The Creep of Frozen Sands: Qualitative and Quantitative Models.
This Report developes better qualitative and quantitative models for the time-dependent mechanical behavior of frozen soils. By drawing upon an extensive literature survey, unconfined creep data for frozen sand, and a series of creep tests on glass beads made wetting and nonwetting, various physical...
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ftdtic:ADA097668 2023-05-15T16:37:36+02:00 The Creep of Frozen Sands: Qualitative and Quantitative Models. Ting,John M MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CIVIL ENGINEERING 1981-03 text/html http://www.dtic.mil/docs/citations/ADA097668 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA097668 en eng http://www.dtic.mil/docs/citations/ADA097668 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Soil Mechanics Snow Ice and Permafrost Mechanics *SOIL MECHANICS MATHEMATICAL MODELS DEFORMATION SAND STRAIN(MECHANICS) STRENGTH(MECHANICS) SOILS FREEZING ICE CREEP *Frozen soils Frozen sand Text 1981 ftdtic 2016-02-20T19:41:32Z This Report developes better qualitative and quantitative models for the time-dependent mechanical behavior of frozen soils. By drawing upon an extensive literature survey, unconfined creep data for frozen sand, and a series of creep tests on glass beads made wetting and nonwetting, various physical mechanisms controlling the behavior of frozen soil and proposed: ice strength, soil strength, and mechanical interaction through structural hindrance and dilatancy effects. The nature of the linear relationship between the logarithm of the minimum creep rate and the logarithm of the time to minimum observed from creep tests on ice, soil and frozen soil is shown to be due to the existence of an approximately constant strain at the minimum, and the relative insensitivity of this log-log plot to small deviations from a constant value of strain. Two quantitative models for fitting and predicting the minimum strain rate and time to minimum for unconfined creep are developed and evaluated. Each can typically predict the minimum strain rate and time to minimum to within + or - 4 times the actual value using data from only a relatively few tests. New empirical creep models capable of describing the entire creep curve from primary through tertiary are also developed. Through a simple technique for parameter evaluation, the models can yield excellent fits of the data and reliable predictions of the creep behavior. Typically, the model predict the minimum strain rate to within + or - 3 times and the strain at the minimum to within 70% of the actual values. (Author) See also AD-A075 297. 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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language |
English |
topic |
Soil Mechanics Snow Ice and Permafrost Mechanics *SOIL MECHANICS MATHEMATICAL MODELS DEFORMATION SAND STRAIN(MECHANICS) STRENGTH(MECHANICS) SOILS FREEZING ICE CREEP *Frozen soils Frozen sand |
spellingShingle |
Soil Mechanics Snow Ice and Permafrost Mechanics *SOIL MECHANICS MATHEMATICAL MODELS DEFORMATION SAND STRAIN(MECHANICS) STRENGTH(MECHANICS) SOILS FREEZING ICE CREEP *Frozen soils Frozen sand Ting,John M The Creep of Frozen Sands: Qualitative and Quantitative Models. |
topic_facet |
Soil Mechanics Snow Ice and Permafrost Mechanics *SOIL MECHANICS MATHEMATICAL MODELS DEFORMATION SAND STRAIN(MECHANICS) STRENGTH(MECHANICS) SOILS FREEZING ICE CREEP *Frozen soils Frozen sand |
description |
This Report developes better qualitative and quantitative models for the time-dependent mechanical behavior of frozen soils. By drawing upon an extensive literature survey, unconfined creep data for frozen sand, and a series of creep tests on glass beads made wetting and nonwetting, various physical mechanisms controlling the behavior of frozen soil and proposed: ice strength, soil strength, and mechanical interaction through structural hindrance and dilatancy effects. The nature of the linear relationship between the logarithm of the minimum creep rate and the logarithm of the time to minimum observed from creep tests on ice, soil and frozen soil is shown to be due to the existence of an approximately constant strain at the minimum, and the relative insensitivity of this log-log plot to small deviations from a constant value of strain. Two quantitative models for fitting and predicting the minimum strain rate and time to minimum for unconfined creep are developed and evaluated. Each can typically predict the minimum strain rate and time to minimum to within + or - 4 times the actual value using data from only a relatively few tests. New empirical creep models capable of describing the entire creep curve from primary through tertiary are also developed. Through a simple technique for parameter evaluation, the models can yield excellent fits of the data and reliable predictions of the creep behavior. Typically, the model predict the minimum strain rate to within + or - 3 times and the strain at the minimum to within 70% of the actual values. (Author) See also AD-A075 297. |
author2 |
MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CIVIL ENGINEERING |
format |
Text |
author |
Ting,John M |
author_facet |
Ting,John M |
author_sort |
Ting,John M |
title |
The Creep of Frozen Sands: Qualitative and Quantitative Models. |
title_short |
The Creep of Frozen Sands: Qualitative and Quantitative Models. |
title_full |
The Creep of Frozen Sands: Qualitative and Quantitative Models. |
title_fullStr |
The Creep of Frozen Sands: Qualitative and Quantitative Models. |
title_full_unstemmed |
The Creep of Frozen Sands: Qualitative and Quantitative Models. |
title_sort |
creep of frozen sands: qualitative and quantitative models. |
publishDate |
1981 |
url |
http://www.dtic.mil/docs/citations/ADA097668 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA097668 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA097668 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766027889735630848 |