Interpretation of the Tensile Strength of Ice Under Triaxial Stress PDF Download
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Author: D. E. Nevel
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 24
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Book Description
Author: D. E. Nevel
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 24
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Book Description
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 716
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Book Description
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 1216
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Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 992
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Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author: George D. Ashton
Publisher: Water Resources Publication
ISBN: 9780918334596
Category : Technology & Engineering
Languages : en
Pages : 504
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1068
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Book Description
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 588
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Book Description
Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 346
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Book Description
Author:
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 754
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Book Description
Author: D. E. Nevel
Publisher:
ISBN:
Category : Ice
Languages : en
Pages : 122
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Book Description
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).
