Glass Fibre
Mostrando 13-24 de 50 artigos, teses e dissertações.
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13. Viability of hybrid epoxi carbon-glass composite pipe manufacture for use in lower limb prosthesis / Estudo da viabilidade de fabricação de um tubo para construção de uma prótese de membro inferior em composito híbrido epóxi carbono-vidro
Neste trabalho propôs-se a construção de um tubo de material compósito híbrido, com fibra de vidro e fibra de carbono, para utilização como prolongador de prótese de membro inferior a serem fabricadas pela AACD - Associação de Assistência à Criança Deficiente. O objetivo é avaliar as solicitações da prótese para otimizar custo e reduzir a ma
Publicado em: 2007
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14. Estudo sobre a furação de compósito de resina epóxi reforçado com fibras de vidro
The technological development has allowed the manufacture of sophisticated goods, leading to the pursuit of materials able to satisfactorily fulfill these requirements. Materials such as traditional metals, polymers and ceramics are still widely employed; however, they have been increasingly replaced by composite materials, which must be processed to the fin
Publicado em: 2007
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15. Monitoramento da qualidade do ar de ambientes internos : bibliotecas.
The main objective of this study was to monitor and to characterize the particulate material (PM) with equivalent diameter between 2,5 and 10 m (PM2,5-10), particulate with equivalent diameter smaller than 2,5 m (PM2,5), particulate with total suspended particles (TSP), and some pollutant gases (ammonia, chlorine, carbon dioxide, ozone, benzene, carbon monox
Publicado em: 2007
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16. Estudo de vidros fosfatos dopados com terras raras para aplicação em fibras ópticas e guias de ondas planares / Estudo de vidros fosfatos dopados com terras raras para aplicação em fibras ópticas e guias de ondas planares
In this work, the thermal and optical properties is of the system P2O5 - ZnO - Al2O3 - AO - PbO - La2O3 (mol %) + XEr2O3 [A = Ba; Mg; X = 0; 1; 2; 3; 4; 5 (wt %)] was studied aiming at applications in optical fibres and planar waves-guides, as optical amplifiers. Such system is unknown and of low cost if compared with others, for example, those made with tel
Publicado em: 2006
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17. Evaluation of fracture resistance of teeth with flared root canals reconstructed with prefabricated glass fiber posts (associated with accessory posts or fiber strips) or with anatomic posts / Avaliação da resistência à fratura de dentes com condutos alargados e reconstruídos com pinos de fibras de vidro pré-fabricados (associados a pinos acessórios ou fitas de fibras) ou com pinos anatômicos
Avaliou-se a resistência à fratura de dentes tratados endodonticamente e reconstruídos com núcleos metálicos fundidos ou com diferentes procedimentos restauradores empregando pinos de fibras de vidro. Selecionaram-se 50 dentes caninos seccionados na junção cemento-esmalte, tratados endodonticamente e fixados em blocos de resina acrílica. Os dentes fo
Publicado em: 2006
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18. Fatores inibidores do uso de técnicas ambientais nos postos de combustíveis: um estudo de caso em Natal/RN / Inhibiting factors of use of environmental techniques in the gas station: a study of the case Natal/RN
The objective of this work was to investigate the factors that inhibit the use of Environmental Techniques in the Gas Station of the city of Natal/RN. For this, a survey with the aid of a questionnaire was used like research instrument. Its used a sample for convenience, not probabilistic. For collection of the data, it was used directly application of the q
Publicado em: 2006
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19. Influence of the Testing Gage Length on the Strength, Young's Modulus and Weibull Modulus of Carbon Fibres and Glass Fibres
Carbon fibres and glass fibres are reinforcements for advanced composites and the fiber strength is the most influential factor on the strength of the composites. They are essentially brittle and fail with very little reduction in cross section. Composites made with these fibres are characterized by a high strength/density ratio and their properties are intr
Materials Research. Publicado em: 2002-10
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20. Behavior of conventional glass fibers in matrix of Portland cement modified with latex and with the addition of silica fume. / Comportamento das fibras de vidro convencionais em matriz de cimento Portland modificada com látex e adição de sílica ativa.
Portland cement mortar and concrete are durable building materials, relatively cheap and, despite they display a good rigidity and an adequate compressive strength, they have other deficient properties such as tensile strength, impact, fatigue, beyond low toughness and ductility. A considerable improvement of these properties can be obtained adding fibers, i
Publicado em: 2002
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21. Comparison of effects of glass fibre and glass powder on guinea-pig lungs
Botham, Susan K., and Holt, P. F. (1973).British Journal of Industrial Medicine,30, 232-236. Comparison of effects of glass fibre and glass powder on guinea-pig lungs. Following 24 hours inhalation by guinea-pigs of powdered glass dust, the pulmonary effects over the succeeding month differed from those previously observed to follow inhalation of glass fibre
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22. Fibre glass induced synovitis.
Chronic synovitis developed in the dorsal extensor sheath of the hand of a 25-year-old manufacturer of fibre glass reinforced boats and surfboards . Particles found in synovial fluid aspirates were similar in morphology and elemental content to unused fibre glass and particles found in dust from the workshop floor. It was concluded that hard disc grinding re
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23. Comparison of effects on macrophage cultures of glass fibre, glass powder, and chrysotile asbestos
Beck, E. G., Holt, P. F., and Manojlović, N. (1972).Brit. J. industr. Med.,29, 280-286. Comparison of effects on macrophage cultures of glass fibre, glass powder, and chrysotile asbestos. The effects on macrophage cultures of glass fibre, glass powder, and chrysotile asbestos are compared. Glass fibre behaves like chrysotile in producing an increase in cell
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24. Sterilization of air filters for high pre-vacuum autoclaves
Experiments are described with glass fibre filter paper and complete glass filters as fitted to high pre-vacuum autoclaves to determine whether organisms can grow or penetrate through the filters. A filter consisting of four layers of glass fibre paper fitted inside a sterilizer chamber for a year and used for 96 sterilization cycles was found to have retain