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 degrees 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 that tensile strength is relatively insensitive to it. The compressive strength increased ten times over a strain rate range of 1.2 x 10 to the -4 power s to the -1 power to 2.9 s to the -1 power. As was found in other investigations, tangent moduli increased slightly with greater strain rates. The specific energy 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 plateau; nor did the specific energy reach a minimum during uniaxial tensile testing.
Hanover, NH United States 03755-1290
- Haynes, F D
- Karalius, J A
- Kalafut, J
- Publication Date: 1975-12
- Features: Appendices; Figures; References; Tables;
- Pagination: 29 p.
- TRT Terms: Compression; Compression tests; Frozen soils; Silts; Specific energy; Strain (Mechanics); Tensile strength; Tension
- Uncontrolled Terms: Strain rate; Uniaxial compression; Uniaxial tension
- Old TRIS Terms: Compressive strength tests
- Subject Areas: Energy; Geotechnology; Highways;
- Accession Number: 00131803
- Record Type: Publication
- Report/Paper Numbers: N350 Res. Rept.
- Files: TRIS
- Created Date: Jun 5 1976 12:00AM