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2. Fatigue life prediction. Notion of endurance curve
The growing use of high-performance composite materials is undoubtedly due to their exceptional fatigue resistance. Even lighter than aluminum alloys, they are significantly better than the latter when subjected to cyclic loads.
As a criterion, we usually evaluate the ratio σ D /R m of the endurance limit (or fatigue limit) σ D to the tensile strengthR m .
For composite materials, this ratio is always higher than 0.4 and can reach 0.9. These values should be compared with those for metals and alloys (0.3 for aluminum and 0.4 for iron and its alloys).
The most widely used criterion for assessing...
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Fatigue life prediction. Notion of endurance curve
Tensile fatigue
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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