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Inelastic properties of ice Ih at low temperatures and high pressures

Journal de Physique Colloques

By:
, , , , and
DOI:10.1051/jphyscol:1987131

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Abstract

The aim of our research programme is to explore the rheological behavior of H2O 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 > 30 MPa, ice Ih 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:
Article
Publication Subtype:
Journal Article
Title:
Inelastic properties of ice Ih at low temperatures and high pressures
Series title:
Journal de Physique Colloques
ISBN:
286883051X
DOI:
10.1051/jphyscol:1987131
Volume:
48
Issue:
3
Year Published:
1987
Language:
English
Publisher:
Les Editions de physique
Description:
6 p.
First page:
227
Last page:
232
Conference Title:
VIIth Symposium on the Physics and Chemistry of Ice.
Online Only (Y/N):
N
Additional Online Files (Y/N):
N