Buckling Behaviour of Carbon–Epoxy Adhesively-Bonded Scarf Repairs

• Autor(es): Raul Duarte Salgueiral Gomes Campilho ; Marcelo Francisco de Sousa Ferreira de Moura ; Dimitra Ramantani ; J. J. L. Morais ; J. Sabino Domingues
• Data: 2009
• Identificador Persistente: http://hdl.handle.net/10216/15144
• Origem: Repositório Aberto da Universidade do Porto
• Assunto(s): Ciências tecnológicas; Engenharia; Engenharia mecânica
• Tipo de Documento: Artigo
• Idioma: Português

Descrição

The presentworkisdedicatedtotheexperimentalandnumericalstudyofthebucklingbehaviourunderpure compression ofcarbon–epoxyadhesively-bondedscarfrepairs,withscarfanglesvaryingfrom2to45◦. The experimentalresultswereusedtovalidateanumericalmethodologyusingtheFiniteElementMethod and amixed-modecohesivedamagemodelimplementedintheABAQUS® software.Theadhesivelayer wassimulatedusingcohesiveelementswithtrapezoidaltraction–separationlawsinpuremodesIandIIto account fortheductilityoftheadhesiveused.ThecohesivelawsinpuremodesIandIIweredetermined with DoubleCantileverBeamandEnd-NotchedFlexuretests,respectively,usinganinversemethod.Since in theexperimentsinterlaminarandtransverseintralaminarfailuresalsooccurred,cohesivelawstosimulate these failuremodeswerealsoobtainedexperimentallyfollowingasimilarprocedure.Goodcorrelations were foundbetweenthenumericalpredictionsandexperimentalresultsfortheelasticstiffness,maximum load andthecorrespondingdisplacement,plateaudisplacementandfailuremodeoftherepairs.