Download or read book Triaxial Constant Strain Rate Tests and Triaxial Creep Tests on Frozen Ottawa Sand written by Francis H. Sayles and published by . This book was released on 1974 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Saturated frozen Ottawa sand cylinders and polycrystalline columnar ice were tested in the laboratory under triaxial compressive stress conditions using: (1) constant rate of axial strain, and (2) constant load, i.e. creep tests. The resulting stress-strain curves and Mohr envelopes for the constant rate of axial strain tests indicate that at rates of strain greater than about 0.02 per minute, the ice matrix fractures prior to the development of friction between the sand grains. At slower rates of applied strain, the friction between sand grains develops, presumably because ice has sufficient time to creep from between the sand grains. Results from the triaxial creep tests show that creep strength increases with confining pressure and axial creep strain is reduced by increasing the confining pressure. It is suggested that the long-term ultimate creep strength of saturated frozen sand is a function of the internal friction of the sand which could be determined through triaxial tests on freely drained unfrozen sand. (Modified author abstract).
Download or read book Small strain Behavior of Frozen Sand in Triaxial Compression written by and published by . This book was released on 1995 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stress-strain behavior of frozen Manchester fine sand has been measured in a high-pressure low-temperature triaxial compression testing system developed for this purpose. This system incorporates DC servomotor technology, lubricated end platens, and on-speciment axial strain devices. A parametric study has investigated the effects of changes in strain rate, confining pressure, sand density, and temperature on behavior for very small strains (0.001%) to very large (>20%) axial strains. This paper presents constitutive behavior for strain levels up to 1%. On-specimen axial strain measurements enabled the identification of a distinct upper yield stress (knee on the stress-strain curve) and a study of the behavior in this region with a degree of precision not previously reported in the literature. The Young's modulus is independent of strain rate and temperature, increases slightly with sand density in a manner consistent with Counto's model for composite materials, and decreases slightly with confining pressure. In contrast, the upper yield stress is independent of sand density, slightly dependent on confining pressure (considered a second order effect), but is strongly dependent on strain rate and temperature in a fashion similar to that for polycrystalline ice.
Download or read book Special Report written by and published by . This book was released on 1994 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 2834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety and Reliability written by TIM BEDFORD and published by CRC Press. This book was released on 2003-01-01 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings contain two hundred and eighteen papers representing the work of authors from countries across the world. They cover a wide range of research and applications in safety and reliability issues that concern all types of systems, processes and structures.
Download or read book Ground Freezing 1980 written by P.E. Frivik and published by Elsevier. This book was released on 2017-01-31 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: These papers cover mechanical properties and processes; thermal properties, processes and design; frost action in soils; and design and case histories.
Download or read book Thermodynamic Model of Creep at Constant Stresses and Constant Strain Rates written by Anatoly M. Fish and published by . This book was released on 1983 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications Cumulative Index written by United States. Superintendent of Documents and published by . This book was released on 1976 with total page 1466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey of Canada Open File 932 written by and published by Natural Resources Canada. This book was released on with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Creep and Strength Behavior of Frozen Silt in Uniaxial Compression written by Zhu Yuanlin and published by . This book was released on 1987 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uniaxial constant-stress and constant-strain-rate compression tests were conducted on more than 200 remolded, saturated, frozen specimens of rates show a close strength correspondence between the constant-stress and constant-strain-rate tests. All of these complete stress vs strain rate curves could not be described by a single power law or exponential equation, indicating that different deformation mechanisms are dominant within different ranges of strain rate.
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Information Service and published by . This book was released on 1976 with total page 1090 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Triaxial Relaxation Testing of a Frozen Sand written by and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this investigation was to evaluate the potential use of the laboratory stress relaxation test to determine the creep and strength properties of frozen soils. This paper presents the results of a series of laboratory step-loaded relaxation tests performed on frozen Ottawa sand under triaxial compression conditions and compares three different interpretation methods for deducing from the test results the creep and strength parameters of frozen soils.
Download or read book Geological Survey of Canada Open File 1135 written by and published by Natural Resources Canada. This book was released on with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CRREL Report written by and published by . This book was released on 1987 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permafrost written by Kaare Senneset and published by . This book was released on 1988 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers on climate change and geothermal regime, regional permafrost, physics and chemistry of frozen ground, frost heave mechanism, periglacial phenomena, geocryology, site investigations, subsea permafrost, geotechnical engineering and pipeline construction.
Download or read book CRREL Technical Publications 1950 1975 written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1992 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1980 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
