Results 141 to 150 of about 4,691 (191)

A True Triaxial Testing Cell

1988
Results of both drained and undrained triaxial tests performed with a true triaxial cell on both natural and artificial clays are presented and discussed. The true triaxial apparatus, which has been used for about 20 years, is fully described. The apparatus has recently been modified to improve the measurement of lateral deformations.
V Silvestri, RN Yong, AMO Mohamed
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The Cambridge True Triaxial Apparatus

1988
In true triaxial apparatus, samples of soil are subjected to three independent principal stresses and strains. Such apparatus can readily be used for controlled exploration of principal stress or principal strain space to provide information concerning the anisotropic response of the soil to aid the development of constitutive relations.
DW Airey, DM Wood
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True Triaxial Yielding and Hardening of Rock

Journal of Geotechnical Engineering, 1987
Analysis of test results for intact and granulated marbles (cemented and noncemented granular materials) adds to the indications that strain softening does not express a real material behavior; it highlights similarities in stressstrain relations and confirms equality of a stress and a plastic strain invariant. The physical meaning of the parameters of
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Simulation of triaxial and true triaxial tests on natural and reconstituted Pisa clay

Géotechnique, 2002
A kinematic hardening/bounding surface plasticity model is used to reproduce the experimental behaviour of the natural soft clay found at Pisa. The model accounts for progressive loss of structure with plastic strains, and can be made to degenerate into a structureless state. Model parameters are calibrated on drained triaxial probing tests on natural
CALLISTO, Luigi, GAJO A., MUIR WOOD D.
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Analysis of Shear Banding in True Triaxial Tests on Sand

Journal of Engineering Mechanics, 2001
A series of true triaxial tests have been performed on rectangular prismatic specimens of Santa Monica Beach sand at three different relative densities to study the occurrence of failure, mechanism...
Lade, Poul V., Wang, Q.
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The true triaxial strength anisotropy of sand

Géotechnique
Sand exhibits transversely isotropic (TI) characteristics, with its strength properties influenced by the coupling effects of the intermediate principal stress ratio b and the orientation angle δ of the bedding plane (BP) relative to the major principal stress.
Dechun Lu, Jingyu Liang, Zhiwei Gao, Junhong Zhang, Xiuli Du   +4 more
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On the determination of true stress triaxiality in sheet metal

Journal of Materials Processing Technology, 2007
Abstract Material ductility, or the failure strain, is generally characterized by simple tensile tests. However, tensile tests on sheet samples lead to higher strain gradients than those observed in axisymmetric samples, so the classical Bridgeman correction is invalid.
A. Bacha, D. Daniel, H. Klocker
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True-triaxial strength criteria for rock

International Journal of Rock Mechanics and Mining Sciences, 2009
Abstract This paper reviews some strength criteria which include the role of the intermediate principal stress, and proposes a new criterion. Strength criteria of the form σ oct = f N ( σ oct ), such as Drucker–Prager, represent a rotation surface in the principal stress space, symmetric to the line σ 1 = σ 2 = σ 3 in the meridian plane ...
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Development of a True Triaxial Apparatus for Sands and Gravels

Geotechnical Testing Journal, 2008
Abstract This paper presents a recently developed true triaxial apparatus and a series of verification studies. The apparatus is capable of handling 241-mm cubical specimens providing the means for testing specimens under a wide variety of stress paths under drained and undrained conditions.
Changho Choi, Pedro Arduino, Michael D. Harney   +2 more
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Endochronic Modeling of Sand in True Triaxial Test

Journal of Engineering Mechanics, 1985
The endochronic constitutive equation is written in differential form, which is then used to describe the deviatoric behavior of drained sand in true triaxial test. Explicit equations have been derived. The modified concept of intrinsic time is applied so that no built‐in discontinuities exist in the constitutive equation. Triaxial compression test (TC)
Han C. Wu, Zhan K. Wang, M. R. Aboutorabi   +2 more
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