Image processing methodology for assessment of drilling induced damage in CFRP

Detalhes bibliográficos
Autor(a) principal: Silva, Duarte Nuno Rodrigues da
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/9866
Resumo: Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica
id RCAP_7b0ad3231d4eaa936d0f86f1a0b45852
oai_identifier_str oai:run.unl.pt:10362/9866
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Image processing methodology for assessment of drilling induced damage in CFRPCarbon fibre reinforced plasticsDelaminationNDTX-RadiographyImage processingThresholdDissertação para obtenção do Grau de Mestre em Engenharia MecânicaComposite material components are produced in a near final shape. Machining operations such as drilling are often indispensable, namely for joining of structures. This process introduces damage along the periphery of the hole. Different methods to reduce this induced damage were developed. However, difficulties arise when comparing them since delamination is irregular in shape and in size. The delamination factor and the adjusted delamination factor quantify the damage but none achieved full acceptance since no international standards have been set. The aim of this work is to develop an image processing methodology associated with digital radiography that is capable of assessing the drilling induced damage in CFRP, being easily reproducible and allowing comparison of different drilling approaches. The subtraction of pre and post drill radiographies defined the target image to reach. In the image processing the threshold was found to be the most influential variable causing significant changes to the delamination factors. A new approach to the delamination factor is proposed in order to characterize the drilling induced damage. This approach allows the minimization of the quantified damage for the most irregular delamination shapes while equalling the current delamination factors for regular (crown like) damages.Faculdade de Ciências e TecnologiaRUNSilva, Duarte Nuno Rodrigues da2013-06-11T14:25:46Z20132013-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/9866enginfo: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:RCAAP2024-03-11T03:43:14Zoai:run.unl.pt:10362/9866Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:19:05.504981Repositório 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 Image processing methodology for assessment of drilling induced damage in CFRP
title Image processing methodology for assessment of drilling induced damage in CFRP
spellingShingle Image processing methodology for assessment of drilling induced damage in CFRP
Silva, Duarte Nuno Rodrigues da
Carbon fibre reinforced plastics
Delamination
NDT
X-Radiography
Image processing
Threshold
title_short Image processing methodology for assessment of drilling induced damage in CFRP
title_full Image processing methodology for assessment of drilling induced damage in CFRP
title_fullStr Image processing methodology for assessment of drilling induced damage in CFRP
title_full_unstemmed Image processing methodology for assessment of drilling induced damage in CFRP
title_sort Image processing methodology for assessment of drilling induced damage in CFRP
author Silva, Duarte Nuno Rodrigues da
author_facet Silva, Duarte Nuno Rodrigues da
author_role author
dc.contributor.none.fl_str_mv RUN
dc.contributor.author.fl_str_mv Silva, Duarte Nuno Rodrigues da
dc.subject.por.fl_str_mv Carbon fibre reinforced plastics
Delamination
NDT
X-Radiography
Image processing
Threshold
topic Carbon fibre reinforced plastics
Delamination
NDT
X-Radiography
Image processing
Threshold
description Dissertação para obtenção do Grau de Mestre em Engenharia Mecânica
publishDate 2013
dc.date.none.fl_str_mv 2013-06-11T14:25:46Z
2013
2013-01-01T00:00:00Z
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/10362/9866
url http://hdl.handle.net/10362/9866
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
dc.publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799137835116134400

Registros relacionados