18668755
ISSN (Electronic)18668763

Conference

Conference10th International Workshop on Bifurcation and Degradation in Geomaterials, IWBDG 2014
CountryHong Kong
CityHong Kong
Period28/05/1430/05/14

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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