On the determination and evolution of fabric in representative elementary volumes for a sand specimen in triaxial compression

被引：12

作者：

Schmidt, Selma ^{[1
]}

Wiebicke, Max ^{[1
,2
]}

Herle, Ivo ^{[1
]}

机构：

[1] Tech Univ Dresden, Inst Geotech, George Bahr Str 1a, D-01069 Dresden, Saxony, Germany

[2] Univ Sydney, Sydney Ctr Geomech & Min Mat, Sch Civil Engn, Sydney, NSW 2006, Australia

来源：

GRANULAR MATTER | 2022年 / 24卷 / 04期

关键词：

REV; Fabric; Heterogeneity; Sand; X-ray CT; Inter-particle contacts; SHEAR BANDS; DISCRETE;

D O I：

10.1007/s10035-022-01262-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The soil response in triaxial compression tests, that are commonly treated as element tests, is known to be inhomogeneous. Several studies have revealed the localisation of deformation throughout the whole specimen by digital image correlation techniques on X-ray tomographies. The fabric of a soil specimen has so far only been studied on complete specimens as a bulk measurement or in chosen subsets. In this contribution, we present a study on the spatial and temporal distribution of the fabric throughout one Hostun sand sample in triaxial compression. Therefore, we calibrated the minimum representative element size first for three chosen fabric variables considering three different criteria. By distributing the elements in a regular grid over the specimen, we are able to clearly identify the onset of the localisation in terms of void ratio, coordination number and contact fabric anisotropy. Spatially and temporally the contact fabric variables precede the void ratio changes as they are much more sensitive to small changes.

引用

页数：9

共 25 条

[1] Extraction of physically realistic pore network properties from three-dimensional synchrotron X-ray microtomography images of unconsolidated porous media systems [J].

Al-Raoush, RI ;

Willson, CS .

JOURNAL OF HYDROLOGY, 2005, 300 (1-4) :44-64

[2] Representative elementary volume analysis of porous media using X-ray computed tomography [J].

Al-Raoush, Riyadh ;

Papadopoulos, Apostolos .

POWDER TECHNOLOGY, 2010, 200 (1-2) :69-77

[3] Equivalent continuum strain calculations based on 3D particle kinematic measurements of sand [J].

Amirrahmat, Siavash ;

Alshibli, Khalid A. ;

Jarrar, Maha F. ;

Zhang, Boning ;

Regueiro, Richard A. .

INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 2018, 42 (08) :999-1015

[4] Grain-scale experimental investigation of localised deformation in sand: a discrete particle tracking approach [J].

Ando, Edward ;

Hall, Stephen A. ;

Viggiani, Gioacchino ;

Desrues, Jacques ;

Besuelle, Pierre .

ACTA GEOTECHNICA, 2012, 7 (01) :1-13

[5] 3D Experimental Measurement of Lattice Strain and Fracture Behavior of Sand Particles Using Synchrotron X-Ray Diffraction and Tomography [J].

Cil, Mehmet B. ;

Alshibli, Khalid A. ;

Kenesei, Peter .

JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 2017, 143 (09)

[6] Void ratio evolution inside shear bands in triaxial sand specimens studied by computed tomography [J].

Desrues, J ;

Chambon, R ;

Mokni, M ;

Mazerolle, F .

GEOTECHNIQUE, 1996, 46 (03) :529-546

[7] How does strain localise in standard triaxial tests on sand: Revisiting the mechanism 20 years on [J].

Desrues, Jacques ;

Ando, Edward ;

Mevoli, Federica A. ;

Debove, Laurent ;

Viggiani, Gioacchino .

MECHANICS RESEARCH COMMUNICATIONS, 2018, 92 :142-146

[8] Strain localisation in granular media [J].

Desrues, Jacques ;

Ando, Edward .

COMPTES RENDUS PHYSIQUE, 2015, 16 (01) :26-36

[9] Discrete particle translation gradient concept to expose strain localisation in sheared granular materials using 3D experimental kinematic measurements [J].

Druckrey, A. M. ;

Alshibli, K. A. ;

Al-Raoush, R. I. .

GEOTECHNIQUE, 2018, 68 (02) :162-170

[10]

Fonseca J, 2013, GEOTECHNIQUE, V63, P487, DOI [10.1680/geot.12.P.003, 10.1680/geot.12.P003]

← 1 2 3 →