Micromechanics of failure in brittle geomaterials. Final technical report (for 7/1/1994 - 8/31/2000)

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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 ... continued below

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4 p.

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Wong, Teng-fong December 1, 2000.

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Description

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.

Physical Description

4 p.

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OSTI as DE00809810

Medium: P; Size: 4 pages

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  • Other Information: PBD: 1 Dec 2000

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  • Report No.: DOE/ER/14455--1
  • Grant Number: FG02-94ER14455
  • DOI: 10.2172/809810 | External Link
  • Office of Scientific & Technical Information Report Number: 809810
  • Archival Resource Key: ark:/67531/metadc733923

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  • December 1, 2000

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

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  • April 10, 2017, 8:14 p.m.

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Wong, Teng-fong. Micromechanics of failure in brittle geomaterials. Final technical report (for 7/1/1994 - 8/31/2000), report, December 1, 2000; United States. (digital.library.unt.edu/ark:/67531/metadc733923/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.