Rock Mechanics
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Experimental study on granite and the determination of its true strain-rate effect
To accurately determine the true strain-rate effect of granite in split Hopkinson pressure bar (SHPB) tests, systematic experimental studies from quasi-static to dynamic loading on the same batch of granite samples is required. Therefore, firstly, splitting, uniaxial and triaxial compression tests were used to study the mechanical response of granite under d
Lat. Am. j. solids struct.. Publicado em: 2015-08
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2. On the crack propagation analysis of rock like Brazilian disc specimens containing cracks under compressive line loading
The pre-existing cracks in the brittle substances seem to be the main cause of their failure under various loading conditions. In this study, a simultaneous analytical, experimental and numerical analysis of crack propagation, cracks coalescence and failure process of brittle materials has been performed. Brazilian disc tests are being carried out to evaluat
Lat. Am. j. solids struct.. Publicado em: 2014-12
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3. Simulador de meios porosos saturados elastoplasticos / Numerical simulator of saturated elastoplastic porous media
The exploration of mineral resources is growing in importance in the Brazilian economy. Since the environments in which these resources are found are becoming increasingly more complex and challenging for the production phase, currently unavailable knowledge and technologies are required to produce these reserves. In the particular well drilling and completi
Publicado em: 2009
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4. Mecânica do contato com o método dos elementos de contorno para modelagem de máquinas tuneladoras. / Contact mechanics with the boundary elements method for the simulation of rock TBM tunneling.
Uma implementação computacional baseada nos conceitos da mecânica do contato e no Método dos Elementos de Contorno é desenvolvida para simular a interação entre discos de corte e maciço rochosos. Simula-se o contato considerando-se inicialmente uma superfície potencial de contato que é atualizada durante um processo de carregamento incremental, pod
Publicado em: 2009
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5. Estudo geoestrutural do maciÃo de Granito Vermelho Frevo SertÃnia-PE
The purpose of this report is to recommend a new methodology for prospecting ornamental rocks massifs. This is why it is important to supply the technical staff, for the future operations of mining of knowledgement of the petrographic and physical-mechanical features of the rock to be extracted and the regime of tensions to be submitted to define the best sy
Publicado em: 2008
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6. Aproveitamento de filer de pedreiras da região metropolitana de Goiânia em pavimentos flexíveis urbanos [manuscrito]: avaliação técnica e sócio-ambiental / Use of filer of quarries in the metropolitan area of Goiania flexible pavements in urban [manuscript]: assessment technical and socio-environmental / Use of filer of quarries in the metropolitan area of Goiania flexible pavements in urban [manuscript]: assessment technical and socio-environmental / Aproveitamento de filer de pedreiras da região metropolitana de Goiânia em pavimentos flexíveis urbanos [manuscrito]: avaliação técnica e sócio-ambiental
The generation of industrial waste has been the object of increasing attention in the field of Science and Technology because of the problems which arise when it is stored and inadequately disposed of. This can have negative consequences for the worker, the company and for the neighboring population. In addition it can generate liabilities for the environmen
Publicado em: 2008
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7. Use of filer of quarries in the metropolitan area of Goiania flexible pavements in urban [manuscript]: assessment technical and socio-environmental / Aproveitamento de filer de pedreiras da região metropolitana de Goiânia em pavimentos flexíveis urbanos [manuscrito]: avaliação técnica e sócio-ambiental / Use of filer of quarries in the metropolitan area of Goiania flexible pavements in urban [manuscript]: assessment technical and socio-environmental / Aproveitamento de filer de pedreiras da região metropolitana de Goiânia em pavimentos flexíveis urbanos [manuscrito]: avaliação técnica e sócio-ambiental
The generation of industrial waste has been the object of increasing attention in the field of Science and Technology because of the problems which arise when it is stored and inadequately disposed of. This can have negative consequences for the worker, the company and for the neighboring population. In addition it can generate liabilities for the environmen
Publicado em: 2008
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8. DEVELOPMENT AND IMPLEMENTATION OF METHODOLOGIES FOR THE DETERMINATION OF THE DEFORMABILITY AND STRESS IN GNAISSIC ROCK MASSES / DESENVOLVIMENTO E IMPLEMENTAÇÃO DE METODOLOGIAS PARA A DETERMINAÇÃO DA DEFORMABILIDADE E TENSÕES EM MACIÇOS GNÁISSICOS
This thesis presents the results from an experimental program with intention to determine the properties of deformabilty and in situ stress in gnaissic rocks. The determination of in situ stress is fundamental for any work in rock mechanics, it is use like field conditions at the in engineering problems, and in bigger scales it gives some indications of the
Publicado em: 2007
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9. INFLUÊNCIA DAS TENSÕES DE ORIGEM TÉRMICA EM PROBLEMAS DE ESTABILIDADE DE BLOCOS ROCHOSOS / INFLUENCE OF THE STRESSES OF THERMAL ORIGIN IN PROBLEMS OF ROCK BLOCKS STABILITY
In 1999, the falls of rock blocks had represented about 8% of the different types of slides registered in Rio de Janeiro. The anthropic activity generates an increase of the risk areas due the building of vulnerable houses near to foot rock scarps, and an acceleration of these phenomena. Since 1993 the number of falls of rock blocks from slopes of disactivat
Publicado em: 2007
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10. ImplementaÃÃo de modelo de dano isotrÃpico aplicado a problemas acoplados hidro-geomecÃnicos
The macroscopic behaviour of a material can be described by constitutive models able to capture the structure observed along the application of several mechanical loading steps. The constitutive behaviour of a bedrock medium shows that for some stress levels hydromechanical models, based in poro-elasticity theories, represent in a satisfactory way the stress
Publicado em: 2007
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11. The application of rock mechanics to the analysis of rock foundations of concrete dams / Aplicação da mecânica de fratura à análise de fundações de barragens de concreto fundadas em rocha
O presente trabalho de pesquisa está relacionado à análise do progresso do fraturamento na zona tracionada de fundações rochosas de barragens de concreto e suas conseqüências nas avaliações de estabilidade global. Tomou-se como exemplo a barragem de Porto Primavera de propriedade da CESP (Companhia Energética de São Paulo), situada entre os estado
Publicado em: 2005
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12. Ensaios não convencionais para determinação da tenacidade à fratura em rochas: análise e comparação / Non-conventional tests for determining the fracture toughness in rocks: analysis and comparison
Since early 1970 s new fracture mechanics concepts have been developed to explain rock fracture behavior. Fracture toughness has been measured and considered as an important intrinsic property of rock indicating the magnitude of fracture strength or its ability to resist crack propagation. Rock fracture mechanics has been widely applied to tectonics, energy
Publicado em: 2004