[PDF] Creep Rupture At Depth In A Cold Ice Sheet eBook

Author : Samuel C. Colbeck
Publisher :
Page : 733 pages
File Size : 17,82 MB
Release : 1978
Category :
ISBN :

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Discusses fracture at 240 m depth in Greenland, revealed during drilling.

Author : W. S. B. Paterson
Publisher : Elsevier
Page : 491 pages
File Size : 22,14 MB
Release : 2016-10-27
Category : Science
ISBN : 1483287254

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This updated and expanded version of the second edition explains the physical principles underlying the behaviour of glaciers and ice sheets. The text has been revised in order to keep pace with the extensive developments which have occurred since 1981. A new chapter, of major interest, concentrates on the deformation of subglacial till. The book concludes with a chapter on information regarding past climate and atmospheric composition obtainable from ice cores.

Author :
Publisher :
Page : 156 pages
File Size : 50,71 MB
Release : 1977
Category : Glaciology
ISBN :

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"This report documents most of the ice cores so far collected on a world-wide basis, as well as providing information on literature sources and on the currents status of research activities which may affect the types of data that can be archived."--Foreword.

Author : Erland M. Schulson
Publisher : Cambridge University Press
Page : 403 pages
File Size : 10,71 MB
Release : 2009-04-30
Category : Science
ISBN : 0521806208

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The first complete account of the physics of the creep and fracture of ice, for graduates, engineers and scientists.

Author : D. E. Nevel
Publisher :
Page : 122 pages
File Size : 17,58 MB
Release : 1976
Category : Ice
ISBN :

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The problem investigated in this thesis is the prediction of the deflection and stresses in a floating ice sheet under loads which act over a long period of time. This problem is currently important for oil exploration offshore in the Arctic. A review of analytical methods for predicting the bearing capacity of an ice sheet is given. The problem is formulated by assuming the ice is isotropic with a constant Poisson's ratio. The shear modulus is assumed to obey a linear viscoelastic model. The specific model selected is a series of one Maxwell model and two Voigt models. One of the Voigt models has a negative spring constant which produces tertiary creep. The ice model exhibits a primary, secondary, and tertiary creep response, similar to that observed in uniaxial creep tests of ice. The material properties in the viscoelastic model may be a function of the vertical position in the ice sheet, but all these material properties must be proportional to the same function of position. Using the thin-plate theory for the floating ice sheet, the solution is obtained for the deflection and stresses in the ice sheet for primary, secondary, and tertiary creep regions. It is then shown that for a load that is not distributed over a large area, the time-dependent part of the deflection and stresses is relatively independent of the load's distribution. For the elastic case, the stress significantly depends upon the load's distribution. Results are given for the deflection and stresses as a function of time and distance from the load. The maximum deflection and stresses occur at the center of the load. At this point the deflection increases with time, while the stresses decrease; i.e., the stresses relax. (Author).