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An experimental analysis of the fracture behavior of composite bonded joints in terms of cohesive laws

Modeling adhesive joints by means of cohesive models relies on the definition of cohesive laws. Although cohesive laws are known to be dependent on the loading mode, there is a lack of experimental evidences to describe this dependence. At the same time, the adherend and adhesive thicknesses are known to affect the fracture toughness of the bond, but their effect on the cohesive law has not been clarified. In this work, an experimental characterization of an epoxy adhesive is presented. The effect that the mode mixity has on the bond toughness and its cohesive law is compared against the effect of the adhesive and adherend thicknesses. The impact of these two latest parameters is shown to be minor if compared to the influence of the mode mixity, which mainly defines the cohesive law shape. Finally, the implications of these experimental findings on the numerical simulation of adhesive joints are discussed

The first author would like to acknowledge the FPU program grant AP2010-0977 from the Spanish Ministerio de Educación, Cultura y Deporte. The authors also acknowledge the support of the Spanish Government through the Ministerio de Economía y Competitividad under the contracts DPI2012-34465 and MAT2012-37552-C03-03

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Author: Sarrado Molina, Carlos
Turon Travesa, Albert
Costa i Balanzat, Josep
Renart Canalias, Jordi
Abstract: Modeling adhesive joints by means of cohesive models relies on the definition of cohesive laws. Although cohesive laws are known to be dependent on the loading mode, there is a lack of experimental evidences to describe this dependence. At the same time, the adherend and adhesive thicknesses are known to affect the fracture toughness of the bond, but their effect on the cohesive law has not been clarified. In this work, an experimental characterization of an epoxy adhesive is presented. The effect that the mode mixity has on the bond toughness and its cohesive law is compared against the effect of the adhesive and adherend thicknesses. The impact of these two latest parameters is shown to be minor if compared to the influence of the mode mixity, which mainly defines the cohesive law shape. Finally, the implications of these experimental findings on the numerical simulation of adhesive joints are discussed
The first author would like to acknowledge the FPU program grant AP2010-0977 from the Spanish Ministerio de Educación, Cultura y Deporte. The authors also acknowledge the support of the Spanish Government through the Ministerio de Economía y Competitividad under the contracts DPI2012-34465 and MAT2012-37552-C03-03
Format: application/pdf
Document access: http://hdl.handle.net/10256/12723
Language: eng
Publisher: Elsevier
Collection: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.compositesa.2016.07.004
info:eu-repo/semantics/altIdentifier/issn/1359-835X
info:eu-repo/grantAgreement/MINECO//DPI2012-34465/ES/EVALUACION DE COMPOSITES LAMINADOS DE CAPAS FINAS PARA APLICACIONES AERONAUTICAS Y AEROESPACIALES/
info:eu-repo/grantAgreement/MINECO//MAT2012-37552-C03-03/ES/COMPUESTOS MULTIFUNCIONALES Y TOLERANTES AL DAÑO: INTEGRACION DE NANOREFUERZOS DE CARBONO AVANZADOS Y LAMINADOS NO-CONVENCIONALES./
Rights: Tots els drets reservats
Subject: Adhesius
Adhesives
Compostos polimèrics
Polymeric composites
Mecànica de fractura
Fracture mechanics
Resistència de materials
Strength of materials
Assaigs de materials
Materials -- Testing
Title: An experimental analysis of the fracture behavior of composite bonded joints in terms of cohesive laws
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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