Tensile behaviour of three-dimensional carbon-epoxy adhesively bonded single- a...

• Author(s): Raul Duarte Salgueiral Gomes Campilho ; Marcelo Francisco de Sousa Ferreira de Moura ; Dimitra Ramantani ; José J. L. Morais ; J. Sabino Domingues
• Date: 2009
• Persistent ID: http://hdl.handle.net/10216/15135
• Origin: Repositório Aberto da Universidade do Porto
• Subject(s): Ciências tecnológicas; Engenharia; Engenharia mecânica
• Document Type: Article
• Language: Portuguese

Description

An experimentalandnumericalstudyofthetensilebehaviourofthree-dimensionalcarbon-epoxy adhesivelybondedstraprepairsispresented.Experimentally,thefailuremode,elasticstiffnessand strength wereevaluatedfordifferentoverlaplengthsandpatchthicknesses.Thenumericalsimulations, performedinABAQUSs, allowedobtainingtheelasticstiffnessandthepatchdebondingload,usedto understandtherepairsbehaviour.Theadhesivelayerwassimulatedwithcohesiveelementsincludinga mixed-modecohesivedamagemodelwithtrapezoidaltraction-separationlawsinpuremodesIandII, to accountfortheductilebehaviouroftheadhesiveused.Theselawsweredeterminedbyaninverse method,whichconsistsontheestimationofthecohesiveparameterswithafittingprocedureofthe experimentalandnumericalload–displacementcurvesoftherespectivefracturecharacterizationtest. The puremodeIIIcohesivelawwasequalledtothepuremodeIIone.Thisnumericalmetho