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Modèle d'interface pour la simulation du comportement des assemblages collés

Abstract : The use of adhesive in composite and metalic components has become increasingly popular. How-ever, the lack of reliable and effient computational tools for the prediction of the load-carrying capacity of such type of junctions have severely limited their range of application. Failure of adhesively bonded joints is the result of the evolution and interaction of several complex degradation processes in the adhesive layer. The damage interface model proposed in this study allows modelling the joints degradation during all the loading phase. This model, which originates from those employed for the analysis of delamination in composites laminates, has been implemented as a part of the finite element code CAST3M. Its implementation was validate by comparison with Linear Fracture Mechanics models and with other
damaging interface models. The difficulty, by using this type of model, is precisely the identification of the interface mechanical parameters. These parameters are valid only for the adhesive, material and the surface treatments for which they were identified. The tests on the bonded structures are thus essential. In this work, the identification of the interface parameters is based on nondestructive acoustic measures
(stiffnesses) and on destructive mechanical measures (critical energies). The identification procedure is validated by the study of other geommetric configurations of a bonded joint. The aim of this work is to have a numerical tool able to bring the reliability and the effectiveness that the industry needs to develop the use of adhesive joints as a method of structural assembly.
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Submitted on : Wednesday, April 26, 2006 - 7:09:23 AM
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  • HAL Id : tel-00012180, version 1

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Silvio de Barros. Modèle d'interface pour la simulation du comportement des assemblages collés. Mécanique [physics.med-ph]. Université de Versailles-Saint Quentin en Yvelines, 2005. Français. ⟨tel-00012180⟩

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