Mechanical Properties of Multi-year Sea Ice PDF Download
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Author:
Publisher:
ISBN:
Category : Sea ice
Languages : en
Pages : 120
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Book Description
Author:
Publisher:
ISBN:
Category : Sea ice
Languages : en
Pages : 120
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Book Description
Author: Jacqueline A. Richter-Menge
Publisher:
ISBN:
Category : Ice
Languages : en
Pages : 44
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Book Description
Author: Malcolm Mellor
Publisher:
ISBN:
Category : Ice on rivers, lakes, etc
Languages : en
Pages : 52
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Book Description
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 588
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Book Description
Author:
Publisher:
ISBN:
Category : Cold regions
Languages : en
Pages : 8
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1126
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Book Description
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:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 506
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Book Description
Author: W. F. Weeks
Publisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages : 100
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Book Description
The review discusses the state of thinking of each of the main national groups investigating sea ice and gives an overall appraisal of the field as a whole. Emphasis is placed on (1) the physical basis for interpreting sea ice strength (phase relations, air volume, and structural considerations), (2) theoretical considerations (strength models, air bubbles and salt reinforcement, and interrelations between growth conditions and strength), (3) experimental results (tensile, flexural, shear, and compressive strength, elastic modulus, shear modulus and Poisson's ratio, time dependent effects, and creep), and (4) plate characteristics. The paper includes a review of problems in sea ice investigations, relates the chemical, crystallographic, mechanical, and physical aspects involved, and concludes by showing how to utilize this knowledge to solve practical problems. (Author).
Author: John B. Gregory
Publisher:
ISBN:
Category : Marine mineral resources
Languages : en
Pages : 192
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Book Description
Author: Gordon F. N. Cox
Publisher:
ISBN:
Category : Ice
Languages : en
Pages : 72
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Book Description
In many sea ice engineering problems the ice sheet is assumed to be a homogeneous plate whose mechanical properties are estimated from the bulk salinity and average temperature of the ice sheet. Typically no regard has been given to the vertical variation of ice properties in the ice sheet or to time of ice formation. This paper reviews some of the mechanical properties of sea ice, including ice tensile, flexural and shear strengths, as well as the ice modulus. Equations for these properties are given as functions of the ice brine volume, which can be determined from ice salinity and temperature. A numerical, finite difference model is developed to predict salinity and temperature profiles of a growing ice sheet. In this model ice temperatures are calculated by performing an energy balance of the heat fluxes at the ice surface. The conductive heat flux obtained from the energy balance is then used to calculate the rate of ice growth and ice thickness by applying the Stefan ice growth equation. Ice salinities are determined by considering the amount of initial salt entrapment at the ice/water interface and the subsequent brine drainage due to brine expulsion and gravity drainage. Ice salinity and temperature profiles are then generated using climatological data for the Central Arctic Basin. The profiles appear to be realistic and agree reasonably well with field data. Mechanical property data is developed to provide mechanical property profiles for first-year sea ice of different thicknesses, grown at different times of the winter. The predicted profiles give composite plate properties that are significantly different from bulk properties obtained by assuming homogeneous plates. (EDC).
