969 resultados para Materias - Deformações


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This study aims to evaluate the corrosion resistance of Ti-30Ta alloy when subjected to different strain rates. Samples of the alloy Ti-30Ta were obtained from the melting of pure elements in the arc furnace in inert atmosphere (argon gas). Then, the samples were subjected to a thermal treatment and to cold worked to obtain bars. After forging, the samples were machined in accordance with ASTME9-09 standard for carried out compression tests. To microstructural characterization, samples were sectioned longitudinal and transversally and embedded in resin. After, the wet sanding and polishing were performed, followed by a chemical attack, in order to study the microstructure under an optical microscope. Microhardness was measured on the samples that were subjected to microstructural characterization by using microhardness tester. Phases were evaluated by x-rays diffraction. Corrosion tests were carried out to evaluate the influence of deformation on the corrosion resistance. Results show that microstructure was not influenced by deformation

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The world population is growing at exponential scales, thus the demand for food grows significantly. The use of pesticides is seen as a way to meet the demand for food and increase the efficiency and productivity of the agricultural sector. BASF SA in partnership with packaging suppliers represent a remarkable scene in the Brazilian market in the agrochemicals sector. In 2014, the Department of Agro from BASF Packaging, identified in its production process certain deformation of its rigid packaging during the filling process of pesticides. This phenomenon is probably caused by the low resistance to compression that the package is used. In order to eliminate the deformation of rigid packaging arising from the filling step, a study will be conducted in conjunction with the supplier JET UNIPAC whose on line problems occurred more frequently. The study is to identify the strength of the rigid containers standardize a compression resistance value at which the package is not deformed after the filling step. This study will present an investigation through experiments combined with theoretical concepts in order to determine possible causes for the emergence of this phenomenon. At the end of the study, a solution to eliminate or reduce to the maximum the packaging deformation problem appears

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This study aims to evaluate the corrosion resistance of Ti-30Ta alloy when subjected to different strain rates. Samples of the alloy Ti-30Ta were obtained from the melting of pure elements in the arc furnace in inert atmosphere (argon gas). Then, the samples were subjected to a thermal treatment and to cold worked to obtain bars. After forging, the samples were machined in accordance with ASTME9-09 standard for carried out compression tests. To microstructural characterization, samples were sectioned longitudinal and transversally and embedded in resin. After, the wet sanding and polishing were performed, followed by a chemical attack, in order to study the microstructure under an optical microscope. Microhardness was measured on the samples that were subjected to microstructural characterization by using microhardness tester. Phases were evaluated by x-rays diffraction. Corrosion tests were carried out to evaluate the influence of deformation on the corrosion resistance. Results show that microstructure was not influenced by deformation

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The world population is growing at exponential scales, thus the demand for food grows significantly. The use of pesticides is seen as a way to meet the demand for food and increase the efficiency and productivity of the agricultural sector. BASF SA in partnership with packaging suppliers represent a remarkable scene in the Brazilian market in the agrochemicals sector. In 2014, the Department of Agro from BASF Packaging, identified in its production process certain deformation of its rigid packaging during the filling process of pesticides. This phenomenon is probably caused by the low resistance to compression that the package is used. In order to eliminate the deformation of rigid packaging arising from the filling step, a study will be conducted in conjunction with the supplier JET UNIPAC whose on line problems occurred more frequently. The study is to identify the strength of the rigid containers standardize a compression resistance value at which the package is not deformed after the filling step. This study will present an investigation through experiments combined with theoretical concepts in order to determine possible causes for the emergence of this phenomenon. At the end of the study, a solution to eliminate or reduce to the maximum the packaging deformation problem appears

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Integran este número de la revista ponencias presentadas en Studia Hispanica Medievalia VIII: Actas de las IX Jornadas Internacionales de Literatura Española Medieval, 2008, y de Homenaje al Quinto Centenario de Amadis de Gaula

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João da Fonseca nasceu em Viana do Além-Tejo, em 1632, e morreu em Lisboa, em 1701. Foi professor de Filosofia na Universidade de Evora e missionário em várias vilas e cidades e mestre do noviciado de Coimbra. Distinguiu-se em seu tempo na Teologia Ascética, como se comprova nas obras que nos deixou, as quais são ainda apreciadas pela correção e propriedade da linguagem. Em ‘Escola da Doutrina Christã’, o autor ensina o verdadeiro caminho da vida, resumindo nesta leitura tudo o que em muitos volumes ensina a teologia especulativa e moral. Todas as matérias de que trata são confirmadas com muito se notáveis exemplos. Trata-se, aqui, da primeira edição, impressa em 1688. Tem-se noticia de uma segunda edição publicada pela Oficina da Universidade, em 1750.

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Homenaje a Ignacio Barandiarán Maestu / coord. por Javier Fernández Eraso, Juan Santos Yanguas

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O presente trabalho tem como objetivo a análise numérica do comportamento dos aterros instrumentados que compõem a obra do Arco Metropolitano do Rio de Janeiro. Os resultados da instrumentação de campo serão retroanalisados, juntamente com dados disponíveis na literatura, buscando-se a definição de parâmetros confiáveis, representativos do comportamento da argila compressível da região em estudo. O Arco Metropolitano do Rio de Janeiro é uma rodovia projetada que servirá como ligação entre as principais rodovias que cortam o município do Rio de Janeiro. Devido a presença de grandes espessuras de solo compressível em alguns trechos da região, cortados pelo traçado da rodovia, instrumentos de monitoramento, como placas de recalque e inclinômetros, foram utilizados para avaliar os deslocamentos verticais e horizontais dos aterros durante o processo construtivo. Para este trabalho foram selecionados trechos de aterros representativos, devido à magnitude dos recalques, qualidade do resultado da instrumentação e diferentes métodos construtivos. A partir da análise dos parâmetros de projeto e dos parâmetros encontrados na literatura, procede-se à simulação numérica do processo construtivo dos aterros selecionados com o programa PLAXIS, de elementos finitos, através de modelagem bidimensional. Os resultados numéricos são confrontados com a instrumentação de campo (placas de recalque e inclinômetros) e com os resultados de previsões teóricas (teoria de adensamento unidimensional). Os resultados comprovaram que a modelagem numérica mostrou-se uma ferramenta adequada para a previsão dos recalques totais, tempos de adensamento e ganho de resistência ao longo do tempo. A retroanálise do comportamento de aterros sobre solos moles permite a reavaliação das premissas de projeto, uma vez que as limitações das teorias de análise e a dificuldade na seleção de parâmetros, muitas vezes acarretam em estimativas de recalque incoerentes com as observações de campo.

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Editio novissima cui praeter Annotationes Emanuelis Suarez a Ribeira, accesserunt Illustrationes, sive Additiones Joannis de Ayllon Laynez in fine cujusque Capitis appositae, cum Indice Generali.

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Nueva impresion, en la qual van puestas las adiciones del Suplemento en sus lugares.