Fracture toughness determination of adhesive and co-cured joints in natural fibre composites

Detalhes bibliográficos
Autor(a) principal: Campilho, Raul
Data de Publicação: 2013
Outros Autores: Moura, Daniel, Gonçalves, Daniel J. S., Silva, João, Banea, Mariana D., Silva, Lucas F. M. da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.22/3443
Resumo: Adhesive bonding has become more efficient in the last few decades due to the adhesives developments, granting higher strength and ductility. On the other hand, natural fibre composites have recently gained interest due to the low cost and density. It is therefore essential to predict the fracture behavior of joints between these materials, to assess the feasibility of joining or repairing with adhesives. In this work, the tensile fracture toughness (Gc n) of adhesive joints between natural fibre composites is studied, by bonding with a ductile adhesive and co-curing. Conventional methods to obtain Gc n are used for the co-cured specimens, while for the adhesive within the bonded joint, the J-integral is considered. For the J-integral calculation, an optical measurement method is developed for the evaluation of the crack tip opening and adherends rotation at the crack tip during the test, supported by a Matlab sub-routine for the automated extraction of these quantities. As output of this work, an optical method that allows an easier and quicker extraction of the parameters to obtain Gc n than the available methods is proposed (by the J-integral technique), and the fracture behaviour in tension of bonded and co-cured joints in jute-reinforced natural fibre composites is also provided for the subsequent strength prediction. Additionally, for the adhesively- bonded joints, the tensile cohesive law of the adhesive is derived by the direct method.
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spelling Fracture toughness determination of adhesive and co-cured joints in natural fibre compositesFibresFracture toughnessDamage mechanicsJoiningAdhesive bonding has become more efficient in the last few decades due to the adhesives developments, granting higher strength and ductility. On the other hand, natural fibre composites have recently gained interest due to the low cost and density. It is therefore essential to predict the fracture behavior of joints between these materials, to assess the feasibility of joining or repairing with adhesives. In this work, the tensile fracture toughness (Gc n) of adhesive joints between natural fibre composites is studied, by bonding with a ductile adhesive and co-curing. Conventional methods to obtain Gc n are used for the co-cured specimens, while for the adhesive within the bonded joint, the J-integral is considered. For the J-integral calculation, an optical measurement method is developed for the evaluation of the crack tip opening and adherends rotation at the crack tip during the test, supported by a Matlab sub-routine for the automated extraction of these quantities. As output of this work, an optical method that allows an easier and quicker extraction of the parameters to obtain Gc n than the available methods is proposed (by the J-integral technique), and the fracture behaviour in tension of bonded and co-cured joints in jute-reinforced natural fibre composites is also provided for the subsequent strength prediction. Additionally, for the adhesively- bonded joints, the tensile cohesive law of the adhesive is derived by the direct method.ElsevierRepositório Científico do Instituto Politécnico do PortoCampilho, RaulMoura, DanielGonçalves, Daniel J. S.Silva, JoãoBanea, Mariana D.Silva, Lucas F. M. da2014-01-23T11:38:25Z20132013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.22/3443eng1359-836810.1016/j.compositesb.2013.01.025info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-13T12:43:14Zoai:recipp.ipp.pt:10400.22/3443Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:24:25.630179Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
title Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
spellingShingle Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
Campilho, Raul
Fibres
Fracture toughness
Damage mechanics
Joining
title_short Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
title_full Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
title_fullStr Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
title_full_unstemmed Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
title_sort Fracture toughness determination of adhesive and co-cured joints in natural fibre composites
author Campilho, Raul
author_facet Campilho, Raul
Moura, Daniel
Gonçalves, Daniel J. S.
Silva, João
Banea, Mariana D.
Silva, Lucas F. M. da
author_role author
author2 Moura, Daniel
Gonçalves, Daniel J. S.
Silva, João
Banea, Mariana D.
Silva, Lucas F. M. da
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Politécnico do Porto
dc.contributor.author.fl_str_mv Campilho, Raul
Moura, Daniel
Gonçalves, Daniel J. S.
Silva, João
Banea, Mariana D.
Silva, Lucas F. M. da
dc.subject.por.fl_str_mv Fibres
Fracture toughness
Damage mechanics
Joining
topic Fibres
Fracture toughness
Damage mechanics
Joining
description Adhesive bonding has become more efficient in the last few decades due to the adhesives developments, granting higher strength and ductility. On the other hand, natural fibre composites have recently gained interest due to the low cost and density. It is therefore essential to predict the fracture behavior of joints between these materials, to assess the feasibility of joining or repairing with adhesives. In this work, the tensile fracture toughness (Gc n) of adhesive joints between natural fibre composites is studied, by bonding with a ductile adhesive and co-curing. Conventional methods to obtain Gc n are used for the co-cured specimens, while for the adhesive within the bonded joint, the J-integral is considered. For the J-integral calculation, an optical measurement method is developed for the evaluation of the crack tip opening and adherends rotation at the crack tip during the test, supported by a Matlab sub-routine for the automated extraction of these quantities. As output of this work, an optical method that allows an easier and quicker extraction of the parameters to obtain Gc n than the available methods is proposed (by the J-integral technique), and the fracture behaviour in tension of bonded and co-cured joints in jute-reinforced natural fibre composites is also provided for the subsequent strength prediction. Additionally, for the adhesively- bonded joints, the tensile cohesive law of the adhesive is derived by the direct method.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-01-01T00:00:00Z
2014-01-23T11:38:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.22/3443
url http://hdl.handle.net/10400.22/3443
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1359-8368
10.1016/j.compositesb.2013.01.025
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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