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9. Conclusion
The properties of high-performance composites offer many advantages in fatigue compared to metallic materials. Their endurance limit in cyclic tension is higher than that of metals, and composite materials are less sensitive to the notch effect in fatigue than metallic materials. On the other hand, cyclic compression stresses remain the critical point. Any passage in compression can lead to reductions of around 30% compared to cyclic tension. This aspect must therefore remain a point of vigilance for design offices.
The nature of damage in composite materials does not depend on the type of stress, but is strongly conditioned by the anisotropic nature of these materials. The fact that they are designed as laminated structures leads to very specific types of damage, the directions of which are guided by the reinforcements. While ply cracking remains acceptable, and...
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Conclusion
Bibliography
Software tools
Commercial finite element calculation codes (ABAQUS, ANSYS...) do not perform fatigue calculations, but calculate for a given number of cycles. The material characteristics then correspond to the residual properties for the number of cycles concerned. The question then remains: for which cycles is it wise to perform these calculations? The answer can be found in the cycle skipping techniques mentioned in [AM 5 410] § 8.2....
Events
ICFC5, Fifth International Conference on Fatigue of Composites 16-19, October 2010 Nanjing, China.
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Organizations – Federations – Associations (non-exhaustive list)SF2M, Société Française de Métallurgie et de Matériaux. Fatigue Commission http://www.sf2m.asso.fr
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