Effect of load ratio, testing frequency, temperature, moisture, notch and stacking sequence on the fatigue resistance of woven CFRP laminates

Lani, Frédéric
(2015) 6th International Conference on Fatigue of Composite ICFC2015 — Location: Paris-Le Bourget (25.March.2015)

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Abstract
A woven CFRP composite laminate has been thoroughly characterized under fatigue. Over 150 tests were performed in order to address the effect of sample geometry (Open Hole Tension, Open Hole Compression, Plain Compression, …), testing frequency (5Hz, 30Hz) with and without cooling system, load ratio (R=10., R=-1., R=0.1), temperature (RT and 120°C), moisture intake (50% RH and 85+% RH at RT), notch (Open Hole Vs. Plain Specimen), stacking sequence (3 different stacking sequences) on the measured fatigue life of the specimens. This contribution presents the results of this experimental campaign, under the form of normalized SN curves and Constant Life Diagrams (CLD). An original method is proposed to build the CLD of the material by fitting the dependence of the parameters of the wear-out model proposed by Sendeckyj [1] as functions of an appropriate bounded variable which is in objective relationship with the load ratio R.
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Lani, F. (2015). Effect of load ratio, testing frequency, temperature, moisture, notch and stacking sequence on the fatigue resistance of woven CFRP laminates. 6th International Conference on Fatigue of Composite ICFC2015, Paris-Le Bourget. https://hdl.handle.net/2078.5/191420