Mechanical strength of polycrystalline ice under uniaxial compression

1997 ◽  
Vol 26 (3) ◽  
pp. 215-229 ◽  
Author(s):  
Masahiko Arakawa ◽  
Norikazu Maeno
Keyword(s):  
Mechanical Strength ◽  
Uniaxial Compression ◽  
Polycrystalline Ice

scholarly journals Does the Permanent Creep-Rate of Polycrystalline Ice Increase with Crystal Size?

1980 ◽  
Vol 25 (91) ◽  
pp. 151-158 ◽  
Author(s):  
Paul Duval ◽  
Hugues Le Gac
Keyword(s):  
Grain Size ◽  
Creep Rate ◽  
Uniaxial Compression ◽  
Crystal Size ◽  
Size Range ◽  
Transient Creep ◽  
Creep Tests ◽  
Compression Creep ◽  
Polycrystalline Ice

AbstractUniaxial compression creep tests were performed on artificial and natural polycrystalline ices at temperatures near –7°C. The grain-size range investigated was from 1 to 10 mm. Contrary to previous results, the permanent creep-rate was not found to increase with crystal size. Only the transient creep appears to be sensitive to variations in crystal size.

A STUDY OF CRACKS IN POLYCRYSTALLINE ICE UNDER UNIAXIAL COMPRESSION

1987 ◽  
Vol 48 (C1) ◽  
pp. C1-303-C1-311 ◽  
Author(s):  
S. D. HALLAM ◽  
P. DUVAL ◽  
M. F. ASHBY
Keyword(s):  
Uniaxial Compression ◽  
Polycrystalline Ice

scholarly journals Modelling evolution of anisotropy in fabric and texture of polar ice

2002 ◽  
Vol 35 ◽  
pp. 545-551 ◽  
Author(s):  
Sérgio H. Faria ◽  
Dimitri Ktitarev ◽  
Kolumban Hutter
Keyword(s):  
Cellular Automaton ◽  
Uniaxial Compression ◽  
Reasonable Agreement ◽  
Texture Evolution ◽  
Numerical Results ◽  
Simulation Tool ◽  
Impurity Effects ◽  
Polar Ice ◽  
Polycrystalline Ice

AbstractWe present a simulation tool, based on a cellular automaton algorithm developed by D. Ktitarev and others, for the modelling of fabric and texture evolution in polycrystalline ice. the numerical results for the case of vertical uniaxial compression are compared with data obtained from boreholes GRIP–GISP2 in Greenland. A reasonable agreement is obtained, and guidelines are presented for further formulation of more realistic simulations. In particular, we discuss the rise of girdle-type fabrics, as well as the importance of intra- and intercrystalline stresses, temperature and impurity effects on the evolving ice microstructure.

scholarly journals Transient creep of polycrystalline ice under uniaxial compression: an assessment of internal state variable models

1994 ◽  
Vol 19 ◽  
pp. 55-62 ◽  
Author(s):  
J. Meyssonnier ◽  
A. Goubert
Keyword(s):  
Uniaxial Compression ◽  
Internal State ◽  
Primary Creep ◽  
Isotropic Hardening ◽  
Compression Tests ◽  
Rheological Models ◽  
Transient Behaviour ◽  
Damage Models ◽  
Polycrystalline Ice ◽  
Deformation Processes

The efforts to develop damage models for ice cannot be disconnected from a better knowledge of the undamaged ice behaviour. In this respect the transient behaviour of polycrystalline ice still needs to be investigated. The present paper is a contribution to the development of rheological models which can be used in varying load situations. The deformation processes which should be the foundation of the models are described. The models of Le Gac and Duval (1980) and of Sunder and Wu (1989a) are tested against two uniaxial compression tests on isotropic granular ice under varying load. They fail to describe both primary creep and the response to increments/decrements of the applied load. A new model, based on a decomposition of the viscoplastic strain into two components which account separately for kinematic and isotropic hardening, is shown to give better results.

scholarly journals Transient creep of polycrystalline ice under uniaxial compression: an assessment of internal state variable models

1994 ◽  
Vol 19 ◽  
pp. 55-62 ◽  
Author(s):  
J. Meyssonnier ◽  
A. Goubert
Keyword(s):  
Uniaxial Compression ◽  
Internal State ◽  
Primary Creep ◽  
Isotropic Hardening ◽  
Compression Tests ◽  
Rheological Models ◽  
Transient Behaviour ◽  
Damage Models ◽  
Polycrystalline Ice ◽  
Deformation Processes

The efforts to develop damage models for ice cannot be disconnected from a better knowledge of the undamaged ice behaviour. In this respect the transient behaviour of polycrystalline ice still needs to be investigated. The present paper is a contribution to the development of rheological models which can be used in varying load situations. The deformation processes which should be the foundation of the models are described. The models of Le Gac and Duval (1980) and of Sunder and Wu (1989a) are tested against two uniaxial compression tests on isotropic granular ice under varying load. They fail to describe both primary creep and the response to increments/decrements of the applied load. A new model, based on a decomposition of the viscoplastic strain into two components which account separately for kinematic and isotropic hardening, is shown to give better results.

scholarly journals Does the Permanent Creep-Rate of Polycrystalline Ice Increase with Crystal Size?

1980 ◽  
Vol 25 (91) ◽  
pp. 151-158 ◽  
Author(s):  
Paul Duval ◽  
Hugues Le Gac
Keyword(s):  
Grain Size ◽  
Creep Rate ◽  
Uniaxial Compression ◽  
Crystal Size ◽  
Size Range ◽  
Transient Creep ◽  
Creep Tests ◽  
Compression Creep ◽  
Polycrystalline Ice

AbstractUniaxial compression creep tests were performed on artificial and natural polycrystalline ices at temperatures near –7°C. The grain-size range investigated was from 1 to 10 mm. Contrary to previous results, the permanent creep-rate was not found to increase with crystal size. Only the transient creep appears to be sensitive to variations in crystal size.

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