A multiscale analysis of the mechanical behavior of a thermo-oxidized c/epoxy lamina |
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Authors: | A Yousfia S Fréour F Jacquemin M Rahmani H Osmani R Guillén |
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Institution: | (1) High Institute of Applied Sciences and Technology of Medenine, University of Gabes, 4100 Medenine, Tunisia;(2) Laboratory of Biochemistry, UR: “Human Nutrition and Metabolic Disorder”, Faculty of Medicine of Monastir, 5019 Monastir, Tunisia;(3) Dipartimento di Scienze Farmaceutiche, Sede di Chimica Bioorganica e Biofarmacia, via Bonanno 33, 56126 Pisa, Italy; |
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Abstract: | The mechanical behavior of carbon-fiber-reinforced polymer matrix composites having undergone a thermo-oxidation process is
studied. The purpose is to perform a multiscale analysis of the consequences of oxidation on the intrinsic mechanical properties
of the external composite ply and on the internal mechanical states experienced by the structure under mechanical loads. The
effective mechanical properties of oxidized composite plies are determined according to the Eshelby–Kr?ner self-consistent
homogenization procedure, depending on evolution of the oxidation process. The results obtained are compared with estimates
found by the finite-element method. The macroscopic mechanical states are calculated for a unidirectional composite and laminates.
The macroscopic stresses in each ply of the structure are determined by the classical lamination theory and the finite-element
method, whereas the local stresses in the carbon fiber and epoxy matrix are calculated by using an analytical stress concentration
relation. |
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