Strain Rate Effect on the Strength of Frozen Silt.

Uniaxial compression and tension tests were conducted on frozen Fairbanks silt at a temperature of -10 C. A relatively stiff testing machine was operated at a constant displacement rate for each test. The tests showed that compressive strength is very sensitive to strain rate and the tensile strengt...

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Bibliographic Details
Main Authors: Haynes,F. D., Karalius,J. A., Kalafut,J.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1975
Subjects:
Soil Mechanics
Snow
Ice and Permafrost
*SOIL MECHANICS
*STRAIN RATE
*SILT
TENSILE STRENGTH
DISPLACEMENT
ALASKA
STRENGTH(MECHANICS)
FREEZING
FAILURE(MECHANICS)
EXCAVATION
TENSILE TESTERS
COMPRESSIVE PROPERTIES
PERMAFROST
*Frozen soils
Compressive strength
Tangent modulus
Fairbanks
Ice
permafrost
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADA021981
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA021981
Description
Summary:Uniaxial compression and tension tests were conducted on frozen Fairbanks silt at a temperature of -10 C. A relatively stiff testing machine was operated at a constant displacement rate for each test. The tests showed that compressive strength is very sensitive to strain rate and the tensile strength is relatively insensitive to it. The compressive strength increased ten times over a srain rate range of .00012/S to 2.9/s. As was found in other investigations, tangent moduli increased slightly with greater strain rates. The specific eney increased at higher strain rates for compression tests and decreased slightly for tension tests. For increased strain rates, uniaxial compression strength showed no tendency to plateua; nor did the specific energy a minimum during uniaxial tensile testing. (Author)

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