Avaliação, por extensometria, da deformação superficial no substrato de retenção dos implantes gerada por próteses fixas implanto suportadas em função do cantilever

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeitos do tipo, tamanho e teor de agregado graúdo no módulo de deformação do concreto de alta resistência

O concreto, material de composição heterogênea e complexa, é o principal insumo em construções. Do ponto de vista estrutural, ele tem como propriedade principal sua resistência. O estudo do comportamento do concreto, baseado em estudos conceituais da resistência granular, pode conduzir a um projeto estrutural mais seguro e de melhor utilização do material. Este trabalho expõe os resultados de um estudo conduzido para avaliar os efeitos do tipo, tamanho e teor de agregado graúdo no módulo de deformação do concreto de alta resistência. A mistura de concreto estudada contém agregados de basalto e de granito com dimensões máximas características de 9,5 mm e 19 mm e relação água/cimento de 0,35. O módulo de elasticidade do material foi determinado usando o trecho inicial linear da curva Carga-CMOD (deslocamento de abertura da boca da fissura) no ensaio de flexão com três pontos em viga entalhada no meio do vão, seguindo a proposta do comitê técnico 89-FMT da RILEM (Internacional Union of Testing and Research Laboratories for Materials and Structures).

Análise de parâmetros adimensionais num escoamento em meio poroso visando a deformação de elementos cerâmicos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise de deformação da rede GNSS/SP com base na teoria da elasticidade

Pós-graduação em Ciências Cartográficas - FCT

Aparelho para medição de ângulo de inclinação de estruturas de grande porte por meio de sensor de deformação bidirecional

Compreendido por um bloco (A) constituído de material metálico, possuindo quatro parafusos para fixar o sensor à estrutura, bem como possui grande resistência mecânica a deformação quando ocorre a inclinação da estrutura, de maneira que o bloco (A) está ligado ao bloco (B) por meio de parafusos internos, sendo o bloco (B) desenvolvido em duralumínio, o qual sofre a ação de grandes tensões provocadas pela sensibilização decorrente da existência de dois orifícios retangulares (E) passantes que criaram as regiões sensoras (rs1) e (rs2), sendo que em cada região sensora existem duas membranas laterais ao orifício, de forma que, devido a sensibilização das regiões (rs1) e (rs2)

Influência da adição de nanopartículas sobre a dureza, resistência à ruptura e deformação permanente de silicone facial submetido ao envelhecimento acelerado

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação do comportamento mecânico sob deformação da liga Ti- 30Ta visando aplicações biomédicas

Titanium and its alloys have been used for biomedical applications due their excellent properties such as high corrosion resistance, biocompatibility and mechanical properites. In this study, microstructural and mechanical properties of Ti-30Ta alloy was evaluated during its processing. Ti-30Ta alloy ingots were produced from sheets of commercially pure titanium (99.9%) and tantalum (99.9%). Its melting was realized in arc melting furnace in an argon atmosphere. After homogenizing at 1200ºC, ingots were cold worked by swaging. Samples with 13 mm in diameter were obtained. They were forging at the reduction ratios of 15%. After deformation, microstructure was evaluated by optical microscopy in each condition. Also, Vickers microhardness of samples was measured and phase constitution was evaluated using XRD analysis

Investigação sobre deformação neotectônica no lineamento Guapiara, região de Ourinhos, Fartura-SP e Santo Antonio da Platina - PR

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo da deformação heterogênea no ensaio do anel de atrito

The plastic deformation is widely used in the metallurgical market due to its positive factors such as low prices and high speed production. Forming process products are obtained in high quality, both surface quality and mechanical properties. Friction is an importante factor in metal forming. Friction study in metal forming can be accomplished indirectly, such as the ring test of friction. Two samples of different materials being mild steel and copper alloy were used. The results showed the influence of friction in the flow behavior of the deformation of the second phase, as evidenced by standard metallography. It is observed that in the outer regions of the ring, plastic deformation occured in the radial direction. In the central region of the disc deformation occured in the direction of compression and the inner region of the ring flux lines showed a significant deformation in the radial direction towards the center of the ring

Investigação sobre deformação neotectônica no lineamento Guapiara, região de Guapiara e Jacupiranga

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Influência da deformação a frio na recristalização da liga Ti-30Ta para aplicações médicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da resistência à corrosão da liga Ti-30Ta submetida a diferentes taxas de deformação visando aplicações biomédicas

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

Determinação comparativa do grau de deformação plástica aplicado a componentes obtidos por conformação

The manufacturing process of components of Pressure Vessels has a great importance in the efficiency during the operation and life cycle of the equipment. Taking this into account, the objective of this dissertation was to analyze the methods to determine the strain rate in formed components by measuring the components themselves, and posterior results comparison with the values found in manufacturing standards of Pressure vessels. In this study the whole manufacturing process of a component from a pressure vessel, known as Head or End, was accompanied. Using the methodology obtained from literatures it was possible to execute the relative and logarithmic deformation measurements of these components and compare with the obtained results by means of equations presented in the Standards as AD-Merkblatt and ASME (for pressure vessels). The found results were also compared with the logarithmic methodology, taking into account the deformation of the empirical mesh and the thickness of the components studied. It is possible to conclude from this study that despite the existence of empirical methods of measurement of strain rate in components plastically formed, it is recommended the adoption in all situation of the component manufacturing standard. It can be noticed and explained during the development of this study and through the results found

Avaliação da resistência à corrosão da liga Ti-30Ta submetida a diferentes taxas de deformação visando aplicações biomédicas

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

Determinação comparativa do grau de deformação plástica aplicado a componentes obtidos por conformação

The manufacturing process of components of Pressure Vessels has a great importance in the efficiency during the operation and life cycle of the equipment. Taking this into account, the objective of this dissertation was to analyze the methods to determine the strain rate in formed components by measuring the components themselves, and posterior results comparison with the values found in manufacturing standards of Pressure vessels. In this study the whole manufacturing process of a component from a pressure vessel, known as Head or End, was accompanied. Using the methodology obtained from literatures it was possible to execute the relative and logarithmic deformation measurements of these components and compare with the obtained results by means of equations presented in the Standards as AD-Merkblatt and ASME (for pressure vessels). The found results were also compared with the logarithmic methodology, taking into account the deformation of the empirical mesh and the thickness of the components studied. It is possible to conclude from this study that despite the existence of empirical methods of measurement of strain rate in components plastically formed, it is recommended the adoption in all situation of the component manufacturing standard. It can be noticed and explained during the development of this study and through the results found