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Title:	Tensile strength of frozen silt
Authors:	Lanzhou Institute of Glaciology and Geocryology Carbee, David L. Yuanlin, Zhu
Keywords:	Frozen mechanics Soil Frozen soil Frozen ground Strain Silt Strength
Publisher:	Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.)
Series/Report no.:	CRREL report ; 87-15.
Description:	CRREL Report Abstract: Constant strain-rate tension tests were conducted on remolded saturated frozen Fairbanks silt at various temperatures, strain rates, and densities. It was found that the critical strain rate of the ductile-brittle transition is not temperature-dependent at temperatures down to -5°C, but varies with density. The transition occurs at a strain rate of 10(-2)/s for medium-density silt and 5x10(-4)/s for low-density silt. The peak tensile strength decreases considerably with decreasing strain rate for ductile failure, but it decreases slightly with increasing strain rate for brittle fracture. The failure strain remains almost constant at temperatures lower than about -2°C, but it varies with density and strain rate at -5°C. The initial tangent modulus is independent of strain rate and increases with decreasing temperature and density. Note: Numbers in brackets ( ) are exponents.
Rights:	Approved for public release; distribution is unlimited.
URI:	http://hdl.handle.net/11681/9033
Appears in Collections:	CRREL Report