Evaluation of epoxy bonded joint quality using nonlinear acoustics

C. La Rocca (1) , C. Payan (1) , J. Moysan (1)

1 O&I - Ondes et Imagerie

The topic of ultrasonic evaluation of bonded joint quality is of interest in many fields such as aeronautics, civil engineering, nuclear industry... The main issue is to determine if the adhesive joint is "good" or not. Up to date, nobody is able to discern an adhesive from a cohesive joint before fracture. As an example, 10 samples prepared in the same time and same conditions (rougthness, cleaning agent, temperature, humidity...) won't have the same mechanical behaviour. 9 will fail at the presumed load, but one will break before. This study is aimed at exploring potentialities of Time Of Flight Modulation to discern an eventual change in the nonlinear signature of an aluminium/epoxy interface.

Domaines: Mécanique [physics.med-ph]

C. La Rocca, C. Payan, J. Moysan. Evaluation of epoxy bonded joint quality using nonlinear acoustics. XV ICNEM, Jul 2010, Otranto, Italy. ⟨hal-01298603⟩