ESTUDO COMPARATIVO DA ABSORÇÃO DE UMIDADE ENTRE COMPÓSITOS POLIMÉRICOS HÍBRIDOS REFORÇADOS COM TECIDOS DE ALTO DESEMPENHO

• DOI: Atena

• Palavras-chave: Compósito Híbrido, propriedades Mecânicas, Absorção de umidade.

• Keywords: Hybrid composite, mechanical properties, moisture absorption.

• Abstract:

  The increasing use of plastic

  reinforced by high performance fabric in

  structural elements, replacing conventional

  materials, challenges the application of these

  composites under harsh circumstances,

  especially under the effects of environment,

  as UV radiation and humidity. Research have

  shown that composites, mainly polymeric, can

  absorb moisture, which can compromise the

  structural integrity, undermine its applicability

  and not keeping its income as high as if it was

  dry. This study’s aim is to compare the influence 

  on the mechanical properties of two hybrid polymer composites reinforced by highperformance fabric cause by the absorption of moisture. The idealized composite had

  as matrix the epoxy vinyl ester resin (DERAKANE 411-350), and, as reinforcement,

  hybrid reinforced kevlar 49 / E-glass fiber fabric and Kevlar 49 / AS4 carbon fabric. For

  the mechanical and absorption tests, 21 specimens were prepared for each composite

  - seven for the uniaxial tensile test, seven for the three point bending test, and seven for

  the absorption test. The specimens were immersed in distilled water up to its saturation

  point. When the saturation was reached, the specimens were properly tested. The

  mechanical properties in the wet state (saturated) results were compared to dry state

  results from literature, to analyze the mechanical properties degradation. A comparative

  study of both composites properties under saturation was conducted. The absorption

  rates are graphically proven. The results found point mechanical properties decreasing

  in both composites. 

• Número de páginas: 15