Mode III interlaminar fracture of carbon/epoxy laminates using the edge crack t...

• Author(s): Alfredo Balacó Morais ; A. B. Pereira ; Marcelo Francisco de Sousa Ferreira de Moura ; A. G. Magalhães
• Date: 2009
• Persistent ID: http://hdl.handle.net/10216/44146
• Origin: Repositório Aberto da Universidade do Porto
• Subject(s): Ciências tecnológicas; Engenharia; Engenharia mecânica
• Document Type: Article
• Language: Portuguese

Description

The modeIIIinterlaminarfractureofcarbon/epoxylaminateswasevaluatedwiththeedgecracktorsion (ECT) test.Three-dimensionalfiniteelementanalyseswereperformedinordertoselecttwospecimen geometries andanexperimentaldatareductionscheme.Testresultsshowedconsiderablenon-linearity before themaximumloadpointandasignificant R-curve effect.Thesefeaturespreventedanaccurate definition oftheinitiationpoint.Nevertheless,analysesofnon-linearityzonesshowedtwolikelyinitia- tion pointscorrespondingto GIIIc values between850and1100J/m2 for bothspecimengeometries. Although anyofthesevaluesisrealistic,therangeistoobroad,thusshowingthelimitationsofthe ECT testandtheneedforfurtherresearch.