In situ analysis of interfacial damage in adhesively bonded composite joints subjected to various surface pretreatments

Ran Tao, Marco Alfano, Gilles Lubineau

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Secondary bonding of carbon fiber-reinforced polymer (CFRP) using structural adhesives is a promising technology. However, the joint performance can be ultimately affected by surface modifications attained through different surface preparation strategies. Thus, there is still a need for experimental techniques capable of assessing the mechanical properties associated with different surface preparations, and their relation to the damage morphology at initiation. In this work, a refined experimental set-up was used to perform three-point bending tests on miniaturized single-lap composite joints. Such testing configuration features a peel-dominant stress field within the bondline and the possibility to track the evolution of adhesive deformation and damage in situ at the meso-scale using optical microscopy. Epoxy-bonded CFRP joints were evaluated as a function of various surface pretreatments. In situ local observation obtained during mechanical loading provided insights into the detailed mechanisms taking place depending on the surface preparation strategies.
Original languageEnglish (US)
Pages (from-to)216-223
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume116
DOIs
StatePublished - Oct 25 2018

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