Effects of elevated temperature and pore pressure on the mechanical behavior of Bullfrog tuff

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Description

Samples of the Bullfrog Member of the Crater Flat Tuff from the depth interval 758.9 to 759.2 m in hole USW-G1 on the Nevada Test Site were tested in triaxial compression. Test conditions were: (1) effective confining pressure to 20 MPa; (2) temperature of 200{sup 0}C; (3) both dry and with pore water pressures from 3.4 to 5 MPa; and (4) a strain-rate of 10{sup -4}/s. The results suggest that the presence of water causes the strength to decrease. In addition, the brittle-ductile transition pressure for this rock was found to be about 15 MPa, regardless of saturation. Below this ... continued below

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12 p.

Creation Information

Olsson, W.A. February 1, 1982.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Samples of the Bullfrog Member of the Crater Flat Tuff from the depth interval 758.9 to 759.2 m in hole USW-G1 on the Nevada Test Site were tested in triaxial compression. Test conditions were: (1) effective confining pressure to 20 MPa; (2) temperature of 200{sup 0}C; (3) both dry and with pore water pressures from 3.4 to 5 MPa; and (4) a strain-rate of 10{sup -4}/s. The results suggest that the presence of water causes the strength to decrease. In addition, the brittle-ductile transition pressure for this rock was found to be about 15 MPa, regardless of saturation. Below this pressure deformation is characterized by unstable stress drops and the development of a single fracture, and above this pressure deformation is stable and distributed more uniformly throughout the sample.

Physical Description

12 p.

Notes

NTIS, PC A02/MF A01; OSTI as DE82011782

Source

  • Other Information: PBD: Feb 1982

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  • Other: DE82011782
  • Report No.: SAND--81-1664
  • Grant Number: AC04-76DP00789
  • DOI: 10.2172/59453 | External Link
  • Office of Scientific & Technical Information Report Number: 59453
  • Archival Resource Key: ark:/67531/metadc691714

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • February 1, 1982

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • April 13, 2016, 1:39 p.m.

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Olsson, W.A. Effects of elevated temperature and pore pressure on the mechanical behavior of Bullfrog tuff, report, February 1, 1982; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc691714/: accessed August 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.