Strength Tests on Newly Fallen Snow
Abstract Modified versions of in situ strength tests previously applied to metamorphosed snow were developed to measure the mechanical properties of newly fallen snow during storm periods. A large drop-cone penetrometer, protected from the wind by an aluminum shell, was used to determine snow “hardn...
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Language: | English |
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Cambridge University Press (CUP)
1969
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Online Access: | http://dx.doi.org/10.1017/s0022143000027015 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000027015 |
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crcambridgeupr:10.1017/s0022143000027015 2024-06-23T07:54:14+00:00 Strength Tests on Newly Fallen Snow Perla, R. 1969 http://dx.doi.org/10.1017/s0022143000027015 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000027015 en eng Cambridge University Press (CUP) Journal of Glaciology volume 8, issue 54, page 427-440 ISSN 0022-1430 1727-5652 journal-article 1969 crcambridgeupr https://doi.org/10.1017/s0022143000027015 2024-06-12T04:04:40Z Abstract Modified versions of in situ strength tests previously applied to metamorphosed snow were developed to measure the mechanical properties of newly fallen snow during storm periods. A large drop-cone penetrometer, protected from the wind by an aluminum shell, was used to determine snow “hardness”. A lightweight model of the Haefeli ram penetrometer measured “ram numbers”. Shear strengths were obtained from large, light-weight frames. Some preliminary tests were made with a shear vane driven by a torque wrench. A new technique was devised for measuring tensile strength whereby a cantilever beam of snow is undercut until it fails under its own weight. Comparisons between the cantilever test and the shear-frame test show high ratios for tensile to shear strength. Cantilever strength plotted against density shows an order of magnitude variation in strength at all densities. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 8 54 427 440 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Modified versions of in situ strength tests previously applied to metamorphosed snow were developed to measure the mechanical properties of newly fallen snow during storm periods. A large drop-cone penetrometer, protected from the wind by an aluminum shell, was used to determine snow “hardness”. A lightweight model of the Haefeli ram penetrometer measured “ram numbers”. Shear strengths were obtained from large, light-weight frames. Some preliminary tests were made with a shear vane driven by a torque wrench. A new technique was devised for measuring tensile strength whereby a cantilever beam of snow is undercut until it fails under its own weight. Comparisons between the cantilever test and the shear-frame test show high ratios for tensile to shear strength. Cantilever strength plotted against density shows an order of magnitude variation in strength at all densities. |
format |
Article in Journal/Newspaper |
author |
Perla, R. |
spellingShingle |
Perla, R. Strength Tests on Newly Fallen Snow |
author_facet |
Perla, R. |
author_sort |
Perla, R. |
title |
Strength Tests on Newly Fallen Snow |
title_short |
Strength Tests on Newly Fallen Snow |
title_full |
Strength Tests on Newly Fallen Snow |
title_fullStr |
Strength Tests on Newly Fallen Snow |
title_full_unstemmed |
Strength Tests on Newly Fallen Snow |
title_sort |
strength tests on newly fallen snow |
publisher |
Cambridge University Press (CUP) |
publishDate |
1969 |
url |
http://dx.doi.org/10.1017/s0022143000027015 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000027015 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 8, issue 54, page 427-440 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000027015 |
container_title |
Journal of Glaciology |
container_volume |
8 |
container_issue |
54 |
container_start_page |
427 |
op_container_end_page |
440 |
_version_ |
1802646321322000384 |