Effects of sample size on the mechanical behavior of Topopah Spring tuff
Thirty-four mechanical experiments were performed on intact cylindrical samples of the Topopah Spring Member of the Paintbrush Tuff taken from an outcrop on Busted Butte, southeast of Yucca Mountain in southern Nevada. The samples ranged in diameter from 25.4 to 228.6 mm, and all had a nominal length to diameter ratio of 2:1. All samples were water saturated and deformed in compression at atmospheric confining pressure, room temperature, and a nominal strain rate of 10{sup -5} s{sup -1}. Young`s modulus and Poisson`s ratio were found to have no significant trend with changes in sample size. Ultimate strength and axial strain at failure were both inversely related to sample diameter, with simple power-law models fitting the data trends very well.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States). Geomechanics Div.
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 59939
- Report Number(s):
- SAND--85-0709; ON: DE86016024
- Country of Publication:
- United States
- Language:
- English
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