Reliable adhesion failure qualification of metal-adhesive-metal assemblies using pulsed thermography

Alban Morel; Marc Genest

doi:10.1117/12.2663360

12 June 2023 Reliable adhesion failure qualification of metal-adhesive-metal assemblies using pulsed thermography

Alban Morel, Marc Genest

Proceedings Volume 12536, Thermosense: Thermal Infrared Applications XLV; 125360C (2023) https://doi.org/10.1117/12.2663360
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

The growth of application using multi-material assemblies in the transportation industry has resulted in structural adhesive becoming increasingly used. These assemblies, in addition to be subjected to mechanical stresses, are also exposed to harsh environments throughout the life of vehicles with temperature variations, high humidity and exposure to de-icing salts and fluids. While such assemblies are tested for mechanical strength and fatigue resistance, it is also critical to identify the failure mode of adhesive bonds to ensure that proper actions are taken to prevent catastrophic failure. Despite the obvious need to qualify the adhesive failure modes, this task is typically relegated to a semi-quantitative analysis of cohesive/adhesive failure ratios based on the visual inspection of an experienced eye, which along with the use of adhesives of various colors, inevitably introduces variability in the qualifying process. Moreover, the characterization of adhesive performance typically involves analysing hundreds of coupons and while the general failure types are known: bulk of the adhesive (cohesive failure), substrate/adhesive interface (adhesive failure) and near-interface; quantification on each coupon suffers from inaccuracy and better means are needed. In this work, we introduce the use of pulsed thermography (PT) as a repeatable and objective solution to quantify failure modes of metal-adhesive-metal assemblies by harnessing the fundamental differences in thermal properties of the two materials. It is shown that the inspection performed in through transmission mode allows for the distinction of the various adhesion failures.

Conference Presentation

Citation Download Citation

Alban Morel and Marc Genest "Reliable adhesion failure qualification of metal-adhesive-metal assemblies using pulsed thermography", Proc. SPIE 12536, Thermosense: Thermal Infrared Applications XLV, 125360C (12 June 2023); https://doi.org/10.1117/12.2663360

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available