... model has been developed to predict the behaviour of calcareous sand under crushing conditions. First, particle crushing is quantified and represented through a proposed gradation evolution law. The reduction in void ratio on normal consolidation lines (NCLs) and critical state lines (CSLs...

... effect of specimen size and grading on the critical state shear strength of granular materials. The study covers a wide range of aspect ratios and demonstrates that the macroscopic response is stable for α ≥ 15 – which is significantly higher than the standard requirement of α ≥ 10...

... was investigated in light of the critical state soil mechanics framework using a series of direct simple shear (DSS) tests. A wide range of calcium carbonate content (C_C), initial void ratio after consolidation (e₀) and effective initial normal stress ( σ ′ N 0...

... dependency in both reversible and irreversible processes with a unique critical state envelope, and only eight material parameters with a readily measurable viscous parameter. A kinematic hardening in the logistic differential form in stress space is derived that enables the proposed model to function...

...Guoqing Cai; Bowen HAN; Saman Asreazad; Chao Liu; Annan Zhou; JIAN Li; Chenggang Zhao There are relatively few experimental studies on the hydromechanical and critical state behaviours of unsaturated silty sand. In this paper, suction-controlled, consolidated, drained triaxial shear tests were...

... viscosity and the paradigm of the critical state soil mechanics that is the uniqueness of the critical state friction envelope. A versatile force potential or dissipation rate function is presented that provides adjustability of the location of the critical state while securing a unique critical state...

... is that the liquefaction resistance of sand–fines mixtures, defined as the cyclic resistance ratio (CRR) leading to failure at a specific number of loading cycles, is almost uniquely related to the state parameter (ψ) defined in the critical state theory, regardless of particle size disparity and fines content...

...An Zhang; Yannis F. Dafalias; Mingjing Jiang A plasticity model is proposed to simulate the monotonic and cyclic behaviour of cemented sand. The model is an extension of the critical state-based bounding surface plasticity model originally developed for clean sand by researchers Y. F. Dafalias...

...J. BEDIN; F. SCHNAID; A.V. DA FONSECA; L.DE M. COSTA FILHO The results from a laboratory testing programme designed to evaluate the behaviour of gold tailings are presented, and interpreted in the critical state framework. Drained and undrained triaxial tests sheared under monotonic loading allowed...

...M. T. Manzari; Y. F. Dafalias Within the critical state soil mechanics framework, the two-surface formulation of plasticity is coupled with the state parameter to construct a constitutive model for sands in a general stress space. The operation of the two-surface model takes place in the deviatoric...

...I.F. Collins Collins, I. F. (1990).Giotechnique 40, No. 1, 12S129 TECHNICAL NOTE The nature of stress and velocity characteristics for critical stress states I. F. COLLINS* KEYWORDS: constitutive relations; plasticity; critical state; analysis. In simple plasticity models the strain rate eij...

...J. Graham; J. H. A Crooks; S. L. K Lau © 1988 Thomas Telford Ltd 1988 clays critical state overconsolidation state boundary surface symmetry yield envelopes yielding Graham, J., Crooks, J. H. A. & Lau, S. L. K. (1988). Gbtechnique 38, No. I, 12>134 Yield envelopes : identification...