PENETRATION OF PLATES IN DENSE SNOW.
As part of a program of snow studies in Greenland, instrumented struts were placed in rooms excavated below the surface of the ice cap. Closure rates were measured in the undersnow cavities, and strut loads developed by snow pressure on the circular end plates were recorded. The strut installations...
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ftdtic:AD0617617 2023-05-15T16:29:42+02:00 PENETRATION OF PLATES IN DENSE SNOW. Mellor,Malcolm ramseier,Rene O. COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H 1965-05 text/html http://www.dtic.mil/docs/citations/AD0617617 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0617617 en eng http://www.dtic.mil/docs/citations/AD0617617 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS (*SNOW FOUNDATIONS(STRUCTURES)) (*FOUNDATIONS(STRUCTURES) SNOW) MECHANICAL PROPERTIES SCIENTIFIC RESEARCH THEORY MATHEMATICAL ANALYSIS VISCOELASTICITY ELASTIC PROPERTIES METAL PLATES PENETRATION DEFORMATION LOADS(FORCES) STRESSES SHEAR STRESSES STRUCTURAL ANALYSIS STRENGTH(PHYSIOLOGY) POLAR REGIONS Text 1965 ftdtic 2016-02-18T18:25:20Z As part of a program of snow studies in Greenland, instrumented struts were placed in rooms excavated below the surface of the ice cap. Closure rates were measured in the undersnow cavities, and strut loads developed by snow pressure on the circular end plates were recorded. The strut installations are described and the data are interpreted in terms of Kerr's viscous foundation theory. Emphasis is placed on the penetration of a circular rigid plate, the evaluation of the viscosity coefficients, comments on the values of the parameters for a given material, shear viscosity, and thickness in the Kerr model, and the effect of plate size on penetration rate. It is tentatively concluded that (1) until a suitable treatment for the viscoelastic continuum becomes available, the Kerr model offers a rational approach to problems of foundations in snow and to certain problems involving pressures on undersnow structures, (2) the viscosity coefficients of the model are not in themselves characteristic constants for a given snow, (3) as a consequence of (2), the viscosity coefficients may not be evaluated by comparing data for plates of widely differing sizes, and (4) if the thickness coefficient were found to be independent of plate size, as seems possible, it would become a valuable index for determining size effect. (Author) Text Greenland Ice cap Defense Technical Information Center: DTIC Technical Reports database Greenland Kerr ENVELOPE(65.633,65.633,-70.433,-70.433) |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
(*SNOW FOUNDATIONS(STRUCTURES)) (*FOUNDATIONS(STRUCTURES) SNOW) MECHANICAL PROPERTIES SCIENTIFIC RESEARCH THEORY MATHEMATICAL ANALYSIS VISCOELASTICITY ELASTIC PROPERTIES METAL PLATES PENETRATION DEFORMATION LOADS(FORCES) STRESSES SHEAR STRESSES STRUCTURAL ANALYSIS STRENGTH(PHYSIOLOGY) POLAR REGIONS |
spellingShingle |
(*SNOW FOUNDATIONS(STRUCTURES)) (*FOUNDATIONS(STRUCTURES) SNOW) MECHANICAL PROPERTIES SCIENTIFIC RESEARCH THEORY MATHEMATICAL ANALYSIS VISCOELASTICITY ELASTIC PROPERTIES METAL PLATES PENETRATION DEFORMATION LOADS(FORCES) STRESSES SHEAR STRESSES STRUCTURAL ANALYSIS STRENGTH(PHYSIOLOGY) POLAR REGIONS Mellor,Malcolm ramseier,Rene O. PENETRATION OF PLATES IN DENSE SNOW. |
topic_facet |
(*SNOW FOUNDATIONS(STRUCTURES)) (*FOUNDATIONS(STRUCTURES) SNOW) MECHANICAL PROPERTIES SCIENTIFIC RESEARCH THEORY MATHEMATICAL ANALYSIS VISCOELASTICITY ELASTIC PROPERTIES METAL PLATES PENETRATION DEFORMATION LOADS(FORCES) STRESSES SHEAR STRESSES STRUCTURAL ANALYSIS STRENGTH(PHYSIOLOGY) POLAR REGIONS |
description |
As part of a program of snow studies in Greenland, instrumented struts were placed in rooms excavated below the surface of the ice cap. Closure rates were measured in the undersnow cavities, and strut loads developed by snow pressure on the circular end plates were recorded. The strut installations are described and the data are interpreted in terms of Kerr's viscous foundation theory. Emphasis is placed on the penetration of a circular rigid plate, the evaluation of the viscosity coefficients, comments on the values of the parameters for a given material, shear viscosity, and thickness in the Kerr model, and the effect of plate size on penetration rate. It is tentatively concluded that (1) until a suitable treatment for the viscoelastic continuum becomes available, the Kerr model offers a rational approach to problems of foundations in snow and to certain problems involving pressures on undersnow structures, (2) the viscosity coefficients of the model are not in themselves characteristic constants for a given snow, (3) as a consequence of (2), the viscosity coefficients may not be evaluated by comparing data for plates of widely differing sizes, and (4) if the thickness coefficient were found to be independent of plate size, as seems possible, it would become a valuable index for determining size effect. (Author) |
author2 |
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H |
format |
Text |
author |
Mellor,Malcolm ramseier,Rene O. |
author_facet |
Mellor,Malcolm ramseier,Rene O. |
author_sort |
Mellor,Malcolm |
title |
PENETRATION OF PLATES IN DENSE SNOW. |
title_short |
PENETRATION OF PLATES IN DENSE SNOW. |
title_full |
PENETRATION OF PLATES IN DENSE SNOW. |
title_fullStr |
PENETRATION OF PLATES IN DENSE SNOW. |
title_full_unstemmed |
PENETRATION OF PLATES IN DENSE SNOW. |
title_sort |
penetration of plates in dense snow. |
publishDate |
1965 |
url |
http://www.dtic.mil/docs/citations/AD0617617 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0617617 |
long_lat |
ENVELOPE(65.633,65.633,-70.433,-70.433) |
geographic |
Greenland Kerr |
geographic_facet |
Greenland Kerr |
genre |
Greenland Ice cap |
genre_facet |
Greenland Ice cap |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/AD0617617 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766019409108795392 |