Test method to assess interface adhesion in composite bonding

Test method to assess interface adhesion in composite bonding

Teixeira de Freitas, S.
Sinke, J.

Aerospace Engineering

Aerospace Structures & Materials

2015-03-24

This paper introduces a new type of peel tests dedicated to composite bonding: Composite Peel Tests. This test is inspired on the standard floating roller peel test widely used for metal bonding. The aim of this study is to investigate the potential of the Composite Peel Test to assess interface adhesion in composite bonded structures. To this end, peel tests were performed with nine different types of adhesives and at two environmental temperatures, room temperature and +80°C. The results were compared with the standard floating roller peel tests with Aluminium adherends. The results show that when using the Composite Peel Test good interface adhesion results either in cohesive failure of the adhesive or intra-laminar failure of the composite, while bad adhesion results in adhesive failure. In most cases of good interface adhesion, increasing the temperature favors cohesive failure of the adhesive in detriment of intra-laminar failure of the composite. Peel strengths can be used as a quality indicator of interface adhesion only if using exactly the same type of flexible adherend (peeling-off member). Nevertheless, if cohesive failure is the dominant failure mode, the comparison between adhesives’ peel strength is consistent disregarding of the type of peel-off adherend. Composite Peel Tests are suitable to assess interface adhesion of composite bonded structures.

peel tests
composites
adhesion
interface
composite bonding
OA-Fund TU Delft

http://resolver.tudelft.nl/uuid:abd45057-1120-4b33-9e45-b4adad598964

https://doi.org/10.1186/s40563-015-0033-5

BioMed Central

2196-4351

http://www.appliedadhesionscience.com/content/3/1/9

Applied Adhesion Science, 3, 2015

Institutional Repository

journal article

© 2015 The Author(s)
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.