Aramid
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Ballistic Efficiency of an Individual Epoxy Composite Reinforced with Sisal Fibers in Multilayered Armor
Sisal fibers are among the natural lignocellulosic ones with great impact resistance for potential use in polymer composites. This work evaluates the ballistic efficiency of the distinct individual components of a multilayered armor. These include the front ceramic, the back metallic sheet and the intermediate layer as either the conventional aramid fabric o
Mat. Res.. Publicado em: 23/10/2015
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14. Efeito de fibras sintéticas nas propriedades de ligantes e concretos asfálticos
The asphalt cement plays a major role in hot mix asphalts (HMA) by bonding the mineral aggregates and conferring impermeability. Despite the relatively small percentage of asphalt cement in hot mixes, the mechanical properties of asphalt layers are highly dependent on the quality of the binder. The physical and rheological properties of asphalt binders can b
Publicado em: 2010
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15. Fatigue behaviour study on repaired aramid fiber/epoxy composites
Abstract: Aramid fiber reinforced polymer composites have been used in a wide variety of applications, such as aerospace, marine, sporting equipment and in the defense sector, due to their outstanding properties at low density. The most widely adopted procedure to investigate the repair of composites has been by repairing damages simulated in composite speci
J. Aerosp. Technol. Manag.. Publicado em: 2009-12
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16. Análise do comportamento à fadiga de vigas de concreto armado reforçadas com PRF de vidro, carbono e aramida
Nos últimos anos o conhecimento do comportamento de estruturas de concreto armado reforçadas com materiais compósitos aumentou significativamente, devido aos esforços em pesquisa induzidos pelo crescente interesse da indústria da construção.Todavia, precisam ser mais bem investigadas questões relativas à ligação concreto-reforço, assim como a dur
Publicado em: 2008
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17. Estudo da transmissão e distribuição de tensões aplicadas à resina acrílica convencional e acrescida de fibras através do método fotoelástico / Study of tension transmission and distribution applied upon acrylic conventional resin and strengthened by fibers through photoelastic method
A resina acrílica encontra-se entre os materiais mais utilizados na odontologia. Apesar de suas qualidades, o polimetilmetacrilato ainda mostra-se um material com resistência comprometida. Para tanto, diversos reforços têm sido propostos na literatura e entre eles encontram-se as fibras de vidro e aramida. Apesar de acrescerem na resistência da matriz a
Publicado em: 2007
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18. Effect of the fiber reinforcement on the low energy impact behavior of fabric reinforced resin matrix composite materials
The influence of the fiber used as reinforcement in resin matrix composite materials submitted to repeated low energy impacts is analyzed. The aramid, glass and carbon fiber composites were submitted to drop weight tests from 0.5m and from 1m. The number of impact events necessary to cause failure was recorded, and the fracture characteristics of each compos
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-12
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19. REDISTRIBUIÇÃO DE MOMENTOS EM VIGAS CONTÍNUAS EM ADUELAS PROTENDIDAS COM CABOS SINTÉTICOS EXTERNOS / MOMENT REDISTRIBUTION IN CONTINUOUS SEGMENTAL BEAMS PRESTRESSED WITH EXTERNAL SYNTHETIC TENDONS
An experimental investigation on the behavior of continuous segmental concrete beams, prestressed with external aramid tendons, was carried out. Four beams were tested; one was monolithic and the others were constructed in precast dry- jointed segments. All the beams had the same overall dimensions, with two spans and an I section 30 cm high, flange width of
Publicado em: 2003
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20. Determination of CTOD C in Fibre Metal Laminates by ASTM and Schwalbe Methods
Fibre Metal Laminates (FMLs) have arisen as a demand of the aeronautical industry to use thin sheets with high resistance to fatigue crack growth, high damage tolerance, corrosion resistance and high specific strength. Considering these requirements, FMLs are an advantageous choice when compared to metal alloys currently used. In order to employ FMLs in airc
Materials Research. Publicado em: 2002-06
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21. Desenvolvimento e analise de compositos reforçados com fibras de panox e fibras de aramida utilizados em materiais de fricção em freios automotivos
In this work, had been developed some formulations with intention to analyze the mechanical and physical properties of the composites for use in friction materiaIs, as brake pads, being given the industries, new aItematives in the production of materiais for specific applications. They had been tested you also vary ratio of fibres (aramid and P ANox) and, th
Publicado em: 2002
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22. EXPERIMENTAL INVESTIGATION ON THE STRESS RELAXATION BEHAVIOR OF A HIGH-STRENGTH ARAMID FIBER / ESTUDIO EXPERIMENTAL DEL RELAJAMIENTO DE UNA FIBRA SINTÉTICA DE ALTA RESISTENCIA / ESTUDO EXPERIMENTAL DA RELAXAÇÃO DE UMA FIBRA SINTÉTICA DE ALTA RESISTÊNCIA
High-strength aramid fibers have been used in the production of a variety of cables and ropes which have found several applications as structural members in bridges and other types of structures. For such applications, a sound knowledge of the time dependent material properties is highly important. An experimental investigation on the stress relaxation behav
Publicado em: 1999
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23. ANÁLISE DO COMPORTAMENTO À FLEXÃO DE VIGAS PROTENDIDAS COM CABOS EXTERNOS SINTÉTICOS / ANÁLISIS DEL COMPORTAMIENTO A LA FLEXIÓN DE VIGAS PROTENDIDAS CON CABLES EXTERNOS SINTÉTICOS / ANALYSIS OF THE FLEXURAL BEHAVIOR OF BEAMS PRESTRESSED WITH EXTERNAL TENDONS
Beams prestressed with external tendons have a number of attractions for engineers. They allow a reduction in weight, since concrete is not provided merely to act as cover to tendon or duct; they allow the tendons to be inspected for signs of corrosion and tendons can be replaced or retensioned if necessary. External prestressing is also an ideal application
Publicado em: 1999
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24. INFLUENCE OF THE CONCRETE STRENGTH ON THE BEHAVIOR OF PRESTRESSED BEAMS WITH EXTERNAL ARAMID TENDONS / INFLUENCIA DE LA RESISTENCIA DEL CONCRETO SOBRE LA RESISTENCIA DE VIGAS PROTENDIDAS CON CABLES SINTÉTICOS EXTERNOS / INFLUÊNCIA DA RESISTÊNCIA DO CONCRETO SOBRE A RESISTÊNCIA DE VIGAS PROTENDIDAS COM CABOS SINTÉTICOS EXTERNOS
Este trabajo presenta un análisis experimental de cinco vigas de concreto, simplemente apoyadas, protendidas con cables sintéticos externos, con el objetivo de estudiar la influencia de la resistencia del concreto en la variación de la fuerza de los cables de protensión y en la resistencia a la flexión de las vigas. La protensión de las vigas fue hecha
Publicado em: 1999