Accession Number : AD0880269

Title :   Influence of Load Path and State of Stress on Failure Strength and Stress-Strain Properties of Rocks.

Descriptive Note : Technical rept. Oct 68-May 70,

Corporate Author : UTAH UNIV SALT LAKE CITY

Personal Author(s) : Brown,Wayne S. ; Swanson,Stephen R.

Report Date : JAN 1971

Pagination or Media Count : 91

Abstract : Valid constitutive relations for rock are required to enable accurate calculation of shock wave propagation and ground motion in the earth. Experiments have been performed on Cedar City tonalite to determine the stress-strain properties under a variety of loading paths. A servo-controlled triaxial test apparatus, which permits the axial and radial stresses to be varied in a pre-programmed manner, was utilized in the test program. Tests were performed using hydrostatic, uniaxial strain, constant confining pressure and constant stress ratio (proportional loading) load paths. Axial and radial stresses and strains were recorded during the test. It was found that the stress-strain behavior of this material is dependent only on the magnitude of the stress. Complete stress-strain curves are reported for single and cyclically loaded specimens. (Author)

Descriptors :   (*ROCK, SHEAR STRESSES), (*NUCLEAR EXPLOSIONS, ROCK), SHOCK WAVES, SIMULATION, QUARTZ, MICA, STRAIN(MECHANICS), PRESSURE, LOADS(FORCES), TERRAIN, MOTION, FAILURE(MECHANICS), METAMORPHIC ROCK, GRANITE, SANDSTONE, EXPLOSION EFFECTS

Subject Categories : Geology, Geochemistry and Mineralogy
      Soil Mechanics
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE