Thin layer shearing of a highly plastic clay

Balthasar, K.; Gudehus, G.; Külzer, Michael; Bertini, A. B. Libreros

doi:10.5194/npg-13-671-2006

Cited by 13 publications

(8 citation statements)

References 17 publications

(20 reference statements)

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“…Shear tests with thin layers of remoulded and consolidated saturated clay by Balthasar et al [1] exhibit features beyond those outlined by Terzaghi [24], as shown in Fig. 3.…”

Section: Water-saturated Soil With Critical Phenomenamentioning

confidence: 71%

“…On the other hand, the p w -neutrality of the mineral is sufficient for r 0 ij ¼ r ij À p w d ij by (1) to be the stress tensor of the solid fabric. In an experiment with a volume element of water-saturated soil, a quasi-static change of 1 3 r ii and of p w by the same amount would thus not change the state of the solid fabric, in particular its stress r 0 ij and void ratio e. In an equivalent experiment, r 0…”

Section: Water-saturated Soil In the Stable Rangementioning

confidence: 98%

“…Shao et al [21] present an overview of publications concerning (1). They take over the notion 'skeleton' from Terzaghi [23], which he later replaced by 'porous solid' [24].…”

Section: Water-saturated Soil In the Stable Rangementioning

confidence: 99%

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Implications of the principle of effective stress

Gudehus

2020

Acta Geotech.

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While Terzaghi justified his principle of effective stress for water-saturated soil empirically, it can be derived by means of the neutrality of the mineral with respect to changes of the pore water pressure $$p_w$$ p w . This principle works also with dilating shear bands arising beyond critical points of saturated grain fabrics, and with patterns of shear bands as relics of critical phenomena. The shear strength of over-consolidated clay is explained without effective cohesion, which results also from swelling up to decay, while rapid shearing of water-saturated clay can lead to a cavitation of pore water. The $$p_w$$ p w -neutrality is also confirmed by triaxial tests with sandstone samples, while Biot’s relation with a reduction factor for $$p_w$$ p w is contestable. An effective stress tensor is heuristically legitimate also for soil and rock with relics of critical phenomena, particularly for critical points with a Mohr–Coulomb condition. Therein, the $$p_w$$ p w -neutrality of the solid mineral determines the interaction of solid fabric and pore water, but numerical models are questionable due to fractal features.

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“…Shear tests with thin layers of remoulded and consolidated saturated clay by Balthasar et al [1] exhibit features beyond those outlined by Terzaghi [24], as shown in Fig. 3.…”

Section: Water-saturated Soil With Critical Phenomenamentioning

confidence: 71%

Section: Water-saturated Soil In the Stable Rangementioning

confidence: 98%

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Implications of the principle of effective stress

Gudehus

2020

Acta Geotech.

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“…Also, most of the latest published in-house developments have reported maximum forces of about 500 kN, pure mechanical loading and no dynamics [e.g. Gomez (2008); Geertsma (2002); Balthasar et al (2006); Kim et al (2006); Jiang et al (2004); Seidel and Haberfield (2002); Wong et al (2007)]. Superimposed dynamic testing and/or hydro-mechanical coupled testing was reported by Buzzi et al (2008) and Barla et al (2007Barla et al ( , 2010, but on significantly smaller samples and devices of quite different types.…”

Section: Introductionmentioning

confidence: 90%

A New Large Dynamic Rockmechanical Direct Shear Box Device

2012

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“…Recently, the model has also been extended to clayey soil, e.g. [2,24,30,43]. Hypoplastic models have also been used to solve boundary value problems, e.g.…”

Section: Introductionmentioning

confidence: 99%

Hypoplastic modelling of moisture-sensitive weathered rockfill materials

Bauer

2009

Acta Geotech.

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For broken rock materials under stress the process of weathering and consequently the degradation of the solid hardness may be accelerated under water. Thus, the resistance of particles against abrasion and breakage can be strongly influenced by a change of the moisture content of the grains. The focus of this paper is on modelling the essential mechanical properties of moisturesensitive weathered coarse-grained rockfill materials using a hypoplastic constitutive model. The model takes into account the current void ratio, the effective stress, the strain rate and a moisture-dependent degradation of the solid hardness. Creep and stress relaxation during the process of degradation of the solid hardness are also included. It is shown that the results obtained from numerical simulations are in good agreement with experiments carried out with weathered granite.

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Thin layer shearing of a highly plastic clay

Cited by 13 publications

References 17 publications

Implications of the principle of effective stress

Implications of the principle of effective stress

A New Large Dynamic Rockmechanical Direct Shear Box Device

Hypoplastic modelling of moisture-sensitive weathered rockfill materials

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