Experimental deformation of polycrystalline H2O ice at high pressure and low temperature - Preliminary results

Details Experimental deformation of polycrystalline H2O ice at high pressure and low temperature - Preliminary results Experimental deformation of polycrystalline H2O ice at high pressure and low temperature - Preliminary results

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lpsc...14..377d&link_type=abstract

(American Geophysical Union and NASA, Lunar and Planetary Science Conference, 14th, Houston, TX, Mar. 14-18, 1983) Journal of Ge

Physics

23

Deformation, High Pressure, Ice, Low Temperature Tests, Mechanical Properties, Polycrystals, Satellite Surfaces, Brittleness, Callisto, Ductility, Ganymede, Gas Giant Planets, Phase Diagrams, Tables (Data), Planets, Laboratory Studies, Experiments, Deformation, Strength, Stress, Pressure, Thermal Effects, Temperature, Mechanical Properties, Equipment, Water Ice, Fracturing, Parameters, Icy Bodies, Ganymede, Jupiter, Petrography, Crystalline Material, Diagrams, Techniques, Morphology, Photographs, Photomicro

Scientific paper

A preliminary study is carried out of involving 70 constant strain deformation tests on pure polycrystalline H2O ice under conditions covering most of the stability field of ice Ih. Brittle failure of Ih is found to be promoted by lower P, lower T, and higher strain rates. Ductile flow is found to be promoted by higher P, higher T, and lower strain rates. The brittle failure of ice Ih is found to be most unusual. The fracture strength is a positive function of P only below 50 MPa. At pressures greater than this, the fracture strength is independent of P, and the fracture plane lies approximately 45 deg from the load axis. It is believed that existing extrapolation based on existing experimental data to Ganymede and Callisto may be badly in error.

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