Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study.
The results of an experimental study on the compressive and shear strengths of floating, fragmented ice covers are presented. The compressive strength of prestrained covers and of covers submitted to an approximately constant preload was found to be essentially equal to that of unstrained, non-prelo...
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ftdtic:ADA045246 2023-05-15T16:37:12+02:00 Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. Cheng,S T Tatinclaux,J C IOWA INST OF HYDRAULIC RESEARCH IOWA CITY 1977-08 text/html http://www.dtic.mil/docs/citations/ADA045246 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA045246 en eng http://www.dtic.mil/docs/citations/ADA045246 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Snow Ice and Permafrost Civil Engineering Mechanics *ICE TEMPERATURE THICKNESS STRESS ANALYSIS WATER LOADS(FORCES) ATMOSPHERIC TEMPERATURE THESES POROSITY STRENGTH(MECHANICS) MODEL TESTS RIVERS AIR WATER INTERACTIONS FRAGMENTS COMPRESSIVE PROPERTIES COHESION FLOATING BODIES SHEAR STRENGTH *Ice jams Ice cover River ice Text 1977 ftdtic 2016-02-20T14:24:01Z The results of an experimental study on the compressive and shear strengths of floating, fragmented ice covers are presented. The compressive strength of prestrained covers and of covers submitted to an approximately constant preload was found to be essentially equal to that of unstrained, non-preloaded covers. The compressive strength (sigma cr) became independent of the velocity (Vc) at which the load was applied when Vc became greater than 0.01 ft/sec, and for Vc 0.01 the ratio of strength to cover thickness (t) and the shear strength (tau) became, approximately constant independent of both vc and t. Differences observed between the present study and that of a previous similar investigation led to the conclusion that small variations in the air and/or water temperatures can have a large effect on sigma cr, and sigma cr/t, probably due to their affecting the formation of cohesive bonds between the ice particles within the ice covers. (Author) Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost Civil Engineering Mechanics *ICE TEMPERATURE THICKNESS STRESS ANALYSIS WATER LOADS(FORCES) ATMOSPHERIC TEMPERATURE THESES POROSITY STRENGTH(MECHANICS) MODEL TESTS RIVERS AIR WATER INTERACTIONS FRAGMENTS COMPRESSIVE PROPERTIES COHESION FLOATING BODIES SHEAR STRENGTH *Ice jams Ice cover River ice |
spellingShingle |
Snow Ice and Permafrost Civil Engineering Mechanics *ICE TEMPERATURE THICKNESS STRESS ANALYSIS WATER LOADS(FORCES) ATMOSPHERIC TEMPERATURE THESES POROSITY STRENGTH(MECHANICS) MODEL TESTS RIVERS AIR WATER INTERACTIONS FRAGMENTS COMPRESSIVE PROPERTIES COHESION FLOATING BODIES SHEAR STRENGTH *Ice jams Ice cover River ice Cheng,S T Tatinclaux,J C Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. |
topic_facet |
Snow Ice and Permafrost Civil Engineering Mechanics *ICE TEMPERATURE THICKNESS STRESS ANALYSIS WATER LOADS(FORCES) ATMOSPHERIC TEMPERATURE THESES POROSITY STRENGTH(MECHANICS) MODEL TESTS RIVERS AIR WATER INTERACTIONS FRAGMENTS COMPRESSIVE PROPERTIES COHESION FLOATING BODIES SHEAR STRENGTH *Ice jams Ice cover River ice |
description |
The results of an experimental study on the compressive and shear strengths of floating, fragmented ice covers are presented. The compressive strength of prestrained covers and of covers submitted to an approximately constant preload was found to be essentially equal to that of unstrained, non-preloaded covers. The compressive strength (sigma cr) became independent of the velocity (Vc) at which the load was applied when Vc became greater than 0.01 ft/sec, and for Vc 0.01 the ratio of strength to cover thickness (t) and the shear strength (tau) became, approximately constant independent of both vc and t. Differences observed between the present study and that of a previous similar investigation led to the conclusion that small variations in the air and/or water temperatures can have a large effect on sigma cr, and sigma cr/t, probably due to their affecting the formation of cohesive bonds between the ice particles within the ice covers. (Author) |
author2 |
IOWA INST OF HYDRAULIC RESEARCH IOWA CITY |
format |
Text |
author |
Cheng,S T Tatinclaux,J C |
author_facet |
Cheng,S T Tatinclaux,J C |
author_sort |
Cheng,S T |
title |
Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. |
title_short |
Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. |
title_full |
Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. |
title_fullStr |
Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. |
title_full_unstemmed |
Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study. |
title_sort |
compressive and shear strengths of fragmented ice covers-a laboratory study. |
publishDate |
1977 |
url |
http://www.dtic.mil/docs/citations/ADA045246 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA045246 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA045246 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766027497950937088 |