Thermomechanical analysis of fatigue degradations in carbon epoxy laminates
Résumé
The tensile fatigue behavior of a high stress carbon fiber epoxy-matrix composite laminates was examined at room temperature. Tension-tension cyclic fatigue tests were also conducted under load control at a sinusoidal frequency of 5 Hz to obtain stress-fracture cycles (S-N) relationship. The fatigue limits of the different lay-up tested were found and compared with the data resulting from self-heating tests on the same materials. This comparison reveals a good accordance between the two methods of fatigue limit determination. A macroscopic fatigue damage evolution law is then proposed to reproduce the experimental data.
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