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- W421089341 abstract "1. Introduction 2. Triaxial testing under high confining pressures 2.1. Triaxial testing 2.2.1. Conventional apparatus 2.2.2. Solid-medium Griggs type apparatus 2.2.3. Cubic press 2.2.4. Ultra-high pressure apparatus 2.3. The method of triaxial testing in a cubic press 2.3.1. Apparatus and sample assembly 2.3.2. Experimental procedures at room temperature 2.3.3. Experimental procedures at high temperatures Appendix 2.1. Pressure scale Appendix 2.2. Observed examples of the effect of axial loading on confining pressure 3. Experimemtal results on low porosity silicate rocks 3.1. Compressive strength 3.1.1. Pressure dependence of strength at moderate confining pressures 3.1.2. Pressure dependence of strength at high confining pressures 3.2. Acoustic emission 3.3. Frictional strength under high confining pressures 3.4. Fault features 3.4.1. Sample preparation 3.4.2. Features of faulting Appendix 3.1. Stress-strain curves at room temperature Appendix 3.2. Strength data at room temperature 4. Two types of brittle fracture 4.1. High pressure type of fracture 4.1.1. Comparison with previous high temperature experiments 4.1.2. Transitional regime and semibrittle regime 4.2. Other examples of two types of fracture 4.2.1. Gneiss 4.2.2. Experiments in a cubic press at high temperature 4.2.3. Temperature dependence of strength in the high-pressure type regime 4.3. Micromechanics 4.3.1. Introduction 4.3.2. Micro-fracture styles 4.3.3. Discussion on the mechanisms of fracturing 4.3.4. Summary Appendix 4.1. Strength data at elevated temperatures 5. Geophysical and geological implications of the two types of fracture 5.1. The conditions for application to the earth's interior 5.2. The effect of size on rock strength under confining pressures 5.2.1. The effect of size on uniaxial compressive strength and characteristic length 5.2.2. The effect of size under confining pressure 5.2.3. Implications in the earth's crust 5.3. Strength of the lithosphere 5.3.1. Brittle-ductile model 5.3.2. A model including the high-pressure type fracture 5.4. An approach to earthquake prediction research 6. Mechanical behavior of porous silicate rocks 6.1. Introduction 6.2. Mechanical properties of a porous basalt under high confining pressure 6.2.1. Volumetric strain 6.2.2. AE activity 6.2.3. Boundaries of mechanical states in the differential stress-confining pressure field 6.3. Microstructural observations of porous basalt and the mechanism of cataclastic ductile flow 6.3.1. Macroscopic observations 6.3.2. Microscopic observations 6.3.3. The mechanism of cataclastic ductile flow 6.4. Change in the mechanism of cataclastic flow of porous rock under high confining pressure 6.4.1. Creep analysis and equivalent viscosity 6.4.2. Pressure-induced change in the mechanism of cataclastic flow 6.5. High-pressure embrittlement 6.5.1. High-pressure embrittlement in porous sandstone 6.5.2. Microscopic observations of high-pressure embrittlement in eclogite 6.5.3. Conditions and mechanism of high-pressure embrittlement 6.6. Structure of a fault zone and related geophysical and geological implications Appendix 6.1. Experimental data on the deformation of dry Yakuno basalt with 7% porosity at room temperature Appendix 6.2. Characteristics of the cubic press with a large axial displacement" @default.
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- W421089341 title "Mechanical behavior of rocks under high pressure conditions" @default.
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