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Title:	Elastic properties of processed snow with reference to its internal structure
Authors:	Nakaya, Ukichirō, 1900-1962.
Keywords:	Elasticity Elastic properties Snow Processed snow Snow properties Snow structures Snow internal structures
Publisher:	Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.)
Series/Report no.:	Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 82.
Description:	Research Report Introduction: In the summer of 1957, the visco-elastic properties of snow in the Greenland Ice Cap were studied by the sonic method (Nakaya, 1959). In 1958, the visco-elastic properties of snow processed by the Peter snow miller were investigated with special reference to its age hardening (Nakaya, I960). The experiments reported here were made in the summer of 1959 on snow processed by the Peter miller and the Snowblast miller at Site 2, 220 miles east of Thule, near 78°N latitude. The altitude is about 7000 ft. In these experiments Young's modulus of various kinds of processed snow was measured as a function of density and age hardening. A thin section of each sample was made and the internal structure was examined. The samples were solidified in aniline at a temperature below -15°C, and brought back in dry ice to the USA SIPRE laboratory in Wilmette, Illinois. Thin sections were made and photographed in the SIPRE laboratory. The mechanism of age hardening was clarified by examining the rate of increase of Young's modulus together with the mode of growth of bonds between ice grains, as revealed in thin section.
Rights:	Approved for public release; distribution is unlimited.
URI:	http://hdl.handle.net/11681/5891
Appears in Collections:	Research Report