Improving adhesion strength analysis by the combination of ultrasonic and mechanical tests on single lap joints.

Alice Baudot (1, 2) , Joseph Moysan (3) , Cedric Payan (1) , Noëllie Ylla (4) , Jocelyne Galy (4) , Blandine Verneret (2) , André Baillard (2)

1 LMA - Laboratoire de Mécanique et d'Acoustique [Marseille]
2 SAFRAN Group
3 O&I - Ondes et Imagerie
4 IMP - Ingénierie des Matériaux Polymères

The aim of this paper is to improve knowledge about adhesion strength in single-lap joints by comparison of data from both Non Destructive Testing (NDT) and standard mechanical tests. study presents a high-frequency ultrasonic imaging of aluminum-epoxy-aluminum joints that carefully chemically prepared using two different surface treatments of the aluminum substrate: silanization and chromic-sulfuric etching. The surface energy of the treated substrate is complete set of ultrasonic data are obtained using high-frequency focused transducers. After inspection, single-lap shear tests were performed, and the mechanical strength of each joint is determined. The good cor relations among the surface measurements, the mechanical tests and ultrasonic results are presented and discussed. The demonstration of a close correlation between ultrasonic images obtained at high frequency and the fracture surface is promising.

Mots clés: Lap shear; Adhesion; Epoxy; Ultrasonics

Domaines: Mécanique [physics.med-ph]

Alice Baudot, Joseph Moysan, Cedric Payan, Noëllie Ylla, Jocelyne Galy, et al.. Improving adhesion strength analysis by the combination of ultrasonic and mechanical tests on single lap joints.. The Journal of Adhesion, 2014, 90 (5-6), pp.555-568. ⟨10.1080/00218464.2013.868806⟩. ⟨hal-01027431⟩