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Author(s): A. M. G. Pinto
A. G. Magalhães
R. D. S. G. Campilho
M. F. S. F de Moura
A. P. M. Baptista
Title: Strength prediction and experimental validation of adhesive joints including polyethylene, carbon-epoxy and aluminium adherends
Issue Date: 2009
Abstract: Polyolefins are especially difficult to bond due to their non-polar, non-porous andchemically inert surfaces. Acrylic adhesives used in industry are particularly suited to bond thesematerials, including many grades of polypropylene (PP) and polyethylene (PE), without specialsurface preparation. In this work, the tensile strength of single-lap PE and mixed joints bonded withan acrylic adhesive was investigated. The mixed joints included PE with aluminium (AL) orcarbon-fibre reinforced plastic (CFRP) substrates. The PE substrates were only cleaned withisopropanol, which assured cohesive failures. For the PE-CFRP joints, three different surfacespreparations were employed for the CFRP substrates: cleaning with acetone, abrasion with 100 gritsand paper and peel-ply finishing. In the PE-AL joints, the AL bonding surfaces were prepared bythe following methods: cleaning with acetone, abrasion with 180 and 320 grit sand papers, gritblasting and chemical etching with chromic acid. After abrasion of the CFRP and AL substrates, thesurfaces were always cleaned with acetone. The tensile strengths were compared with numericalresults from ABAQUS® and a mixed-mode (I+II) cohesive damage model. A good agreement wasfound between the experimental and numerical results, except for the PE-AL joints, since the ALsurface treatments were not found to be effective.
Subject: Outras ciências da engenharia e tecnologias
Other engineering and technologies
Scientific areas: Ciências da engenharia e tecnologias::Outras ciências da engenharia e tecnologias
Engineering and technology::Other engineering and technologies
Source: V International Materials Symposium MATERIAIS 2009
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: openAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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