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Contribution à l'étude en fatigue de structures en aluminium renforcées par patchs composites

Abstract : Aeronautical components are often subjected to fatigue loadings that exhibit variable amplitudes. They also lead to multiaxial stress states which may cause fatigue damage and cracks. This work deals with the preventive reinforcement of such structures with composite patches. The idea is to bond composite patches on damaged structures in some suitable zones so that crack appearance is delayed. The study focuses on the fatigue response of such patched structures assuming that patch shape, location and stacking sequence are optimized beforehand. The beneficial effect of patches is clearly underlined as long as the stress level in the adhesive is not greater than a threshold value close to the shear strength of the glue. A methodology for fatigue assessment under variable amplitude loadings is then proposed.
A specific investigation on the damage process and cumulation for the 2024-T3 aluminium is carried out using an infrared camera.
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https://tel.archives-ouvertes.fr/tel-00204550
Contributor : Marie-Laetitia Pastor <>
Submitted on : Monday, January 14, 2008 - 6:36:03 PM
Last modification on : Thursday, May 24, 2018 - 3:50:02 PM
Long-term archiving on: : Tuesday, April 13, 2010 - 5:36:08 PM

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  • HAL Id : tel-00204550, version 1

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Marie-Laetitia Pastor. Contribution à l'étude en fatigue de structures en aluminium renforcées par patchs composites. Mécanique [physics.med-ph]. Université Blaise Pascal - Clermont-Ferrand II, 2007. Français. ⟨tel-00204550⟩

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