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Theses

Caractérisation et modélisation des joints de colles sous sollicitations bi-axiales statiques

Abstract : Today, structural bonding presents an interesting alternative to conventional methods of assembly, in order to reduce the weight within aeronautical structures. However, the use of this method raises many questions in terms of design, characterization or modeling. This work presents a robust experimental work, aiming two main objectives: (i) select the most suitable instrumentation for the characterization of the behavior of bonded joints up to failure and (ii) predict the behavior of bonded joints from complete characterization and modeling under quasi-static bi-axial loading, using a simple test, directly integrated to industry. In a first stage, to achieve this goal, modified Scarf test has been proposed to characterize the mechanical behavior of adhesive joints. This type of specimen allows applying multiaxial loadings without having high-stress concentrations near the edges. The second part of the thesis deals with the development of a strategy for simplifying the characterization of a bonded joint using some hypotheses (stress/strain states). This strategy allows obtaining the intrinsic behavior of the adhesive in the form of the stress/strain curves. The last part of this work deals with the identification and selection of the most appropriate instrumentation systems in the experimental characterization.
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Jaime Destouesse Villa. Caractérisation et modélisation des joints de colles sous sollicitations bi-axiales statiques. Mécanique des matériaux [physics.class-ph]. ENSTA Bretagne - École nationale supérieure de techniques avancées Bretagne, 2018. Français. ⟨NNT : 2018ENTA0008⟩. ⟨tel-02368707⟩

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