Reparação óssea em alvéolos de ratas ovarectomizadas após implante com biovidro: análise histomorfométrica e imunoistoquímica

Pós-graduação em Odontologia - FOA

Influência do plasma rico em plaquetas derivado do aspirado de medula óssea na cicatrização de defeitos periodontais: estudo histológico, histométrico e imunoistoquímico em ratos

Pós-graduação em Odontologia - FOA

Efeitos biológicos do laser de baixa potência sobre o cultivo de células-tronco mesenquimais provenientes do tecido adiposo e da medula óssea de cães

Pós-graduação em Medicina Veterinária - FMVZ

Evidências do papel da leptina na regulação da formação óssea em pacientes da hemodiálise crônica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Expressão de genes relacionados à remodelação óssea na fase inicial da reabsorção do rebordo residual em mandíbulas humanas

Pós-graduação em Biopatologia Bucal - ICT

Parâmetros genéticos para integridade óssea do fêmur e estudo da associação dos genes runx2 e tnfs11 em frangos de corte

Pós-graduação em Genética e Melhoramento Animal - FCAV

Reparo ósseo dedefeitos de tamanho crítico tratados com aspirado de medula óssea associado ou não a terapia com laser em baixa intensidade: estudo imunoistoquímico em calvárias de ratos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da densidade mineral óssea em mulheres na pós-menopausa tratadas de câncer e mama

Pós-graduação em Ginecologia, Obstetrícia e Mastologia - FMB

Análise histológica e histomorfométrica do processo de reparo de defeitos ósseos em ratos diabéticos preenchidos com osso autógeno e recobertos por membrana de matriz óssea homógena ou por membrana de politetrafluoretileno

Pós-graduação em Odontologia - FOA

Caracterização de osteoblastos diferenciados de células-tronco mesenquimais da medula óssea de ratos espontâneamente hipertensos (SHR)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da sensibilidade insulínica, transdução do sinal insulínico e da densidade mineral óssea em ratas tratadas com fluoreto de sódio

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência de três tratamentos de superfície para cerâmicas a base de zircônia na resistência adesiva e no comportamento à fadiga do material

Pós-graduação em Odontologia Restauradora - ICT

Estudo da fadiga em liga de alumínio aeronáutico 7475-T761

This work will address the study of fatigue conditions with constant load in an alloy of aluminum analysis 7475 - T761, so we can better understand the conditions of the aircrafts which contain this alloy in their structures. A literature review, which was discussed the concepts of fracture mechanics, fatigue, aeronautical components, chemical analysis of aluminum alloys, fatigue problems that appears in the aircrafts, metallographic analysis, and testing of optical microscopy tensile, fatigue and microhardness, surface analysis (MEV) study of the chemical composition of the alloy in question, the main causes of crashes, was performed, completing the work, analysis of data from tensile test, hardness and fatigue together with the interpretation of images of optical microscopy and scanning electron was taken. The data indicated the high mechanical strength of the alloy, along with its microstructure indicating elongated grains and high surface contour, which shows such resistance by hindering the movement of dislocations. The grooves are clearly shown in the MEV images as well as the classic with increased fatigue loading and subsequent reduction of the number of cycles to rupture behavior shown in the graphs. Therefore we observed the optimal behavior is supported by the league when subjected to fatigue loadings

Estudo do comportamento em fadiga das ligas AA6005, AA6063 e AA6351

Aluminum alloys have shown great potential for the automotive industry, especially aluminum alloys 6xxx series. This category has good mechanical strength and excellent corrosion resistance, important for the areas of construction and transport. The automotive industry has always shown great interest in the study of fatigue behavior, because structural components are subjected to cyclic and vibration loads, generating cracks and fracturing. The mechanical response depends on the material properties, applications, surface condition and microstructure. In this work was study the fatigue behavior of high cycle of machined bodies (not polished) and the effect of roughness on the fatigue life for three aluminum alloys of 6xxx series: AA6005, AA6351 and AA606, all in the T6 condition . S / N curves were made from fatigue tests in rotating bending (R = -1). The influence of roughness was studied by measuring the roughness of each specimen. Was compare the fatigue behavior of polished specimen and not polished specimens. The fractured surfaces of samples were observed by MEV, and it was observed that most of nucleation sites for fatigue crack is initiated below the surface

Estudo do comportamento em fadiga de um tubo de aço microligado, grau API 5L X70

This work focuses on a study on the fatigue behavior of a microalloyed steel API 5L X70, used in pipes lines to transport oil and gas. These types of steels have excellent mechanical resistance values and ductility and therefore increased their study driven by increased demand for oil and especially natural gas, which consequently raises the need to build new pipelines to transport these products. The oil extraction units, composed of the risers (pipelines connecting the oil well to the ship), are dimensioned to remain installed for periods of 20 to 30 years in the marine environment, a hostile environment for high pressure, corrosion, low temperatures and the stresses caused by the movement of water and tides. For analysis, the S-N (stress versus number of cycles) curves were obtained from data collected from bodies-of-proof cylindrical longitudinal, transverse and that one removed from the weld area of the pipe, tested in accordance with ASTM E466. Tensile tests were performed for characterizing the mechanical properties of the samples and welded joints, concluded that the values meet the specifications of the standard API 5L. To characterize microstructural material, also metallographic analysis was made of regions of the base metal and the HAZ. The results of fatigue tests demonstrated a higher life for the specimens removed from the longitudinal direction the pipe, followed by those in the transverse direction and, finally, the welded joint. The origins of the fatigue cracks were determined by scanning electron microscopy (SEM)