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Theoretical displacements and stresses near fractures in rock: with applications to faults, joints, veins, dikes, and solution cavities
202A e,,aluation of fracture mechanics parameters for specific crack systems are next examined. Geophysical applications in fields such as tectonics, earthquake studies, and geothermal energy are assessed, and the future perspective discussed.
88439 I Theory of crack initiation and propagation in rock lngraffea, A R In: Fracture Mechanics of Rock. edited by B K Atkinson P71-110. Publ London. Academic Press. 1987 Theories and concepts of fast fracture are examined. The importance of incorporating effects of scale and nonlinearity is emphasised. Crack initiation by the strength of materials and Linear Elastic Fracture Mechanics (LEFM) approaches, and their synthesis into a non-LEFM approach are presented. Theories of non-LEFM crack propagation are described and compared, Examples are illustrated throughout. Computer modelling applications and implementations of the theories are discussed.
884392 Theory of suheritieal crack growth with applications to minerals and rocks Atkinson, B K; Meredith, P G In: Fracture Mechanics o f Rock, edited by B K Atkinson PII1-166 Publ Lomton: Academic Press. 1987 Subcritical crack growth occurs at high temperatures or tn reactive envzronments at values of stress intensity factor and strain energy release rate much lower than those predicted by classical fracture mechanics. Mechanisms for subcritical crack growth are discussed: stress corrosion, diffusional mass transport, dissolution, ion exchange, and microplasticity. Lattice trappmg, thermodynamic, reaction rate, and process zone theories are presented Experimental data for a varnety of rock materials are pro,,ided. Finally. the extrapolation of subcritical crack growth to the earth crust is considered, and effects of stress intensity factor, temperature, pressure, reactive species. mlcrostructure and residual stress discussed.
fracturing are consndered from a theoretical ~ e ~ p o m t Fracture behaviour of crustal rock masses such as gramte under uniaxial tensile conditions and analysed b.~ non-LEFM arc next examined. Finally. simulation of geothermal reservoir conditions..ncluding the effects of rock saturation and pressurised hot water on fracture behaviour, and stress corrosion are analysed. 884394 Theoretical displacements and stresses near fractures in rock: with applications to faults, joints, veins, dikes, and solution cavities Pollard, D D; Segall. P In: Fracture ~Wechanics of Rock, edited by B K Atkinson P277-349. Publ London. Academic Press. 1987 The application of fracture mechanics to structural discontinuities in general is examined. Two dimensional elastostatic problems applied to cracks are first reviewed. Equations and graphs to characterise the elastic displacements and stress fields near a crack are presented. Finally. certain geological problems are discussed: displacements near the San Andreas fault in the 1906 earthquake, joint spacing in layered rock, veins and solution surfaces at terminations of small faults, dilational form of an igneous dyke, and joints in the process zone of an igneous dyke. 884395 Experimental fracture mechanics data for rocks and minerals Atkinson, B K: Meredith, P G In: Fracture Mechan&s of Rock, edited by B K Atkinson P477-525. Publ London ,-I¢'ademic Press. 1987 Important experimental constraints and limatations involved in experimental determination of fracture mechanics parameters are first discussed, with particular reference to geological materials. Some important experimental techniques are reviewed and the reliability of their results examined. Finally tables of experimental fracture mechanics data. methods used and original references arc presented.
884393 Fracture mechanics applied to hot, dry rock geothermal energy Takahashi. H; Abe. H In: Fracture Mechanics of Rock, edited by B K Atkinson P241-276. Publ London: Academic Press. 1987 Natural and artificial cracks are important as heat exchange surfaces and flow paths for hot dry rock geothermal energy projects. Artificial cracks and their extension by hydraulic
L~: 1988 Pergamon Press pie. Reproduction not permitted
88439 I Theory of crack initiation and propagation in rock lngraffea, A R In: Fracture Mechanics of Rock. edited by B K Atkinson P71-110. Publ London. Academic Press. 1987 Theories and concepts of fast fracture are examined. The importance of incorporating effects of scale and nonlinearity is emphasised. Crack initiation by the strength of materials and Linear Elastic Fracture Mechanics (LEFM) approaches, and their synthesis into a non-LEFM approach are presented. Theories of non-LEFM crack propagation are described and compared, Examples are illustrated throughout. Computer modelling applications and implementations of the theories are discussed.
884392 Theory of suheritieal crack growth with applications to minerals and rocks Atkinson, B K; Meredith, P G In: Fracture Mechanics o f Rock, edited by B K Atkinson PII1-166 Publ Lomton: Academic Press. 1987 Subcritical crack growth occurs at high temperatures or tn reactive envzronments at values of stress intensity factor and strain energy release rate much lower than those predicted by classical fracture mechanics. Mechanisms for subcritical crack growth are discussed: stress corrosion, diffusional mass transport, dissolution, ion exchange, and microplasticity. Lattice trappmg, thermodynamic, reaction rate, and process zone theories are presented Experimental data for a varnety of rock materials are pro,,ided. Finally. the extrapolation of subcritical crack growth to the earth crust is considered, and effects of stress intensity factor, temperature, pressure, reactive species. mlcrostructure and residual stress discussed.
fracturing are consndered from a theoretical ~ e ~ p o m t Fracture behaviour of crustal rock masses such as gramte under uniaxial tensile conditions and analysed b.~ non-LEFM arc next examined. Finally. simulation of geothermal reservoir conditions..ncluding the effects of rock saturation and pressurised hot water on fracture behaviour, and stress corrosion are analysed. 884394 Theoretical displacements and stresses near fractures in rock: with applications to faults, joints, veins, dikes, and solution cavities Pollard, D D; Segall. P In: Fracture ~Wechanics of Rock, edited by B K Atkinson P277-349. Publ London. Academic Press. 1987 The application of fracture mechanics to structural discontinuities in general is examined. Two dimensional elastostatic problems applied to cracks are first reviewed. Equations and graphs to characterise the elastic displacements and stress fields near a crack are presented. Finally. certain geological problems are discussed: displacements near the San Andreas fault in the 1906 earthquake, joint spacing in layered rock, veins and solution surfaces at terminations of small faults, dilational form of an igneous dyke, and joints in the process zone of an igneous dyke. 884395 Experimental fracture mechanics data for rocks and minerals Atkinson, B K: Meredith, P G In: Fracture Mechan&s of Rock, edited by B K Atkinson P477-525. Publ London ,-I¢'ademic Press. 1987 Important experimental constraints and limatations involved in experimental determination of fracture mechanics parameters are first discussed, with particular reference to geological materials. Some important experimental techniques are reviewed and the reliability of their results examined. Finally tables of experimental fracture mechanics data. methods used and original references arc presented.
884393 Fracture mechanics applied to hot, dry rock geothermal energy Takahashi. H; Abe. H In: Fracture Mechanics of Rock, edited by B K Atkinson P241-276. Publ London: Academic Press. 1987 Natural and artificial cracks are important as heat exchange surfaces and flow paths for hot dry rock geothermal energy projects. Artificial cracks and their extension by hydraulic
L~: 1988 Pergamon Press pie. Reproduction not permitted