Accession Number : AD0696401

Title :   PLASTIC DEFORMATION OF THICK-WALLED SNOW-ICE CYLINDERS UNDER HYDROSTATIC PRESSURE.

Descriptive Note : Research rept.,

Corporate Author : SNOW ICE AND PERMAFROST RESEARCH ESTABLISHMENT WILMETTE ILL

Personal Author(s) : Jellinek,H. H. G.

Report Date : JUL 1960

Pagination or Media Count : 12

Abstract : Experiments have been carried out on the plastic deformation of thick-walled snow-ice cylinders under hydrostatic pressure as a function of pressure and temperature. At constant circumferential stress and temperature the natural strain rate of closure is a constant. This constant varies with the circumferential stress according to a sine function and is exponentially dependent on temperature with an energy of activation of 14.1 kcal/mole at an average circumferential stress of 3.1 kg/sq cm. The mechanism of the plastic flow is in agreement with a mechanism proposed previously, that is, flow between grain boundaries takes place. (Author)

Descriptors :   (*GLACIERS, *UNDERGROUND STRUCTURES), (*ICE, CREEP), SNOW, CYLINDRICAL BODIES, HYDROSTATIC PRESSURE, LOADS(FORCES), TEMPERATURE, TIME, FUNCTIONAL ANALYSIS, STRESSES, STRAIN(MECHANICS), HEAT OF ACTIVATION, GRAIN BOUNDARIES, THERMAL PROPERTIES, PLASTIC PROPERTIES, TEST METHODS

Subject Categories : Snow, Ice and Permafrost
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE