Quantifying and modelling fabric anisotropy of granular soils

Yang, Z. X.; Li, X. S.; Yang, Jun

doi:10.1680/geot.2008.58.4.237

Cited by 252 publications

(107 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Because we are interested in dense aggregates of frictional particles, we require that the solid volume fraction φ is close to the random close packing value φ RCP 0.64. It is well known that different packing structures are obtained experimentally according to the preparation protocol [17,18]. Our approach is to generate numerical packings with different final structure.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Conventional approaches in the framework of solid-state elasticity consider the response to be dependent on the solid volume fraction and the stress state. On the other hand, micromechanics has supported the idea that along with macroscopic properties, the response of an aggregate is characterized by the fabric tensors and the coordination number [13,14,8,18]. The former refers to the geometric arrangement of the contacts, the latter is the (scalar) average number of contacts per particle.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A micromechanical numerical analysis for a triaxial compression of granular materials

Magnanimo¹,

Ragione

2013

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. We focus on a triaxial compression at constant pressure in which a granular material, after an isotropic preparation, is sheared in a small range of monotone deformation. The aggregate is made by identical, elastic, spheres that interact through a non central contact forces. Because of the loading condition the material is transversely isotropic. Through a numerical analysis we show that aggregates with same pressure and porosity behave differently depending on the initial coordination number (i.e. the average number of contacts per particle). The relation of stress, volume change, elastic moduli and microstructure with the initial contact network is investigated.

show abstract

Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A micromechanical numerical analysis for a triaxial compression of granular materials

Magnanimo¹,

Ragione

2013

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…Fabric anisotropic effects were studied on sandy soil responses by a series of experimental studies (Yu et al, 2013;Guo and Zhao, 2013;Louis et al, 2009 between microscopic and macroscopic structures Yang et al, 2008;Yang et al, 2013;Hicher and Chang, 2007;Kruyt and Rothenburg, 2016;Khalili and Mahboubi, 2014;Voiadjis et al, 1995;Kruyt and Rothenburg, 2014;Guo, 2014;Li and Yu, 2014;Yan, 2009;Chang and Hicher, 2005). Other studies have been conducted to predict the fabric anisotropic behaviour using different parameters and placing them in equations of constitutive model of soil (Yu et al, 2013;Yang et al, 2008;Gao et al, 2014;Dafalias and Manzari, 2004;Lashkari, 2009;Zhao and Guo, 2013;.…”

Section: Introductionmentioning

confidence: 99%

“…Other studies have been conducted to predict the fabric anisotropic behaviour using different parameters and placing them in equations of constitutive model of soil (Yu et al, 2013;Yang et al, 2008;Gao et al, 2014;Dafalias and Manzari, 2004;Lashkari, 2009;Zhao and Guo, 2013;. In addition, a few studies have been conducted to consider the effect of induced anisotropy by using constitutive models (Hareb and Doanh, 2012;Tang Tron Tran et al, 2014;Ye et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Modification of a Constitutive Model in the Framework of a Multilaminate Method for Post-Liquefaction Sand

Dashti

Sadrnejad

Ganjian

2017

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

The estimation of the value and direction of post-liquefaction deformations is one of the most challenging issues in the modelling of liquefaction soil, due to the inherent and induced anisotropy. It is very important in the science of soil-constitutive models to present a simple and comprehensive model for the prediction of fabric anisotropy effects in pre-and post-liquefaction behaviour in granular soil. In the framework of the multilaminate method, 17 planes with predetermined directions are defined, instead of defining all occurrences depending on the direction in three planes perpendicular to each other in a Cartesian coordinate system. As a result, calculation accuracy is increased in the point due to the effectiveness of the behaviours in different directions. In the present study, after modifying an advanced model by removing constants related to the fabric effect and using lower constants, the precision of model performance after the removal of constants was studied and compared with experimental results in different monotonic, cyclic, drained, and undrained loading conditions. After this, the formation of stress and strain in 17 planes was evaluated in terms of pre-and post-liquefaction, with monotonic and cyclic loadings. The study of the curves shows induced anisotropy in different directions of sandy soil and thus proves the capability of the model in this regard.

show abstract

“…Quartzitic sands recovered from river beds and coastal areas, for example, tend to be poorly graded (Ham River sand (Coop, 2003), Toyoura sand (Yang et al, 2008), Hostun sand (De Gennaro et al, 2004)), while some granular soils which result from in-situ erosion, for example decomposed granite (Lee and Coop, 1995), or some residual soils (Ferreira and Bica, 2006), are more likely to have well-distributed (poorly-sorted) particles sizes. Subglacial sediments, which also tend to be well graded, were transported and deposited by ice, and unlike any other sediment they were subjected to incessant shearing while depositing (Benn and Evans, 1998), with crushing and grinding at interparticle and particle-bed level (Boulton et al, 1974).…”

Section: Introductionmentioning

confidence: 99%

On the Particle Size Distribution of a Basaltic Till

Altuhafi

Baudet

Sammonds

2011

Soils and Foundations

View full text Add to dashboard Cite

Stress and strain history play a major role in deˆning theˆnal grading of a soil, and by studying how the particle size distribution of a soil evolves with stress and strain it may be possible to highlight some important aspects of the sediment past history. In this paper, the characteristics and evolution of the grading of a till from Iceland, so-called Langj äokull sediment, are examined. Specimens of the till were tested in compression (triaxial, oedometer tests) to very high pressures, and in shearing (triaxial, ring shear tests) to very high strains. The change in grading corresponding to particle breakage during compression and shearing was monitored using sieve analysis and scanning electron microscopy. The results show that the particle size distribution of the till, which is well graded, does not evolve when the till is subjected to high stresses or strains. Additional tests on specimens made of the larger-sized till particles did however show signs of breakage during testing. This suggests that the current natural grading of the till was achieved by incessant shearing during its past history, and corresponds to an ultimate,``critical'' grading. This is conˆrmed by the mineralogical analysis of the sediment, which highlights a single parent rock and weathering of the particles by mechanical processes only.

show abstract

Quantifying and modelling fabric anisotropy of granular soils

Cited by 252 publications

References 21 publications

A micromechanical numerical analysis for a triaxial compression of granular materials

A micromechanical numerical analysis for a triaxial compression of granular materials

Modification of a Constitutive Model in the Framework of a Multilaminate Method for Post-Liquefaction Sand

On the Particle Size Distribution of a Basaltic Till

Contact Info

Product

Resources

About