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...

Full description

Bibliographic Details
Main Authors: Cheng,S T, Tatinclaux,J C
Other Authors: IOWA INST OF HYDRAULIC RESEARCH IOWA CITY
Format: Text
Language:English
Published: 1977
Subjects:
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
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA045246
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA045246
Description
Summary: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)

Similar Items