Accession Number:

ADA045246

Title:

Compressive and Shear Strengths of Fragmented Ice Covers-a Laboratory Study.

Descriptive Note:

Master's thesis,

Corporate Author:

IOWA INST OF HYDRAULIC RESEARCH IOWA CITY

Personal Author(s):

Report Date:

1977-08-01

Pagination or Media Count:

96.0

Abstract:

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 ftsec, 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 andor water temperatures can have a large effect on sigma cr, and sigma crt, probably due to their affecting the formation of cohesive bonds between the ice particles within the ice covers. Author

Subject Categories:

  • Snow, Ice and Permafrost
  • Civil Engineering
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE