Thermomechanical analysis of fatigue induced damages in carbon/epoxy laminates

Ophélie Westphal (1) , Laurent Gornet (1) , Laurent Stainier (1) , Patrick Rozycki (1)

1 GeM - Institut de Recherche en Génie Civil et Mécanique

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.

Mots clés: fatigue; self-heating; damage; thermomechanical behavior

Domaines: Mécanique des structures [physics.class-ph]

Ophélie Westphal, Laurent Gornet, Laurent Stainier, Patrick Rozycki. Thermomechanical analysis of fatigue induced damages in carbon/epoxy laminates. 15th European Conference on Composite Materials (ECCM15), Jun 2012, Venise, Italy. ⟨hal-02144433⟩