A constitutive model for sand in triaxial compression

Nova, Roberto; Wood, David Muir

doi:10.1002/nag.1610030305

Cited by 231 publications

(83 citation statements)

References 16 publications

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“…Rowe, 1962;Nova and Wood, 1979;Bolton, 1986;Pradhan and Tatsuoka, 1989;Chiaro et al, 2013), which relate the ratio of plastic strain increments ( ). This latter condition, which marks the change of soil behaviour from contractive to dilative, is referred to as the phase transformation (PT) state (Ishihara et al, 1975).…”

Section: Stress-dilatancy Relationship (Flow Rule)mentioning

confidence: 99%

Predicting the behaviour of coal wash and steel slag mixtures under triaxial conditions

2015

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The effective reuse and recycling of granular waste materials, namely coal wash (CW) and Basic Oxygen Steel slag (BOS), is economically beneficial and environmentally sustainable. Nevertheless, due to the heterogeneity of these granular waste materials, their ultimate adoption as structural fills must be supported by constitutive relationships capable of accurately describing the stress-strain behaviour under representative field loading conditions. In this paper, a critical-state-surface generalised-plasticity model is presented and its predictive capability using a single set of soil parameters is demonstrated for drained triaxial compression tests. Disciplines Engineering | Science and Technology Studies Publication DetailsChiaro, G., Indraratna, B. & Tasalloti, S. Ali. (2015). Predicting the behaviour of coal wash and steel slag mixtures under triaxial conditions. Canadian Geotechnical Journal, 52 (3) and Basic Oxygen Steel slag (BOS), is economically beneficial and environmentally sustainable.Nevertheless, due to the heterogeneity of these granular waste materials, their ultimate adoption as structural fills must be supported by constitutive relationships capable of accurately describing the stress-strain behaviour under representative field loading conditions. In this paper, a critical-statesurface generalised-plasticity model is presented and its predictive capability using an explicit set of soil parameters is demonstrated for drained triaxial compression tests.

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Section: Stress-dilatancy Relationship (Flow Rule)mentioning

confidence: 99%

Predicting the behaviour of coal wash and steel slag mixtures under triaxial conditions

2015

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“…Éste modelo matemático se publica en el año 1979 propuesto por Nova y Wood [35]. Donde teniendo en cuenta la relación de tensiones "n", proponen calcular la dilatancia como se muestra en la ecuación 9: …”

Section: Modelo De Novaunclassified

Estudio Y Evaluación De Los Modelos Matemáticos Para La Estimación De La Dilatancia

Rondón

Fuentes

Quintero

2015

revfue

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*A quien debe dirigirse la correspondencia RESUMEN el artículo muestra una revisión bibliográfi ca de los principales modelos que existen para el cálculo de la dilatancia en la roca. una vez explicado cada modelo, se procede a realizar el modelamiento matemático de ésta propiedad. Esto se realiza mediante datos suministrados por la literatura, las cuales son: esfuerzos sometidos a la roca σ1,σ2,σ3, ángulo de fricción interna ∅, pendiente de la línea de estado critico M, el parámetro de estado , y otras constantes que se requieren para cada modelo. Una vez hechos los cálculos de la dilatancia en la roca, se procede a validar el modelamiento con datos reales, los cuales también son suministrados por la literatura. En éstas pruebas se midió la dilatancia real en dos tipos de arena, (Banding y Miga) y se realizaron 5 pruebas. Finalmente éstas mediciones se compararon con los cálculos realizados, y así llegar a la conclusión de que el mejor modelo para predecir el fenómeno dilatante de una roca es el de Li & Dafalias.Palabras clave: Arenamiento, dilatancia, estado crítico, suelos granulares. Study and evaluation of mathematical models for estimating dilatancyABSTRACT the article shows a literature review of the main models that exist for the calculation of dilatancy in the rock, which is a property that has an application in the study of the phenomenon of sanding in oil wells. Having explained each model, we proceed to perform mathematical modeling of this property. This is done using data supplied by the literature, which are: strain in the rock σ1, σ2, σ3, internal friction angle ∅, slope of the critical state line M, the state parameter φ, and other constants which are required for each model. Once dilatancy calculations are made in the rock, we proceed to validate the modeling with real data, which are also supplied by the literature. in these tests, the dilatancy was measured in two types of sand, (Banding and crumb) from which 5 tests were done; these measurements were compared with calculations, and fi nally concludes that the best model to predict the dilatant rock phenomenon is Li & Dafalias.

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“…In triaxial conditions, the stress state is completely defined by p' and q. In most constitutive models for saturated soils, the plastic potential only depends on the stress inclination η (Roscoe and Burland, 1968, Wong and Mitchell, 1975, Nova and Wood, 1979. This assumption was later validated experimentally by Lanier et al (1991).…”

Section: Flow Rulementioning

confidence: 99%

Yielding and plastic behaviour of Boom clay

Sultan¹,

Cui²,

Delage³

2010

Géotechnique

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ABSTRACT:An Underground Research Laboratory (URL) has been constructed in the deposit of Boom clay at a depth of 223 m by the SCK-CEN Belgian organisation near the city of Mol. This URL is devoted to research into nuclear waste disposal. This paper presents the results of an investigation carried out in the triaxial apparatus on specimens that were trimmed from blocks extracted during excavation sequences in the URL.In order to characterize the mechanical behaviour of the natural Boom clay and to examine the effect of initial and induced anisotropy on its constitutive behaviour, two series of triaxial tests were carried out. Special attention was devoted to the yield behaviour and the effects of stress history. Experimental results showed a clear relation between the shape of yield curves and stress history. The yield curve of the clay in its initial state was oriented along the K 0 line, illustrating the anisotropy of fabric that was generated during the soil deposition. Subsequent isotropic compression (up to 9 MPa) made the yield curve more and more oriented along the p' axis.Based on these experimental results, an elasto-plastic model accounting for isotropic and anisotropic hardening in (p':q) space was developed. The initial yield curve of the soil was taken inclined with respect to the p' axis. The formulation proposed describes the change in shape, size and orientation of the yield curve, according to the stress history. Eight constitutive parameters were used to describe the anisotropic behaviour of the soil.

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A constitutive model for sand in triaxial compression

Cited by 231 publications

References 16 publications

Predicting the behaviour of coal wash and steel slag mixtures under triaxial conditions

Predicting the behaviour of coal wash and steel slag mixtures under triaxial conditions

Estudio Y Evaluación De Los Modelos Matemáticos Para La Estimación De La Dilatancia

Yielding and plastic behaviour of Boom clay

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