Image processing methodology for assessment of drilling induced damage in CFRP
Autor(a) principal: | |
---|---|
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 |