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Theses

Étude des assemblages collés sous choc - Propriétés mécaniques après choc laser

Abstract : The study presented follows on from the work carried out during different projects in different laboratories concerning the development of a laser shock adhesion test. The goal is to develop a method for evaluating the mechanical properties after laser impact of a bonded assembly. It will therefore not be a question of evaluating a level of adhesion using laser shock, but of considering and evaluating the possible influence of a laser shock on the mechanical properties of an assembly. This study therefore only concerns healthy assemblies, the mechanical properties of which should be evaluated before and after impact, for different amplitudes in the usual pressure range of the LASAT method (LASer Adhesion Test). This characterization of assemblies involves the choice of a method suitable for adhesive joints, capable of taking into account the specificities linked to the geometry of the substrate, but also of generating a desired stress field. The method adopted is the ARCAN mechanical test, capable of evaluating the resistance of a bonded assembly under quasi-static stresses, in tension, in shear or mixed. In addition, the ARCAN test allows the identification of behavioral laws of adhesive joints. Likewise, it is possible to characterize the composite lamellae in their out-of-plane behavior. This work was carried out at Institut de Recherche Dupuy de Lôme (IRDL), on ENSTA Bretagne site (Brest), in partnership with Engie Ineo whose activity, the construction of radomes in composite materials, is concerned with questions of control of bonded assemblies. This work was also the occasion of a collaboration with the CEA DAM DIF which made available ESTHER laser - material interaction simulation code.
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https://tel.archives-ouvertes.fr/tel-03179874
Contributor : Abes Star :  Contact
Submitted on : Wednesday, March 24, 2021 - 3:27:25 PM
Last modification on : Tuesday, March 15, 2022 - 3:04:04 AM

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2018_gilles_tahan.pdf
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  • HAL Id : tel-03179874, version 1

Citation

Gilles Tahan. Étude des assemblages collés sous choc - Propriétés mécaniques après choc laser. Matériaux et structures en mécanique [physics.class-ph]. ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne, 2018. Français. ⟨NNT : 2018ENTA0014⟩. ⟨tel-03179874⟩

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