Strength and deformation characteristics of a locked sand at low effective stresses


Bhandari, A.R. and Powrie, W. (2013) Strength and deformation characteristics of a locked sand at low effective stresses Granular Matter, 15, (5), pp. 543-556. (doi:10.1007/s10035-013-0426-8).

Download

[img] PDF __soton.ac.uk_ude_PersonalFiles_Users_ss1q07_mydocuments_Strength and deformation characteristics of a locked sand at low effective stresses (2).pdf - Other
Restricted to Repository staff only

Download (3MB)

Description/Abstract

This paper describes the results of triaxial compression tests carried out at effective cell pressures ranging from 12.5 to 100 kPa to investigate the influence of fabric structure on the yield and failure of intact Reigate silver sand. In some of the tests, a digital image-based technique was used to determine the instant of onset of strain localisation, and the distribution of strain localisations within the specimen as overall deformation progressed. Comparative tests on intact and reconstituted specimens showed that fabric structure in the intact material allows the mobilisation of stress ratios close to peak before the onset of dilation, and increases the shear modulus at a given effective cell pressure and strain. Localisation was found to start at or after the onset of dilation, with a tendency to delay at increasing effective cell pressure. More localised deformation was observed at low effective cell pressures. Consistency between the critical state strengths of intact and reconstituted specimens is demonstrated, provided that the effect of shear band geometry is taken into account in stress analysis.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1007/s10035-013-0426-8
ISSNs: 1434-5021 (print)
Keywords: deformation, laboratory tests, fabric structure, natural sands, shear strength, small strains, stiffness, strain localisation, stress-dilatancy
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Organisations: Infrastructure Group
ePrint ID: 358919
Date :
Date Event
October 2013Published
Date Deposited: 15 Oct 2013 10:36
Last Modified: 17 Apr 2017 14:46
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/358919

Actions (login required)

View Item View Item