Deformation behaviour and strength of frozen sand

Parameswaran, V. R.

doi:10.1016/0148-9062(81)90308-9

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…By comparing the two curves, the logarithmic function is superior in fitting the test data. Similar results can also be found in .…”

Section: Model Performancesupporting

confidence: 90%

Modeling the viscous behavior of frozen soil with hypoplasticity

2016

Num Anal Meth Geomechanics

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SUMMARYThis paper presents a hypoplastic constitutive model for the viscous behavior of frozen soil. The model is composed of a 'solid' part and a 'fluid' part. The solid part is based on the extended hypoplastic model, and the fluid part is dependent on the second time derivative of strain. The performance of the model is demonstrated by simulating some uniaxial compression tests at different strain rates. Moreover, the model can describe in a unified way the three stages of typical creep tests, that is, primary, secondary, and tertiary stage.

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“…By comparing the two curves, the logarithmic function is superior in fitting the test data. Similar results can also be found in .…”

Section: Model Performancesupporting

confidence: 90%

Modeling the viscous behavior of frozen soil with hypoplasticity

2016

Num Anal Meth Geomechanics

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“…The initial tangent modulus Ei calculated from the linear portion of the stress-strain curves shown in Figure 3 varied between I 250 and 2 000 MPa. This value is somewhat smaller than the value of Ei calculated from unconfined compression tests at -10°C, namely 2500 MPa (Parameswaran, 1980). The modulus seemed to decrease with increasing hydrostatic pressure.…”

Section: Resultscontrasting

confidence: 57%

“…The mechanical behaviour of frozen soil specimens is governed by the intrinsic material properties such as moisture content, air bubbles, salts, organic matter, and grain size, and by externally imposed testing conditions such as strain-rate, temperature, stress and strain history, a nd confining pressure. Several authors (Andersland and Akili, 1967 ;Goughnour and Andersla nd , 1968;Andersland and AlNouri, 1970;Kaplar, 1971;Perkins and Ruedrich, 1973; Ruedrich a nd Perkins, 1974;Parameswaran, 1980) have studied the strength and deformation b ehaviour of various frozen soils under different conditions of temperature and strain-rate. Besid es these, the Proceedings of three International Conferences on Permafrost (Lafayette, India na, U .S.…”

Section: Introductionmentioning

confidence: 99%

Triaxial Testing of Frozen Sand

Parameswaran

Jones

1981

J. Glaciol.

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ABSTRACT. Triaxial testing of frozen saturated Ottawa sand under confined compression was carried out under hydrosta tic pressures varying between 0.1 and 75 MPa at a temperature of -lO o G and strain-rate 7.7 X 10-5 S-I. Yield and failure stresses increased with increasing hydrostatic pressures up to about 40 MPa, beyond which the stresses dropp ed. The results a re analysed according to the M ohr-Goulomb failure criterion and compared with past results in the literature. R EsuME.

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“…A similar result was found in higher‐temperature direct shear experiments on undisturbed rock glacier material from the Yukon, Canada, though the relative increase in strength was subdued compared to colder experiments [ Nickling and Bennett , ]. In most of these experiments, the peak strength corresponded to a relatively high debris concentration and when the pore spaces were completely filled with ice, and this strength was only weakly sensitive to the rate of deformation for temperatures below −5°C [ Baker , ; Parameswaran , ; Baker and Jones , ]. Higher‐temperature experiments (e.g., −2°C) exhibited more rate‐sensitive creep at relatively low shear rates [ Baker , ; Bragg and Andersland , ].…”

Section: Experimental Constraintsmentioning

confidence: 99%

Deformation of debris-ice mixtures

2014

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Mixtures of rock debris and ice are common in high-latitude and high-altitude environments and are thought to be widespread elsewhere in our solar system. In the form of permafrost soils, glaciers, and rock glaciers, these debris-ice mixtures are often not static but slide and creep, generating many of the landforms and landscapes associated with the cryosphere. In this review, a broad range of field observations, theory, and experimental work relevant to the mechanical interactions between ice and rock debris are evaluated, with emphasis on the temperature and stress regimes common in terrestrial surface and near-surface environments. The first-order variables governing the deformation of debris-ice mixtures in these environments are debris concentration, particle size, temperature, solute concentration (salinity), and stress. A key observation from prior studies, consistent with expectations, is that debris-ice mixtures are usually more resistant to deformation at low temperatures than their pure end-member components. However, at temperatures closer to melting, the growth of unfrozen water films at ice-particle interfaces begins to reduce the strengthening effect and can even lead to profound weakening. Using existing quantitative relationships from theoretical and experimental work in permafrost engineering, ice mechanics, and glaciology combined with theory adapted from metallurgy and materials science, a simple constitutive framework is assembled that is capable of capturing most of the observed dynamics. This framework highlights the competition between the role of debris in impeding ice creep and the mitigating effects of unfrozen water at debris-ice interfaces.

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Deformation behaviour and strength of frozen sand

Cited by 4 publications

References 7 publications

Modeling the viscous behavior of frozen soil with hypoplasticity

Modeling the viscous behavior of frozen soil with hypoplasticity

Triaxial Testing of Frozen Sand

Deformation of debris-ice mixtures

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