Relationships between size, deformation and strength for cylindrical specimens loaded in uniaxial compression
An experimental investigation into the effects of size of cylindrical test specimens on observed axial, lateral, and volumetric stress-strain behavior and strength is described. The effects of end restraint were examined by (1) comparing the output from strain gages located at different points on test specimens, and (2) comparison of stress-strain relationships determined by overall deflection measurements with those from strain gages bonded over the central zone of specimens. General empirical relationships between slenderness ratio, 50% tangent Young's modulus, and ultimate strain, for the different methods of strain measurement were determined. Strain measurements on specimens less than 50 mm diam are high and not representative of material behavior. The degree of nonuniformity of strain distribution, in uniaxially loaded cylindrical specimens was found to increase with increasing stress. (35 refs.)
- Research Organization:
- Dundee Univ., England
- OSTI ID:
- 6561860
- Journal Information:
- Int. J. Rock Mech. Min. Sci.; (United States), Vol. 10:6
- Country of Publication:
- United States
- Language:
- English
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