Single-Lap Joints of Similar and Dissimilar Adherends Bonded with an Acrylic Ad...

• Autor(es): Arnaldo Manuel Guedes Pinto ; A. G. Magalhães ; Raul Duarte Salgueiral Gomes Campilho ; Marcelo Francisco de Sousa Ferreira de Moura ; António Paulo Monteiro Baptista
• Data: 2009
• Identificador Persistente: http://hdl.handle.net/10216/15188
• Origem: Repositório Aberto da Universidade do Porto
• Assunto(s): Ciências tecnológicas; Engenharia; Engenharia mecânica
• Tipo de Documento: Artigo
• Idioma: Português

Descrição

In this study,thetensilestrengthofsingle-lapjoints(SLJs)betweensimilarand dissimilar adherendsbondedwithanacrylicadhesivewasevaluatedexperimen- tally andnumerically.Theadherendmaterialsincludedpolyethylene(PE),poly- propylene (PP),carbon-epoxy(CFRP),andglass-polyester(GFRP)composites. The followingadherendcombinationsweretested:PE=PE, PE=PP, PE=CFRP, PE=GFRP, PP=PP, CFRP=CFRP, andGFRP=GFRP. Oneoftheobjectivesofthis work wastoassesstheinfluenceoftheadherendsstiffnessonthestrengthofthe joints sinceitsignificantlyaffectsthepeelstressesmagnitudeintheadhesive layer. Theexperimentalresultswerealsousedtovalidateanewmixed-modecohe- sive damagemodeldevelopedtosimulatetheadhesivelayer.Thus,theexperimen- tal resultswerecomparedwithnumericalsimulationsperformedinABAQUS1, including adevelopedmixed-mode(IþII) cohesivedamagemodel,basedonthe indirect useoffracturemechanicsandimplementedwithininterfacefinite elements. Thecohesivelawspresentatrapezoidalshapewithanincreasingstress plateau, toreproducethebehaviouroftheductileadhesiveused.Agoodagreement was foundbetweentheexperimentalandnumericalresults.