The influence of strain rate and sample inhomogeneity on the moduli and strength of welded tuff

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A series of constant strain rate, unconfined compression experiments was performed on saturated welded tuff specimens collected from Busted Butte near Yucca Mountain, Nevada. Twenty specimens were loaded to failure at strain rates ranging from 10{sup {minus}9}s{sup {minus}1} to 10{sup {minus}3}s{sup {minus}1}, under ambient pressure and temperature conditions. The strength of the specimens showed a continuous decrease with decreasing strain rate between 10{sup {minus}9} s{sup {minus}1} and 10{sup {minus}5} s{sup {minus}1}. At the highest strain rate, 10{sup {minus}3} s{sup {minus}1}, strengths were less than those observed at 10{sup {minus}5} s{sup {minus}1}, likely due to hydrofracturing within the specimen at rapid ... continued below

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17 p.

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Martin, R.J. III; Boyd, P.J.; Noel, J.S. & Price, R.H. December 31, 1992.

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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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A series of constant strain rate, unconfined compression experiments was performed on saturated welded tuff specimens collected from Busted Butte near Yucca Mountain, Nevada. Twenty specimens were loaded to failure at strain rates ranging from 10{sup {minus}9}s{sup {minus}1} to 10{sup {minus}3}s{sup {minus}1}, under ambient pressure and temperature conditions. The strength of the specimens showed a continuous decrease with decreasing strain rate between 10{sup {minus}9} s{sup {minus}1} and 10{sup {minus}5} s{sup {minus}1}. At the highest strain rate, 10{sup {minus}3} s{sup {minus}1}, strengths were less than those observed at 10{sup {minus}5} s{sup {minus}1}, likely due to hydrofracturing within the specimen at rapid loading rates. Reduction in strength, corresponding to the decrease in strain rate, is explained in terms of stress corrosion cracking. A detailed examination of six specimens tested at a strain rate of 10{sup {minus}9} s{sup {minus}1}, using acoustic wave velocities and CT scans, shows a correlation between the nature of the microstructure of the specimens and the observed strengths and elastic moduli.

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17 p.

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INIS; OSTI as DE93009626

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  • 34. US symposium on rock mechanics, Madison, WI (United States), 27-30 Jun 1993

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  • Other: DE93009626
  • Report No.: SAND--92-2152C
  • Report No.: CONF-930644--6
  • Grant Number: AC04-76DP00789
  • Office of Scientific & Technical Information Report Number: 138715
  • Archival Resource Key: ark:/67531/metadc618892

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  • December 31, 1992

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  • June 16, 2015, 7:43 a.m.

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  • April 13, 2016, 2:31 p.m.

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Martin, R.J. III; Boyd, P.J.; Noel, J.S. & Price, R.H. The influence of strain rate and sample inhomogeneity on the moduli and strength of welded tuff, article, December 31, 1992; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc618892/: accessed September 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.