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INELASTIC PROPERTIES OF ICE I//h AT LOW TEMPERATURES AND HIGH PRESSURES.

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, , , , and

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Abstract

The aim of our research programme is to explore the rheological behavior of H//2O ices under conditions appropriate to the interiors of the icy satellites of the outer planets in order to give insight into their deformation. To this end, we have performed over 100 constant-strain-rate compression tests at pressures to 500 MPa and temperatures as low as 77 K. At P greater than 30 MPa, ice I//h fails by a shear instability producing faults in the maximum shear stress orientation and failure strength typically is independent of pressure. This unusual faulting behavior is thought to be connected with phase transformations localized in the shear zones. The steady-state strength follows rheological laws of the thermally-activated power-law type, with different flow law parameters depending on the range of test temperatures. The flow laws will be discussed with reference to the operating deformation mechanisms as deduced from optical-scale microstructures and comparison with other work.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
INELASTIC PROPERTIES OF ICE I//h AT LOW TEMPERATURES AND HIGH PRESSURES.
ISBN:
286883051X
Volume
48
Issue:
3
Year Published:
1987
Language:
English
Larger Work Title:
Journal de Physique (Paris), Colloque
First page:
227
Last page:
232
Conference Title:
VIIth Symposium on the Physics and Chemistry of Ice.
Conference Location:
Grenoble, Fr