Visoelastic behavior of carbon epoxy composites by creep tests
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2010
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EUROPEAN CONFERENCE ON COMPOSITES MATERIALS, 14th
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Resumo
One of the main requirements for the use of fiber-reinforced polymer matrix composites in
structural applications is their evaluation during service life, which demands a study of the
time dependent behavior due to viscoelastic response of the polymeric matrix. In the present
study, creep and creep rupture test in constant load were performed in specimens of
unidirectional carbon fiber-reinforced epoxy composites with fibers orientations of 90º, at
temperatures of 25 and 70 ºC. The aim is the viscoelastic characterization of the material
through the creep curves to some levels of constant load during periods of 1000 h, the
attainment of the “creep rupture envelope” by the creep rupture curves and the determination
of the transition from linear to non-linear behavior through isochronous curves. In addition,
comparisons of creep compliance curves with a viscoelastic behavior prediction model based
on Schapery equation were also performed. It was noted a modification of the material
behavior regarding the strength, stiffness and deformation, showing that these properties
were affected for the time and tension level, especially above the room temperature. The
prediction model was capable to represent the creep behavior, however the equations
components may change with the applied tension and the elapsed time of test.
Como referenciar
MARINUCCI, G.; FARINA, L.C.; CARVALHO, O. Visoelastic behavior of carbon epoxy composites by creep tests. In: EUROPEAN CONFERENCE ON COMPOSITES MATERIALS, 14th, June 7-10, 2010, Budapest, Hungary. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/14208. Acesso em: 30 Dec 2025.
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