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Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher : Unknown
Page : 273 pages
File Size : 47,6 Mb
Release : 1992
Category : Arctic regions
ISBN : LCCN:93118665
Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher : Unknown
Page : 284 pages
File Size : 49,5 Mb
Release : 1992
Category : Arctic regions
ISBN : MINN:31951D031184761
Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher : Unknown
Page : 178 pages
File Size : 51,8 Mb
Release : 1981
Category : Engineering
ISBN : MINN:31951D03118477Z
Author : Anonim
Publisher : Unknown
Page : 128 pages
File Size : 54,7 Mb
Release : 1994
Category : Government publications
ISBN : WISC:89117117978
Author : Anonim
Publisher : Unknown
Page : 1592 pages
File Size : 53,6 Mb
Release : 1994
Category : Government publications
ISBN : UIUC:30112063914813
Author : Anonim
Publisher : Unknown
Page : 580 pages
File Size : 44,5 Mb
Release : 1994
Category : Documents librarians
ISBN : STANFORD:36105022051937
Author : Anonim
Publisher : Unknown
Page : 1176 pages
File Size : 46,6 Mb
Release : 1997
Category : Bibliographical literature
ISBN : UOM:39015079882356
Author : Anonim
Publisher : Unknown
Page : 288 pages
File Size : 48,7 Mb
Release : 1993
Category : Documents librarians
ISBN : UOM:39015064547485
Author : Anonim
Publisher : Unknown
Page : 762 pages
File Size : 55,9 Mb
Release : 1978
Category : Aeronautics
ISBN : UOM:39015057253612
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Cold Regions Research and Engineering Laboratory (U.S.)
Publisher : Unknown
Page : 84 pages
File Size : 53,8 Mb
Release : 1980
Category : Frozen ground
ISBN : OSU:32435021784905
Author : Henry W. Stevens
Publisher : Unknown
Page : 112 pages
File Size : 45,7 Mb
Release : 1975
Category : Frozen ground
ISBN : UCR:31210018909018
This study was conducted to provide reliable values of the stiffness and damping properties of frozen soils subjected to vibratory loads and to define the significant factors affecting these parameters. A laboratory test was conducted on prepared specimens of frozen soils wherein a right circular cylinder was subjected to steady-state sinusoidal vibration. The material was considered to be linearly viscoelastic. Analysis of test data based on one-dimensional wave propagation yielded the complex Young's modulus, the complex shear modulus, the phase velocity of wave propagation, the shear velocity, the damping property expressed as the angle representing time lag between stress and strain, an attenuation coefficient, and a complex Poisson's ratio. The frequency of vibration was varied from 500 to 10,000 Hz, and the peak dynamic stress was varied from 0.1 to 5.0 psi. Specimens were remolded or cored in-situ, frozen, and tested at temperatures of 0, +15 and +25 deg F.A few tests were conducted on identical soils nonfrozen. Tests results from a limited number of tests on selected soils indicate that the stiffness of these soils varies with the volume of ice/volume of soil ratio, and that ice is less stiff than saturated frozen soils. Frozen soils have stiffnesses up to 100 times those of identical soil nonfrozen. Depending upon the degree of ice saturation, the stiffness of non-saturated frozen soils varies from that of the saturated soils to nearly that of the nonfrozen soils. Stiffness increases with decreasing temperature but the rate is relatively low. As temperature rises and approaches the freezing point, stiffness abruptly decreases.
Author : Anonim
Publisher : Unknown
Page : 708 pages
File Size : 55,6 Mb
Release : 1979
Category : Water resources development
ISBN : UOM:39015007525457
Author : Thomas K. Edwards,David A. Curtiss
Publisher : Unknown
Page : 270 pages
File Size : 53,7 Mb
Release : 1991
Category : Rivers
ISBN : UOM:39015027824120
Author : State Biological Survey of Kansas
Publisher : Unknown
Page : 540 pages
File Size : 52,6 Mb
Release : 1976
Category : Natural history
ISBN : CORNELL:31924000819981
Author : Kansas. State Biological Survey
Publisher : Unknown
Page : 722 pages
File Size : 54,7 Mb
Release : 1976
Category : Electronic
ISBN : UIUC:30112028169230