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High-pressure mechanical properties of an Area 12, Nevada Test Site tuff
The mechanical properties of tuff from instrument hole UG3, tunnel U12e.06 at the Nevada Test Site have been investigated to 1400 MPa, The shear strength increases from about 5 MHa unconfined to 12 MPa at 300 MPa mean pressure. A brittle-ductile transition was indicated at about 250 MPa. In uniaxial strain, the sample loads to the vicinity of the failure envelope and then is parallel to that envelope up to the highest stresses, 420 MPa. Hydrostatic pressure of 1400 MPa produces about 9% volume compression and 1.3% permanent compaction in this apparently saturated tuff. (auth)
Date:
November 19, 1973
Creator:
Duba, A.; Abey, A. E. & Heard, H. C.
System:
The UNT Digital Library
Acoustic emission source location on a nonspherical surface of revolution
None
Date:
November 19, 1973
Creator:
Sackschewsky, V. E. & Lott, L. A.
System:
The UNT Digital Library