Author: I. SalaPublisher:
ISBN:
Category :
Languages : en
Pages : 5
Book Description
Experimental Studies on the Stress Concentration Index of Sea-ice
Author: I. SalaGeophysical Abstracts, 188 January-March 1962
Author: Geophysical Abstracts ...
Author: Geological Survey Bulletin
Author: The Mechanical Properties of Sea Ice
Author: W. F. WeeksPublisher:
ISBN:
Category : Ice mechanics
Languages : en
Pages : 100
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).
Geophysical Abstracts, 191 October-December 1962
Author: Research Report - Corps of Engineers, U.S. Army, Cold Regions Research and Engineering Laboratory
Author: Cold Regions Research and Engineering Laboratory (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 366
Book Description
Fracture of Lake and Sea Ice
Author: Wilford Frank WeeksPublisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 92
Book Description
The increased activity in cold regions has made a thorough understanding of fracture in lake and sea ice quite desirable, inasmuch as this information has application to a number of problems of geophysical as well as engineering importance. This survey starts with a discussion of the structure of ice I and the macro- and microstructure of sea and lake ice as well as their chemistry and phase relations. Recent work on the direct observation of dislocations as well as the formation of cracks in ice is summarized. Formal ice-brine-air models for analyzing variations in ice strength are also reviewed. The results of the different types of tests are discussed and compared (compressive, indentation, direct and ring-tension, small beam flexure and in situ cantilevers and simple beams, shear, and impact). Scale effects are considered as well as the rapid strength deterioration experienced by ice sheets in the spring. Finally, a number of recommendations are made concerning future research in this field. (Author).
Composition of Sea Ice and Its Tensile Strength
Author: A. AssurPublisher:
ISBN:
Category : Salt
Languages : en
Pages : 68
Book Description
Part of the salts contained in sea water are trapped in sea ice upon freezing. They form liquid and solid inclusions in a systematic pattern. The amount depends upon temperature and salinity. A detailed table of phase relations is given and a general theory is derived to show how the internal cavities may affect the strength of sea ice. The general theory leads to specific models. The principle of ring tensile strength tests is explained and a series for evaluation is given. Test data lead to a substantiation of theoretical principles and to an illustration of several hypotheses concerning the effect of solid salt inclusions upon strength. Observed sea ice phenomena are explained on the basis of internal structure. (Author).
Author: