Micromechanics of failure in brittle geomaterials. Final technical report (for 7/1/1994 - 8/31/2000)
- Department of Geosciences, State University of New York at Stony Brook, Stony Brook, NY (US)
The overall objective was to provide a fundamental understanding of brittle failure processes in porous and compact geomaterials. This information is central to energy-related programs such as oil and gas exploration/production, reservoir engineering, drilling technology, geothermal energy recovery, nuclear waste isolation, and environmental remediation. The effects of key parameters such as grain boundary structure and cementation, damage state, and load path on the deformation and failure model of brittle geomaterials are still largely unknown. The research methodology emphasized the integration of experimental rock mechanical testing, quantitative microscopy, and detailed analysis using fracture mechanics, continuum plasticity theory, and numerical methods. Significant progress was made in elucidating the micromechanics of brittle failure in compact crystalline rocks, as well as high-porosity siliciclastic and carbonate rocks. Substantial effort was expended toward applying a new quantitative three-dimensional imaging technique to geomaterials and for developing enhanced image analysis capabilities. The research is presented under the following topics: technique for imaging the 3-D pore structure of geomaterials; mechanics of compressive failure in sandstone; effect of water on compressive failure of sandstone; micromechanics of compressive failure: observation and model; and the brittle-ductile transition in porous carbonate rocks.
- Research Organization:
- Department of Geosciences, State University of New York at Stony Brook, Stony Brook, NY (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- FG02-94ER14455
- OSTI ID:
- 809810
- Report Number(s):
- DOE/ER/14455--1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
15 GEOTHERMAL ENERGY
36 MATERIALS SCIENCE
58 GEOSCIENCES
BRITTLE-DUCTILE TRANSITIONS
CARBONATE ROCKS
COMPRESSIVE STRENGTH
DEFORMATION
DILATANCY
FAILURES
FRACTURE MECHANICS
GEOTHERMAL ENERGY
GRAIN BOUNDARIES
Geothermal Legacy
IGNEOUS ROCKS
IMAGES
INTERSTITIAL WATER
METAMORPHIC ROCKS
PORE STRUCTURE
POROUS MATERIALS
PROGRESS REPORT
RADIOACTIVE WASTES
RESERVOIR ENGINEERING
ROCK MECHANICS
SANDSTONES