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ANR funded project

Blanc - SIMI 9 - Sciences de l'Ingénierie, Matériaux, Procédés, Energie (Blanc SIMI 9) 2012
Projet ISABEAU

Innovating for Structural Adhesive Bonding Evaluation and Analysis with Ultrasounds

The goal of the project ISABEAU (Innovating for Structural Adhesive Bonding Evaluation and Analysis with Ultrasounds) is to overcome technological obstacles that blocks verification of the integrity of bonded joints with NDT methods, the case of kissing bonds remains a major scientific challenge years after years. The development of an acoustic method quantifying the adhesive “level” of a bonded joint is also expected. To advance the state of knowledge and overcome technological barriers identified, the partners want to achieve a leap in quality analysis of substrates and adhesives prior to assembly in order to better separate the causes of defects and to identify adhesion parameters.
To reach this goal, the collaboration between physical chemists and NDT experts is necessary to establish the link between studies of physical chemistry and ultrasounds measurements by studying the relation between scales of description used in physical chemistry (nano, micro) and scales used in acoustics (micro, meso).
Progressive steps are planned: a study of the substrate alone, study of the adhesive, study of the substrate / adhesive, study of the assembly substrate / adhesive / substrate in order to better correlate the non-destructive measurements to physical, chemical and mechanical properties of each part. These results will help developing the analytical or numerical models used to analyse the non-destructive testing and the mechanical testing.
The type of assembly mainly studied "aluminum / epoxy / aluminum" is very representative of problems encountered in the structural bonding. The partners have chosen not to expand the type of assembly in order to fully work together on the project.
These studies have a methodological approach in order to generalize the findings to other types of assemblies. The nondestructive characterization laboratories develop the most promising methods: guided waves, nonlinear acoustics methods with the prospect of studying also high levels of stress in comparison with normal non-destructive methods. The project is built on joint work to accelerate the dissemination of knowledge and provide excellent synergy between partners.
The four partners Laboratoire de Mécanique et d’Acoustique (LMA), Fédération Acoustique du Nord Ouest (FANO), l’Institut de Mécanique et Ingénierie de Bordeaux (I2M) et le Laboratoire Ingénierie des Matériaux Polymères (IMP) bring together important, very diverse and very complementary destructive and nondestructive means to perfectly characterize substrates, adhesives and bonded assemblies. They rely on the support of two major aerospace companies ASTRIUM S.T. and SAFRAN.
The long-term project is to optimize the entire process of bonding to expand its scope application and increase confidence in the assembly process allowing its deployment in many fields of applications.

Partners

CNRS - FANO Centre National de la Recherche Scientifique - Fédération Acoustique du Nord-Ouest

CNRS DR12_LMA CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Délégation Provence et Corse-Laboratoire de Mécanique et d'Acoustique

I2M Institut de Mécanique et Ingénierie de Bordeaux

IMP Laboratoire d'Ingénierie des Matériaux Polymères

ANR grant: 569 997 euros
Beginning and duration: février 2013 - 48 mois

 

ANR Programme: Blanc - SIMI 9 - Sciences de l'Ingénierie, Matériaux, Procédés, Energie (Blanc SIMI 9) 2012

Project ID: ANR-12-BS09-0022

Project coordinator:
Monsieur Joseph MOYSAN (CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE Délégation Provence et Corse-Laboratoire de Mécanique et d'Acoustique)
joseph.moysan@nulluniv-amu.fr

 

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The project coordinator is the author of this abstract and is therefore responsible for the content of the summary. The ANR disclaims all responsibility in connection with its content.