Creep and Yield Model of Ice under Combined Stress
Constitutive equations and strength criteria have been developed for ice in a multiaxial stress state. The equations developed describe the entire creep process, including primary, secondary, and tertiary creep, at both constant stresses and constant strain rates in terms of normalized (dimensionles...
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1991
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ftdtic:ADA249788 2023-05-15T16:37:13+02:00 Creep and Yield Model of Ice under Combined Stress Fish, Anatoly M. COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH 1991-12 text/html http://www.dtic.mil/docs/citations/ADA249788 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA249788 en eng http://www.dtic.mil/docs/citations/ADA249788 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost *CREEP *YIELD STRENGTH *ICE MECHANICS MODELS SECONDARY RATES RUPTURE STRENGTH(MECHANICS) STRAIN RATE TIME ICE CONSTANTS MELTING YIELD POWER VALUE MEAN EQUATIONS FAILURE(MECHANICS) POLYCRYSTALLINE SHEAR STRENGTH STRESSES TRIAXIAL STRESSES TEST AND EVALUATION COMPRESSION PE62784A Text 1991 ftdtic 2016-02-22T15:24:35Z Constitutive equations and strength criteria have been developed for ice in a multiaxial stress state. The equations developed describe the entire creep process, including primary, secondary, and tertiary creep, at both constant stresses and constant strain rates in terms of normalized (dimensionless) time. Secondary creep is considered an inflection point defining the time to failure (tm). The minimum strain rate at failure is described by a modified Norton-Glen power equation, which, as well as the time to failure, includes a parabolic yield criterion. The yield criterion is selected either in the form of an extended von Mises-Drucker-Prager or an extended Mohr-Coulomb rupture model. The criteria take into account that at a certain magnitude of mean normal stresses the shear strength of ice reaches a maximum value due to local melting of ice. The model has been verified using test data on the yield of polycrystalline ice at -1 1.8 degC and on creep of saline ice at -5 degC, both under triaxial compression. Creep Ice Strength Failure Model Yield Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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ftdtic |
language |
English |
topic |
Snow Ice and Permafrost *CREEP *YIELD STRENGTH *ICE MECHANICS MODELS SECONDARY RATES RUPTURE STRENGTH(MECHANICS) STRAIN RATE TIME ICE CONSTANTS MELTING YIELD POWER VALUE MEAN EQUATIONS FAILURE(MECHANICS) POLYCRYSTALLINE SHEAR STRENGTH STRESSES TRIAXIAL STRESSES TEST AND EVALUATION COMPRESSION PE62784A |
spellingShingle |
Snow Ice and Permafrost *CREEP *YIELD STRENGTH *ICE MECHANICS MODELS SECONDARY RATES RUPTURE STRENGTH(MECHANICS) STRAIN RATE TIME ICE CONSTANTS MELTING YIELD POWER VALUE MEAN EQUATIONS FAILURE(MECHANICS) POLYCRYSTALLINE SHEAR STRENGTH STRESSES TRIAXIAL STRESSES TEST AND EVALUATION COMPRESSION PE62784A Fish, Anatoly M. Creep and Yield Model of Ice under Combined Stress |
topic_facet |
Snow Ice and Permafrost *CREEP *YIELD STRENGTH *ICE MECHANICS MODELS SECONDARY RATES RUPTURE STRENGTH(MECHANICS) STRAIN RATE TIME ICE CONSTANTS MELTING YIELD POWER VALUE MEAN EQUATIONS FAILURE(MECHANICS) POLYCRYSTALLINE SHEAR STRENGTH STRESSES TRIAXIAL STRESSES TEST AND EVALUATION COMPRESSION PE62784A |
description |
Constitutive equations and strength criteria have been developed for ice in a multiaxial stress state. The equations developed describe the entire creep process, including primary, secondary, and tertiary creep, at both constant stresses and constant strain rates in terms of normalized (dimensionless) time. Secondary creep is considered an inflection point defining the time to failure (tm). The minimum strain rate at failure is described by a modified Norton-Glen power equation, which, as well as the time to failure, includes a parabolic yield criterion. The yield criterion is selected either in the form of an extended von Mises-Drucker-Prager or an extended Mohr-Coulomb rupture model. The criteria take into account that at a certain magnitude of mean normal stresses the shear strength of ice reaches a maximum value due to local melting of ice. The model has been verified using test data on the yield of polycrystalline ice at -1 1.8 degC and on creep of saline ice at -5 degC, both under triaxial compression. Creep Ice Strength Failure Model Yield |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH |
format |
Text |
author |
Fish, Anatoly M. |
author_facet |
Fish, Anatoly M. |
author_sort |
Fish, Anatoly M. |
title |
Creep and Yield Model of Ice under Combined Stress |
title_short |
Creep and Yield Model of Ice under Combined Stress |
title_full |
Creep and Yield Model of Ice under Combined Stress |
title_fullStr |
Creep and Yield Model of Ice under Combined Stress |
title_full_unstemmed |
Creep and Yield Model of Ice under Combined Stress |
title_sort |
creep and yield model of ice under combined stress |
publishDate |
1991 |
url |
http://www.dtic.mil/docs/citations/ADA249788 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA249788 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA249788 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766027518569086976 |