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Caractérisation des interfaces colle/substrat des assemblages collés : application aux structures hydroliennes

Abstract : Due to the complexity of their installation and their maintenance on-site, the operating life of the Renewable Marine Energie operating systems must be up to 15 years. The sustainability of their structure remains, therefore, a major challenge. The manufacturing of these structures is based on combination of materials often assembled by structural bonding. The long-term behaviour (fatigue, durability in marine environments) of this type of hybrid structures remains little known. This is why the purpose of the ANR France Energies Marines INDUSCOL project, in which this work is carried out, concerns the development of rules for the design and the maintenance of EMR systems. The key 23 ème Congrès Français de Mécanique Lille, 28 Août au 1 er Septembre 2017 issues are the prediction of the durability of EMR structures and the development of instruments dedicates to the monitoring of tidal turbines. Working on the durability in marine environments of two-component epoxy adhesives has raised problems related to the mechanical phenomena taking place at the interfaces, i.e. between the adhesive joint and the various substrates [1] [2]. These phenomena leading either to a cohesive failure (within the adhesive joint) or to an adhesive failure (at the interface between the adhesive joint and the substrates) must be studied in detail. Indeed, the alteration of the adhesive properties can lead to an adhesive failure which significantly reduces the mechanical strength of the bonded assembly. First, we propose to characterize the mechanical behaviour of the adhesive by testing on bulk specimens. The parameters of a viscoelastic-viscoplastic behaviour law will be validated by using modified ARCAN specimens on aluminium / adhesive / aluminium assemblies. The influence of the water exposure aging on the material parameters will be studied by these bulk tests in order to describe the behaviour of ageing bonded assemblies. In a second step, the monitoring of these assemblies will be proposed in order to characterize the mechanical properties of the interfaces. An application of this type of instrumentation will be put in place to monitor the assemblies on in-service water turbines structures.
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  • HAL Id : hal-01730084, version 1

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Johnathan Leplat, Pierre Bidaud, David Thévenet. Caractérisation des interfaces colle/substrat des assemblages collés : application aux structures hydroliennes. 23ème Congrès français de mécanique - CFM, Aug 2017, Lille, France. ⟨hal-01730084⟩

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