Contrôle et optimisation du test d'adhérence par choc laser sur assemblages collés

Abstract : Bonding process generalization within aerospace, aeronautical and automotive structures faces the need of quantitative non-destructive evaluation of assemblies. Laser shock adhesion test (LASAT) meets this requirement by applying a calibrated stress to bonded joints and using non-destructive diagnostics to determine the post-shock state of the joint. The calibrated stress must disbond weak joints and keep correct assemblies intact. Optimal laser parameters determination aims at implementing this non-destructive proof test (ND-LASAT). It is achieved through application of a well-defined methodology, which implies the concerned assembly characterization by an experimental and numerical approach, followed by an optimization step. Optimization implies diversification of laser-matter configurations. Use of numerical tools for predicting loadings applied to bonded joints is then required. Models development within a multi-physics code is proposed and validated here to respond to this need. A significant effort has been made for evaluating models’ precision. Experimental demonstration of ND-LASAT process is achieved on three different bonded assemblies, and thus validating both methodology and numerical chain developed in this study.
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https://pastel.archives-ouvertes.fr/tel-01738520
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Submitted on : Tuesday, March 20, 2018 - 3:39:11 PM
Last modification on : Wednesday, June 12, 2019 - 5:02:58 PM
Long-term archiving on : Tuesday, September 11, 2018 - 8:56:53 AM

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  • HAL Id : tel-01738520, version 1

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Simon Bardy. Contrôle et optimisation du test d'adhérence par choc laser sur assemblages collés. Mécanique des matériaux [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2017. Français. ⟨NNT : 2017ENAM0061⟩. ⟨tel-01738520⟩

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