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5. Flexural fatigue
Bending tests on composite materials are widely used in industrial environments, thanks to their flexibility of application and the simple geometry of the specimens. Unlike tensile and compression tests, this type of testing requires no special specimen fixturing or heel bonding. What's more, flexural testing is often the only method available for assessing the properties of composites under specific or even aggressive environmental conditions (temperature, humidity, salt spray, etc.). What's more, this test requires much lower loads to failure than tensile and compression tests, enabling the use of testing machines and load cells with lower capacities. These observations explain the number of studies devoted to bending, both static and fatigue. But the analysis of this test remains complicated. While stress states are homogeneous in tension and compression, this is not the case for bending,...
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Flexural fatigue
Post-impact 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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