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A method to determine composite material residual tensile strength in the fibre direction as a function of the matrix damage state after fatigue loading

Article dans une revue avec comité de lecture
Author
CAOUS, Damien
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
BOIS, Christophe
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
WAHL, Jean-Christophe
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
PALIN-LUC, Thierry
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
VALETTTE, Julien
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]

URI
http://hdl.handle.net/10985/12048
DOI
10.1016/j.compositesb.2017.06.021
Date
2017
Journal
Composites Part B: Engineering

Abstract

The phenomenon of residual strength in composite laminates after fatigue loading has been studied for decades but is generally expressed as a function of the number of cycles applied to the specimens. henomenological laws deduced from these tests are therefore loading dependent and identifying a valid model for any loading condition of a given laminate requires long fatigue testing campaigns. To overcome this difficulty, a testing procedure is proposed to express the residual tensile strength of a unidirectional ply in the fibre direction, as a function of its matrix damage. The resulting behaviour is then independent of the imposed loading and can be etermined by only a few fatigue tests. Experimental results obtained on glass-epoxy non-crimp fabric laminates are presented and analysed.

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