Effect of Temperature on the Strength of Frozen Silt
| Author | : F. Donald Haynes |
| Publisher | : |
| Total Pages | : 40 |
| Release | : 1977 |
| Genre | : Frozen ground |
| ISBN | : |
Effect Of Temperature On The Strength Of Frozen Silt
Download Effect Of Temperature On The Strength Of Frozen Silt full books in PDF, epub, and Kindle. Read online free Effect Of Temperature On The Strength Of Frozen Silt ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Effect of Temperature on the Strength of Frozen Silt
| Author | : F. Donald Haynes |
| Publisher | : |
| Total Pages | : 27 |
| Release | : 1977 |
| Genre | : Soils |
| ISBN | : |
Tests were conducted in uniaxial compression and tension to determine the effect of temperature on the strength of frozen Fairbanks silt. Test temperatures ranged from 0 C to -56.7 C. Two machine speeds, 4.23 cm/sec and 0.0423 cm/sec, were used for the constant displacement rate tests. From the highest to the lowest temperature, the compressive strength increased up to about one order of magnitude and the tensile strength increased one-half an order of magnitude. Equations are presented which correlate strength with temperature at the strain rates obtained. The initial tangent and 50% strength moduli and the specific energy are given for each test. The mode of fracture and the effects of unfrozen water content and ice matrix strengthening are discussed, and the test results are compared with the data of other investigations. (Author).
Strain Rate Effect on the Strength of Frozen Silt
| Author | : F. Donald Haynes |
| Publisher | : |
| Total Pages | : 36 |
| Release | : 1975 |
| Genre | : Silt |
| ISBN | : |
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).
Tensile Strength of Frozen Silt
| Author | : Zhu Yuanlin |
| Publisher | : |
| Total Pages | : 40 |
| Release | : 1987 |
| Genre | : Frozen ground |
| ISBN | : |
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 peak tensile strength decreases considerable 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. Keywords: Frozen mechanics, Frozen soil, Silt, Soil, Strain, Strength.
Strain Rate Effect on the Strength of Frozen Silt
| Author | : F. Donald Haynes |
| Publisher | : |
| Total Pages | : 27 |
| Release | : 1975 |
| Genre | : Silt |
| ISBN | : |
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).
Technical Report
| Author | : Cold Regions Research and Engineering Laboratory (U.S.) |
| Publisher | : |
| Total Pages | : 682 |
| Release | : 1951 |
| Genre | : Frozen ground |
| ISBN | : |
Creep and Strength Behavior of Frozen Silt in Uniaxial Compression
| Author | : Zhu Yuanlin |
| Publisher | : |
| Total Pages | : 84 |
| Release | : 1987 |
| Genre | : Frozen ground |
| ISBN | : |
Uniaxial constant-stress and constant-strain-rate compression tests were conducted on more than 200 remolded, saturated, frozen specimens of rates show a close strength correspondence between the constant-stress and constant-strain-rate tests. All of these complete stress vs strain rate curves could not be described by a single power law or exponential equation, indicating that different deformation mechanisms are dominant within different ranges of strain rate.
Creep of Frozen Silt and Clay
| Author | : Francis H. Sayles |
| Publisher | : |
| Total Pages | : 60 |
| Release | : 1974 |
| Genre | : Clay |
| ISBN | : |
Unconfined compressive creep strengths and strains were measured for remolded saturated frozen Hanover silt and Suffield clay. The creep tests were conducted at the approximate stress levels of 60, 35, 20 and 5% of the conventional unconfined compressive strength. Testing temperatures were 15, 25, 29 and 31F ( -9.45, -3.89, -1.67 and -0.56C). It was found that the variation of unconfined compression peak strength with temperature can be represented by Sigma sub p = Alpha(Theta/Theta sub 0) to the (0.5) power. Unconfined compression creep strength can be estimated by Vialov's strength equation. Long-term creep strength is less than 45% of unconfined compression strength and can be as low as 10% of this strength. (Modified author abstract).
