figure 1. typical stress strain response curves for an...
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Figure 1. Typical Stress Strain Response Curves for an Intact Rock Sample Subject toUniaxial Compression.
Figure 2. Methods for Calculating Young's Modulus from Axial Stress - Strain Curves (afterBieniawski and Bernede, 1979).
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Figure 3. Example of calculation of Young's moduli (after Johnson and Degraff, 1988).
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Figure 4. Orthotropic rock with three planes of symmetry normal to the n,s,t directions.
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Figure 5. Histograms of Emax/Emin ratios for quartzofeldspathic and basic/lithic rocks in (a),pelithic clay and pelithic mica rocks in (b) and carbonate rocks in (c) (after Worotnicki,1993).
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Figure 6. Transversely isotropic rock sample tested under uniaxial compression.
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Figure 7. Three specimens of transversely isotropic rock tested in uniaxial compression with(a) 2 = 0°, (b) 2 = 90° and (c) 2 …0 and 90°.
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Figure 8. Diametral loading of a disc of anisotropic rock over an angular width 2" (afterAmadei et al., 1983).
Figure 9. Measurement of the elastic properties of an orthotropic rock using three diametralcompression tests. Each disc has a middle plane parallel to a plane of elastic symmetry.