Monotonic and cyclic oedometer tests on sand at high stress levels

Uygar, Eriş; Doven, Ata G.

doi:10.1007/s10035-005-0216-z

Cited by 21 publications

(18 citation statements)

References 11 publications

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“…15a. The compression curves are in accordance with those obtained from experiments: Bauer [30], Nakata et al [13], Uygar and Doven [38], and Guimaraes et al [3] published similar compression curves. The curves for the overall and core void ratios are largely proportional, but the overall void ratio is much higher due to the voids along the specimen boundaries.…”

Section: Interpretation Of the Compression Curvessupporting

confidence: 88%

Grain crushing and high-pressure oedometer tests simulated with the discrete element method

Laufer¹

2015

Granular Matter

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The present paper investigates the influence of microstructural inhomogeneities of brittle grains on grain crushing in cohesionless, frictional granular materials, using the discrete element method. Macrograins are modelled as assemblies of bonded micrograins of different sizes and bond strengths to simulate crushed sandstone. A method is suggested to incorporate fracture mechanical properties in the model through the selection of bond properties. Normal distribution of bond strengths, as well as degraded bonds are assumed to simulate bond defects. Their effects are first examined through single macrograin crushing tests. Then monotonic oedometer compression tests on macrograin ensembles are simulated for a wide range of pressures and different initial void ratios. The paper also explores the applicability of Bauer's macroscopic compression law to the results of simulations of monotonic, oedometric compression tests. Correlations between the properties of individual macrograins, such as crushing strength and bonding defects, and the properties of the grain ensemble, such as granular hardness and grain size distribution are investigated.

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Section: Interpretation Of the Compression Curvessupporting

confidence: 88%

Grain crushing and high-pressure oedometer tests simulated with the discrete element method

Laufer¹

2015

Granular Matter

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“…The compression index for the fully saturated specimen is about 0.225, but decreases to about 0.08 for both the air-dried and oven-dried specimens. Uygar and Doven (2006) presented oedometer compression test results for saturated and dry sand commonly found in the southeast coast of Cyprus. These show that, under the same relative density (I d ), the compression index of the saturated sand is about twice larger than that of the dry specimens ( Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Modeling Unsaturated Soil Behaviour in Stress-Saturation Space

Sheng

Zhou

2012

GeoCongress 2012

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This paper presents an alternative approach for interpreting unsaturated soil behaviour. In this approach, all constitutive laws are built in the space of stress versus degree of saturation. A new volume change equation is proposed in terms of stress and degree of saturation, to give a better explanation to the non-linear change of soil compressibility under constant suctions. The soil compression index is assumed to be a function of the effective degree of saturation. The yield surface is established in the plane of the effective degree of saturation and the Bishop effective stress. The proposed model is then validated against a variety of experimental data in literature.

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“…The soil compression curve mostly obtained in literature is presented as a void ratio and normal stress dependence (Uygar, Doven, 2006). Other authors present soil compression curves with vertical loading from 5 to 10 kPa (Comina et al, 2008;Shipton, Coop, 2012).…”

Section: Introductionmentioning

confidence: 99%

Comparison of one-step and step-wise compression tests

Skuodis¹,

Karaman²,

Dirgėlienė³

2017

geol-geogr

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. The primary purpose of this paper is to investigate the influence of loading procedure type. To reach this aim, we have chosen the Baltic Sea Klaipėda sand, due to granulometry composition and particles shape. The paper examines several key aspects of sand compression type, namely comparison between one-step (constant rate loading) and step-wise (incremental loading) oedometer compression tests. In this manuscript, we present investigation of sandy soil compression character up to maximum 400 kPa loading. This research shows the difference between two loading procedures. The main objects of research: investigation of stress jumps during one-step and step-wise soil sample loading. The analysis of the results shows that when soil was compressed by step-wise loading procedure (0.94 mm) displacements were almost twice as big as in case of one-step loading procedure (0.57 mm).

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Monotonic and cyclic oedometer tests on sand at high stress levels

Cited by 21 publications

References 11 publications

Grain crushing and high-pressure oedometer tests simulated with the discrete element method

Grain crushing and high-pressure oedometer tests simulated with the discrete element method

Modeling Unsaturated Soil Behaviour in Stress-Saturation Space

Comparison of one-step and step-wise compression tests

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