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Article Dans Une Revue Composite Structures Année : 2022

Design of a set-up for measuring the residual compressive strength after high load and high cycle compression fatigue on CFRP

V. Keryvin
P.-Y. Mechin
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R. Balze
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Résumé

A new testing set-up to measure the compressive strength of continuous fibre composite materials (CFRP) under both static and fatigue loadings is described. A specific symmetric sandwich beam with CFRP face sheets is used with a four-points bending set-up. Its mechanical design is carried out by fine Finite Element Analyses (FEA) to ensure that the failure mode is axial compression by fibre micro-buckling. Precise comparisons between numerical simulations and experimental quasi-static experimental results are found to be sound, validating the FEA model. The latter is used to design the sandwich beam in terms of strength and stability criteria. Finally, a high cycle fatigue campaign (10 cycles) with high modulus CFRP skins demonstrates the performance of the set-up. Repeatable results and acceptable failure modes are obtained.
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hal-03830296 , version 1 (22-07-2024)

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A. Launay, V. Keryvin, J.-C. Grandidier, P.-Y. Mechin, R. Balze. Design of a set-up for measuring the residual compressive strength after high load and high cycle compression fatigue on CFRP. Composite Structures, 2022, 286, pp.115294. ⟨10.1016/j.compstruct.2022.115294⟩. ⟨hal-03830296⟩
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