Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.22/8180 |
Resumo: | With the need to find an alternative way to mechanical and welding joints, and at the same time to overcome some limitations linked to these traditional techniques, adhesive bonds can be used. Adhesive bonding is a permanent joining process that uses an adhesive to bond the components of a structure. Composite materials reinforced with fibres are becoming increasingly popular in many applications as a result of a number of competitive advantages. In the manufacture of composite structures, although the fabrication techniques reduce to the minimum by means of advanced manufacturing techniques, the use of connections is still required due to the typical size limitations and design, technological and logistical aspects. Moreover, it is known that in many high performance structures, unions between composite materials with other light metals such as aluminium are required, for purposes of structural optimization. This work deals with the experimental and numerical study of single lap joints (SLJ), bonded with a brittle (Nagase Chemtex Denatite XNRH6823) and a ductile adhesive (Nagase Chemtex Denatite XNR6852). These are applied to hybrid joints between aluminium (AL6082-T651) and carbon fibre reinforced plastic (CFRP; Texipreg HS 160 RM) adherends in joints with different overlap lengths (LO) under a tensile loading. The Finite Element (FE) Method is used to perform detailed stress and damage analyses allowing to explain the joints’ behaviour and the use of cohesive zone models (CZM) enables predicting the joint strength and creating a simple and rapid design methodology. The use of numerical methods to simulate the behaviour of the joints can lead to savings of time and resources by optimizing the geometry and material parameters of the joints. The joints’ strength and failure modes were highly dependent on the adhesive, and this behaviour was successfully modelled numerically. Using a brittle adhesive resulted in a negligible maximum load (Pm) improvement with LO. The joints bonded with the ductile adhesive showed a nearly linear improvement of Pm with LO. |
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Strength and damage analysis of composite-aluminium adhesively-bonded single-lap jointsHybrid jointsSingle-lap jointCohesive zone modelsStress distributionsDamage analysisJuntas híbridasJuntas de sobreposição simplesModelos de dano coesivoDistribuição de tensõesAnálise de danoConstruções MecânicasWith the need to find an alternative way to mechanical and welding joints, and at the same time to overcome some limitations linked to these traditional techniques, adhesive bonds can be used. Adhesive bonding is a permanent joining process that uses an adhesive to bond the components of a structure. Composite materials reinforced with fibres are becoming increasingly popular in many applications as a result of a number of competitive advantages. In the manufacture of composite structures, although the fabrication techniques reduce to the minimum by means of advanced manufacturing techniques, the use of connections is still required due to the typical size limitations and design, technological and logistical aspects. Moreover, it is known that in many high performance structures, unions between composite materials with other light metals such as aluminium are required, for purposes of structural optimization. This work deals with the experimental and numerical study of single lap joints (SLJ), bonded with a brittle (Nagase Chemtex Denatite XNRH6823) and a ductile adhesive (Nagase Chemtex Denatite XNR6852). These are applied to hybrid joints between aluminium (AL6082-T651) and carbon fibre reinforced plastic (CFRP; Texipreg HS 160 RM) adherends in joints with different overlap lengths (LO) under a tensile loading. The Finite Element (FE) Method is used to perform detailed stress and damage analyses allowing to explain the joints’ behaviour and the use of cohesive zone models (CZM) enables predicting the joint strength and creating a simple and rapid design methodology. The use of numerical methods to simulate the behaviour of the joints can lead to savings of time and resources by optimizing the geometry and material parameters of the joints. The joints’ strength and failure modes were highly dependent on the adhesive, and this behaviour was successfully modelled numerically. Using a brittle adhesive resulted in a negligible maximum load (Pm) improvement with LO. The joints bonded with the ductile adhesive showed a nearly linear improvement of Pm with LO.Com a necessidade de encontrar formas alternativas às juntas mecânicas e soldadas que permitisse ligar componentes de forma mais vantajosa, surgiram as juntas adesivas. Estas caracterizam-se por ser um processo permanente onde é usado um adesivo para unir componentes de uma estrutura que não poderiam ser construídas numa peça só. Materiais compósitos reforçados com fibras estão a ser cada vez mais utilizados nas mais variadas aplicações devido às suas propriedades mecânicas vantajosas quando comparados com os materiais tradicionais de engenharia. Na construção de estruturas em materiais compósitos o uso de ligações continua a ser necessário devido a limitações dimensionais, tecnológicas e logísticas. Para além disso, é necessária a combinação de materiais compósitos com ligas de alumínio para otimização estrutural. Este trabalho refere-se ao estudo de juntas de sobreposição simples ligadas com dois tipos de adesivos, um adesivo considerado frágil (Nagase Chemtex Denatite XNRH6823) e um considerado dúctil (Nagase Chemtex Denatite XNR6852). Estes foram aplicados em juntas híbridas entre uma liga de alumínio (AL6082-T651) e um material compósito reforçado com fibra de carbono (Texipreg HS 160 RM) em juntas com diferentes valores de sobreposição sendo sujeitos a um ensaio de tração. Foi efetuada uma análise experimental, cujos resultados foram comparados posteriormente com uma análise numérica. O Método de Elementos Finitos foi usado para realizar uma análise de tensões e dano, e a resistência das juntas foi prevista por Modelos de Dano Coesivo. O uso de modelos numéricos permite a redução de tempos de projeto e otimização da estrutura. O comportamento das juntas foi corretamente modelado numericamente e concluiu-se que a resistência da junta e modos de rotura dependem do tipo de adesivo. A aproximação numérica demonstrou ser bastante precisa, sendo que o adesivo frágil teve resultados mais aproximados da realidade quando comparados com os resultados do adesivo dúctil.Campilho, Raul Duarte Salgueiral GomesRepositório Científico do Instituto Politécnico do PortoRibeiro, Tiago Emanuel Andrade2016-05-03T14:22:27Z201520152015-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.22/8180TID:201162563enginfo: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:RCAAP2023-03-13T12:48:52Zoai:recipp.ipp.pt:10400.22/8180Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:28:35.955099Repositório 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 |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
title |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
spellingShingle |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints Ribeiro, Tiago Emanuel Andrade Hybrid joints Single-lap joint Cohesive zone models Stress distributions Damage analysis Juntas híbridas Juntas de sobreposição simples Modelos de dano coesivo Distribuição de tensões Análise de dano Construções Mecânicas |
title_short |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
title_full |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
title_fullStr |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
title_full_unstemmed |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
title_sort |
Strength and damage analysis of composite-aluminium adhesively-bonded single-lap joints |
author |
Ribeiro, Tiago Emanuel Andrade |
author_facet |
Ribeiro, Tiago Emanuel Andrade |
author_role |
author |
dc.contributor.none.fl_str_mv |
Campilho, Raul Duarte Salgueiral Gomes Repositório Científico do Instituto Politécnico do Porto |
dc.contributor.author.fl_str_mv |
Ribeiro, Tiago Emanuel Andrade |
dc.subject.por.fl_str_mv |
Hybrid joints Single-lap joint Cohesive zone models Stress distributions Damage analysis Juntas híbridas Juntas de sobreposição simples Modelos de dano coesivo Distribuição de tensões Análise de dano Construções Mecânicas |
topic |
Hybrid joints Single-lap joint Cohesive zone models Stress distributions Damage analysis Juntas híbridas Juntas de sobreposição simples Modelos de dano coesivo Distribuição de tensões Análise de dano Construções Mecânicas |
description |
With the need to find an alternative way to mechanical and welding joints, and at the same time to overcome some limitations linked to these traditional techniques, adhesive bonds can be used. Adhesive bonding is a permanent joining process that uses an adhesive to bond the components of a structure. Composite materials reinforced with fibres are becoming increasingly popular in many applications as a result of a number of competitive advantages. In the manufacture of composite structures, although the fabrication techniques reduce to the minimum by means of advanced manufacturing techniques, the use of connections is still required due to the typical size limitations and design, technological and logistical aspects. Moreover, it is known that in many high performance structures, unions between composite materials with other light metals such as aluminium are required, for purposes of structural optimization. This work deals with the experimental and numerical study of single lap joints (SLJ), bonded with a brittle (Nagase Chemtex Denatite XNRH6823) and a ductile adhesive (Nagase Chemtex Denatite XNR6852). These are applied to hybrid joints between aluminium (AL6082-T651) and carbon fibre reinforced plastic (CFRP; Texipreg HS 160 RM) adherends in joints with different overlap lengths (LO) under a tensile loading. The Finite Element (FE) Method is used to perform detailed stress and damage analyses allowing to explain the joints’ behaviour and the use of cohesive zone models (CZM) enables predicting the joint strength and creating a simple and rapid design methodology. The use of numerical methods to simulate the behaviour of the joints can lead to savings of time and resources by optimizing the geometry and material parameters of the joints. The joints’ strength and failure modes were highly dependent on the adhesive, and this behaviour was successfully modelled numerically. Using a brittle adhesive resulted in a negligible maximum load (Pm) improvement with LO. The joints bonded with the ductile adhesive showed a nearly linear improvement of Pm with LO. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015 2015 2015-01-01T00:00:00Z 2016-05-03T14:22:27Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.22/8180 TID:201162563 |
url |
http://hdl.handle.net/10400.22/8180 |
identifier_str_mv |
TID:201162563 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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