Study on the role of laser surface irradiation on damage and decohesion of Al/epoxy joints

Marco Alfano, Gilles Lubineau, Franco Furgiuele, Glaucio H. Paulino

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

In this work we investigate the effect of laser irradiation on the bond toughness of aluminum/epoxy bonded joints. The evolution of substrate surface morphology and wettability, for various sets of laser process parameters (i.e. laser power, line spacing, scan speed), was investigated by means of Scanning Electron Microscopy (SEM) and contact angle measurements. A proper combination of power, line spacing and scan speed was then selected and adhesive bonded Al/epoxy T-peel joints were prepared and tested. For comparison, similar samples were produced using substrates with classical grit blasting surface treatment. Finally, post-failure SEM analyses of fracture surfaces were performed, and in order to typify the increase in bond toughness of the joints, finite element simulations were carried out using a potential based cohesive zone model of fracture.

Original languageEnglish (US)
Pages (from-to)33-41
Number of pages9
JournalInternational Journal of Adhesion and Adhesives
Volume39
DOIs
StatePublished - Dec 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biomaterials
  • Chemical Engineering(all)
  • Polymers and Plastics

Keywords

  • Contact angle
  • Epoxy
  • Fracture
  • Surface treatment

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