Shear Band Formation in Plane Strain Experiments of Sand

Alshibli, Khalid A.; Sture, Stein

doi:10.1061/(asce)1090-0241(2000)126:6(495)

Cited by 219 publications

(96 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Once compacted, the sample will be sheared biaxially under different confining pressures. The testing procedure consists of two different phases in analogy with experimental procedures used in soil mechanics biaxial and triaxial tests (Figures 1b and 1c) [e.g., Bardet, 1997;Alshibli and Sture, 2000]. First, the sample is subjected to a uniform confining pressure along its boundaries.…”

Section: Numerical Proceduresmentioning

confidence: 99%

Rheology, force transmission, and shear instabilities in frictional granular media from biaxial numerical tests using the contact dynamics method

et al. 2005

View full text Add to dashboard Cite

[1] By means of the contact dynamics discrete element method, we investigate the quasistatic behavior of granular media composed of rigid frictional particles. Eluding specific modeling of the contact rheology, this method is suitable for numerical simulation of the plastic deformations of granular materials. We studied the macroscopic stress-strain and volume-change behavior, as well as force transmission and shear instabilities, in a two-dimensional biaxial geometry for dense samples composed of 5000 rigid disks. The peak and residual strengths and shear bands were analyzed by varying the confining pressure and the coefficient of friction between particles. The results are consistent with well-known features of the plasticity of noncohesive granular media. The mechanical behavior is rigid-plastic governed by a Mohr-Coulomb yield criterion and showing strain hardening and softening. Conjugated shear bands characterize plastic failure. The volumetric strain is globally dilatant with considerable expansion observed along shear bands. The macroscopic coefficient of friction, determined from peak and residual strengths, increases nonlinearly and saturates to a constant value as a function of contact friction. The strong force chains are mostly parallel to the major principal stress axis, yet deviations are observed near the shear bands. These chains are often composed of particles that are larger than the average. The deviatoric stress shows small fluctuations often in the form of rapid falls that are correlated with tiny contractional events. This behavior is interpreted in terms of the propagation of dynamic shear instabilities along the shear bands, in close analogy with stick-slip behavior.Citation: Taboada, A., K.-J. Chang, F. Radjaï, and F. Bouchette (2005), Rheology, force transmission, and shear instabilities in frictional granular media from biaxial numerical tests using the contact dynamics method,

show abstract

Section: Numerical Proceduresmentioning

confidence: 99%

Rheology, force transmission, and shear instabilities in frictional granular media from biaxial numerical tests using the contact dynamics method

et al. 2005

View full text Add to dashboard Cite

show abstract

“…Oda et al 1978;Tatsuoka et al 1990, Alshibli andSture 2000;Wanatowski and Chu 2006), directional shear cells (Phillips and May 1967;Oda and Konishi 1974a, b;Wong and Arthur 1985), true triaxial apparatuses (Arthur and Menzies 1972;Yamada and Ishihara 1979;Ochiai and Lade 1983;Miura and Toki 1984;Abelev and Lade 2004) and hollow cylinder apparatuses (e.g., Symes et al 1988;Miura and Toki 1986;Vaid et al 1990;Gutierrez et al 1991;Nakata et al 1998;Rolo 2003;Lade et al 2008;Cai et al 2013). …”

Section: ! Introductionmentioning

confidence: 99%

Experimental investigation on the deformation characteristics of granular materials under drained rotational shear

Yang

et al. 2015

Geomechanics and Geoengineering

View full text Add to dashboard Cite

Abstract:! This paper presents an experimental investigation revisiting the anisotropic stress-strainstrength behaviour of geomaterials in drained monotonic shear using Hollow Cylinder Apparatus. The test program has been designed to cover the effect of material anisotropy, preshearing, material density and intermediate principal stress on the behaviour of Leighton Buzzard sand. Experiments have also been performed on glass beads to understand the effect of particle shape. This paper explains phenomenological observations based on recently acquired understanding in micromechanics, with attention focused on strength anisotropy and deformation non-coaxiality, i.e., non-coincidence between the principal stress direction and the principal strain rate direction. The test results demonstrate that the effects of initial anisotropy produced during sample preparation is significant. The stress-strain-strength behaviour of the specimen shows strong dependence on the principal stress direction. Pre-loading history, material density and particle shape are also found to be influential. In particular, it was found that non-coaxiality is more significant in preloaded specimens. The observations on the strength anisotropy and deformation non-coaxiality were successfully explained based on the Stress-

show abstract

“…Furthermore, standard test procedures (ASTM D5321-02) (ASTM, 2002) to determine the frictional strength of geosynthetic-soil interfaces are based on the direct shear test. For these reasons, more experimental and numerical studies on the test have been conducted in the past three decades (Arthur et al, 1977;Scarpelli & Wood, 1982;Jewell & Wroth, 1987;Potts et al, 1987;Palmeira & Milligan, 1989;Alshibli & Sture, 2000;Lings & Dietz, 2004;Cerato & Lutenegger, 2006;Wang et al, 2007b). Some major conclusions of these studies include: (a) stresses and strains within the final failure zone are fairly uniform and progressive failure effects are minor, despite the non-uniform stresses and strains imposed by the box (Jewell & Wroth, 1987;Potts et al, 1987); (b) the peak shear strength from DSA is very close to that obtained in an ideal simple shear condition, and the deviation of the zero linear extension direction at peak from the horizontal is negligible (Potts et al, 1987;Wang et al, 2007b); (c) multiple shear bands propagate from the edge of the box towards the middle of the specimen, appearing as a function of specimen length, height and soil density (Scarpelli & Wood, 1982;Wang et al, 2007b); (d ) the measured friction angle generally decreases with increasing box size above a certain box size to maximum particle diameter ratio, owing to the room available in the box for the shear zone to develop fully (Jewell & Wroth, 1987;Cerato & Lutenegger, 2006).…”

Section: Introductionmentioning

confidence: 99%

Discrete element simulations of direct shear specimen scale effects

Wang¹,

Gutierrez²

2010

Géotechnique

111

View full text Add to dashboard Cite

This paper presents a study of the micromechanics of granular materials as affected by the direct shear test scale using the discrete element method (DEM). Parametric studies were conducted to investigate the effects of specimen length and height scales (in relation to the particle size) on the bulk material shear strength and shear banding behaviour in the direct shear test. A mesh-free strain calculation method previously developed by the authors was used to capture and visualise the evolution of strain localisation inside the direct shear box. Simulation results show that the maximum shear strength measured at the model boundaries increases with decreasing specimen length scale and increasing specimen height scale. Micromechanics-based analysis indicates that the local and global aspects of fabric change and failure are the major mechanisms responsible for the specimen scale effect. Global failure along the primary shear band prevails when the specimen length scale and length to height aspect ratio are small, while progressive failure becomes more likely when the specimen length scale and aspect ratio become larger. Further quantifications of the specimen scale effects on the macroscopic behaviour of granular materials rely on the fundamental understanding of quantitative relationships between material fabric, anisotropy and bulk strength.

show abstract

Shear Band Formation in Plane Strain Experiments of Sand

Cited by 219 publications

References 16 publications

Rheology, force transmission, and shear instabilities in frictional granular media from biaxial numerical tests using the contact dynamics method

Rheology, force transmission, and shear instabilities in frictional granular media from biaxial numerical tests using the contact dynamics method

Experimental investigation on the deformation characteristics of granular materials under drained rotational shear

Discrete element simulations of direct shear specimen scale effects

Contact Info

Product

Resources

About