Stress wave propagation in rock

Conference · Sat Jan 01 00:00:00 EST 1977

OSTI ID:7316435

Grady, D E

Earth penetration, design and hardening of structures to explosive or earthquake-induced ground shock effects, rapid excavation, and in situ preparation of coal, shale, or geothermal deposits are representative problems in which accurate constitutive descriptions of the geological medium are required to provide meaningful predictions. The rock or rock masses involved undergo complex, finite amplitude deformation during the process of transient dynamic loading, and quasi-static experimental compression techniques are normally used to provide much of the necessary data base. Strain rates typically range between 10/sup 1//s and 10/sup 5//s in the problems of interest, however, and further studies are required to determine the importance of rate dependence in the mechanical constitutive behavior of rock. Material response at the higher strain rates can be investigated with impact generated stress waves where controlled strain rates between about 10/sup 4//s to 10/sup 7//s can be achieved. Experimental methods have been developed to conduct and analyze impact-induced shock wave, ramp wave, and tensile fracture studies. Experimental results on some select crustal silicate and carbonate rocks show that strain rate dependence and the processes of phase transformation, compressive yielding, and fracture are important features in the dynamic constitutive response.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 7316435
• Report Number(s): SAND-77-0083C; CONF-770706-3
• Resource Relation: Conference: 6. AIRAPT international high-pressure conference, Boulder, CO, USA, 25 Jul 1977
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
15 GEOTHERMAL ENERGY
ROCKS
MECHANICAL PROPERTIES
STRESSES
CARBONATES
ELASTICITY
MEASURING METHODS
PHASE TRANSFORMATIONS
ROCK MECHANICS
SILICATES
STRAIN RATE
TENSILE PROPERTIES
WAVE PROPAGATION
CARBON COMPOUNDS
OXYGEN COMPOUNDS
SILICON COMPOUNDS
Geothermal Legacy
580300* - Mineralogy
Petrology
& Rock Mechanics- (-1989)
152002 - Geothermal Data & Theory- Properties of Minerals & Rocks