Cavity expansion analyses of crushable granular materials with state‐dependent dilatancy

Jiang, Mingjing; Sun, Yanan

doi:10.1002/nag.1027

Cited by 44 publications

(11 citation statements)

References 68 publications

(249 reference statements)

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“…It is well known that cavity expansion results, especially correlations between ' c , D r and p' 0 , are sensitive to the constitutive model and input parameters used (e.g. Yu and Houlsby,1991;Russell and Khalili, 2002;Russell, 2004;Jiang and Sun, 2011).…”

Section: Results For Drained Cavity Expansions In Sydney Sand Of Finimentioning

confidence: 99%

The cone penetration test in unsaturated sands

Pournaghiazar¹,

Russell²,

Khalili³

2013

Géotechnique

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The cone penetration test (CPT) is widely used for in situ characterization of saturated or dry soils based on correlations developed for saturated/dry conditions. However, no methods currently exist for interpretation of CPT data in unsaturated soils. This study advances both experimental and theoretical bases for interpretation of CPT data in unsaturated soils. In particular, a calibration chamber has been designed and constructed to perform laboratory controlled cone penetration tests in unsaturated soils. The chamber allows the independent application of lateral and vertical pressures to an unsaturated soil specimen while suction is controlled using the axis translation technique. A unique feature of the chamber includes the specimen formation system, enabling dry pluviation, static or dynamic compaction to be used. The results of cone penetration tests conducted on saturated and unsaturated sand specimens are presented and the significant contribution of suction to cone penetration resistance is highlighted. In addition, a novel solution procedure for the problem of cavity expansion in finite soil media has been developed which enables evaluation of chamber boundary effects and the extension of CPT results from chambers to free field conditions. It is possible to use hardening/softening elastic-plastic constitutive models formulated in the critical state framework in the analysis for the first time. A simple method is then presented which enables either: i) the contribution of suction to the effective stress (s) in an unsaturated sand to be estimated when results of CPTs are available for both saturated and unsaturated ground conditions; ii) an equivalent saturated cone penetration resistance to be determined from a value measured for unsaturated conditions, provided that s is known for the unsaturated conditions, permitting the use of established charts to estimate strength and stiffness parameters. Established CPT correlations for sands are extended to account for influences of suction. The extended correlations enable direct characterization of an unsaturated sand from CPT results provided the contribution of suction to effective stress (s) is known. It is shown that failing to account for s in the mean (or vertical) effective stress when interpreting CPT results may result in significant and non-conservative misrepresentations in estimated sand parameters. Declaration relating to disposition of project thesis/dissertation I hereby grant to the University of New South Wales or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University libraries in all forms of media, now or here after known, subject to the provisions of the Copyright Act 1968. I retain all property rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation. I also authorise University Microfilms to use the 350 word abstract of my thesis in Dissertation Abstracts International (this is applica...

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Section: Results For Drained Cavity Expansions In Sydney Sand Of Finimentioning

confidence: 99%

The cone penetration test in unsaturated sands

Pournaghiazar¹,

Russell²,

Khalili³

2013

Géotechnique

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“…It is well known that cavity expansion results, especially correlations between σ ′ c , D r , and p ′ 0 , are sensitive to the constitutive model and input parameters used (e.g. Yu and Houlsby , Russell and Khalili , Russell , Jiang and Sun ). Consequently, the observations made here should be taken as true only for the sand and model adopted.…”

Section: Resultsmentioning

confidence: 99%

Drained cavity expansions in soils of finite radial extent subjected to two boundary conditions

Pournaghiazar

Russell

Khalili

2011

Num Anal Meth Geomechanics

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The problem of drained cavity expansion in soils of finite radial extent is investigated. Cylindrical and spherical cavities expanded from zero radius subjected to either constant stress or zero displacement at the finite boundary are considered. The generalised analytical solution procedure presented enables more advanced constitutive models to be implemented than have been possible in previous studies. Results generated for Sydney quartz sand highlight substantial differences between cavity limit pressures for the two boundary conditions and for boundaries of finite and infinite radial extent. This is of significance in accounting for boundary effects when interpreting cone penetration tests conducted in calibration chambers.

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“…They adopted a "spherical cavity expansion forcing function" based on a finite-sized cavity to compensate for the near-surface effects of geological media penetration. Jiang and Sun [56] employ a constitutive model that considers the role of grains fracture to obtain improved behavior target under impact. The better prediction of the sand under complex shape projectile impact is obtained by Kotov et al [57] by incorporating the local projectile-target interaction assuming each element of the projectile interacts independently in the sand media.…”

Section: Granular Target Mediamentioning

confidence: 99%

Advances in Projectile Penetration Mechanism in Soil Media

et al. 2020

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The penetration to geological shield occurs in many situations at various velocities and scales, for example, meteor-cratering, pile driving, falling of objects from high-rise building construction, and debris/fragments from failed components. The soil media is an efficient energy dissipation system and effective shock protection shield. Impact circumstances are currently getting widespread attention. A lot of research has been done on soil media for impact and penetration. The phenomenon of dynamic penetration in heterogeneous particulate soil medium is very complex and the target soil media under dynamic impact especially under high speed and deep penetration neither behave completely as solid nor as liquid. The topics of recent research interest in the field of penetration to soil media and their significant findings are critically reviewed in the present study. The dedicated review of analytical, empirical, experimental, and computational methods to predict the response of soils media-impacting objects to penetration is presented. The emerging challenges in fundamental research of penetration into soil media are outlined and it is an attempt to formulate the future research directions in the field of soil media penetration.

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Cavity expansion analyses of crushable granular materials with state‐dependent dilatancy

Cited by 44 publications

References 68 publications

The cone penetration test in unsaturated sands

The cone penetration test in unsaturated sands

Drained cavity expansions in soils of finite radial extent subjected to two boundary conditions

Advances in Projectile Penetration Mechanism in Soil Media

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