Validación de modelos constitutivos avanzados de comportamiento mecánico para la arcilla estructurada de Brasilia

Mendoza, Cristhian; Farias, Márcio M.; Cunha, Renato Pinto da

doi:10.4067/s0718-28132014000100005

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…Furthermore, in cohesive and non-cohesive soils previous studies have shown that the strength increase due to higher strain rates can be related to soil viscosity (e.g. Locat & Demers, 1988;Sorensen, Baudet & Simpson, 2007;Mendoza, Farias & da Cunha, 2014). Then, further research is needed to study displacement rate effects assessing soil viscosity.…”

Section: Silty Zeolitementioning

confidence: 99%

Experimental study of the fine particles effect on the shear strength of tuff zeolites

Villalobos

Leiva²,

Jerez

et al. 2018

rdlc

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The effect of fine particles on the zeolite shear strength is assessed for possible construction applications. A brief geological description of the zeolite is presented. Three groups of zeolite samples were prepared, namely a coarse material with no fines, a finer material with 3% of silt and a silty material with 15% of clay. Results from standard classification, compaction and compressibility tests are shown and explained. It was found that due to the low specific gravity, low values of density were obtained in compaction tests. Additionally, shear strength tests were performed, resulting in different response in terms of shear stress and horizontal and vertical displacements. The coarse zeolite followed a similar friction-dilation response as in feldspathic and quartz sands. However, addition of 3% of fines reduced significantly the zeolite shear strength. Furthermore, the finest material was tested under two different displacement rates, reflecting also marked differences in shear strength and stiffness.

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Section: Silty Zeolitementioning

confidence: 99%

Experimental study of the fine particles effect on the shear strength of tuff zeolites

Villalobos

Leiva²,

Jerez

et al. 2018

rdlc

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“…The results showed that the Duncan-Chan model accurately predicted the soil behavior when a plastic failure is expected. Mendoza et al (2014) studied the mechanical behavior of the Brasilia's clay by triaxial tests and numerical simulations using three material models for the soil. Here, the subloading Cam Clay model presented a less rigid transition of the stressstrain relationship similar to the experimental results, while the hypoplasticity with structure model better represented the cementing effect in the drained triaxial tests.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical analysis of triaxial compression test for a clay soil

Hernández-Hernández

Joya-Cárdenas

Equihua-Anguiano

et al. 2021

Chil. j. agric. res.

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Soil compaction causes negative effects on crop yield and its mechanical response analysis has recently gained relevance for research through numerical methods. In this work, Finite Element Method (FEM) using the Mohr-Coulomb (MC) and Hardening Soil (HS) constitutive models were employed to simulate the mechanical response of a Vertisol agricultural soil. First, an experimental study of the unconsolidated-undrained (UU) triaxial compression test with different moisture contents (w = 10%, 20% and 34%) and confining pressures (σ3 = σc = 0.05 MPa, 0.10 MPa and 0.15 MPa) was carried out, to obtain the shear strength parameters cohesion (c) and friction angle (φ), as well as the Young's modulus (E) of the soil. The experimental study was conducted through a 3 2 factorial design with three replicates that it was used to evaluate the influence of the w and σc on E of the studied soil. Also, an analysis of the behavior of the φ and c parameters at each w was performed. Numerical simulations were done with similar conditions as the experimental tests with respect to loading and boundary conditions. A comparison of the mechanical response between numerical results and physical experiments was carried out. As a result, the MC model allowed to estimate satisfactorily the stress-strain relationship of the soil for w of 10% and 20%, while HS model exhibited a better approximation for w of 34% in comparison with the MC model. Finally, the methodology and the adjusted parameters of the agricultural soil obtained in this work, can be used in the study of soil compaction produced by the agricultural machinery.

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“…Various advanced constitutive models have been employed and tested. Some researchers used enhanced versions of Cam Clay, introducing isotropic damage (Puppi et al, 2018), influence of structure (Mendoza et al, 2014) or the subloading surface (Mendoza & Muniz de Farias, 2020). Others (Azevedo et al, 2006) have used the Lade's model and the discrete element modeling approach (Ibañez, 2008).…”

Section: Introductionmentioning

confidence: 99%

Constitutive modeling of residual soils based on irreversible strains decomposition

Cirone¹,

Vargas²,

Campos³

2020

S&R

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A constitutive model is proposed for describing the stress-strain behavior of saturated residual soils based on experimental observations from oedometer testing, triaxial and direct shear testing. The model is formulated within the classical theory of plasticity with a non-associated flow rule. In order to reproduce particular features of residual soils, inelastic strains are decomposed in two components, namely the plastic dilation due to the rearrangement of grains and the volumetric collapse resulting from bonds degradation. The yield surface is tear-drop shaped and obeys an isotropic volumetric strain-hardening rule related to collapse strains, along with a shear softening with developing plastic deviatoric strains. Comparison with published experimental data confirms the capability of the model of reproducing observed behavior of tropical residual soils in consolidated drained and undrained triaxial compression.

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Validación de modelos constitutivos avanzados de comportamiento mecánico para la arcilla estructurada de Brasilia

Cited by 6 publications

References 20 publications

Experimental study of the fine particles effect on the shear strength of tuff zeolites

Experimental study of the fine particles effect on the shear strength of tuff zeolites

Experimental and numerical analysis of triaxial compression test for a clay soil

Constitutive modeling of residual soils based on irreversible strains decomposition

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