Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFU |
Texto Completo: | https://repositorio.ufu.br/handle/123456789/14781 https://doi.org/10.14393/ufu.te.2016.46 |
Resumo: | In this work small and large-scale wear tests of polyurethane (PU) sliding against polyamide (PA) were carried out. In the large-scale tests, PU and PA samples were submitted to conditions similar to those found in oil and gas platform operations. The wear of these samples was measured using a coordinate measuring machine. Using the small-scale test configuration, the influence of contact geometry, sliding velocity, sliding stroke and contact pressure at the coefficient of friction (COF) and on the wear mechanisms was evaluated. In both test scales, the wear mechanisms of PA and PU samples were analyzed using a scanning electron microscope. The thermal behavior of PA samples was investigated using differential scanning calorimetry. The PA physic-chemical analysis was performed using X-ray diffraction and Raman spectroscopy and infrared spectroscopy for PU. In large-scale tests was observed that the outer cover of flexible riser pipes had a maximum wear rate of 0.016 mm/km, while in the liner this wear rate was 0.264 mm/km. It was also observed that variations in the hardness of PU liner lead to an important change on the wear mechanisms and, consequently, on the wear rate. The wear rate at large-scale was also strongly affected by the contact temperature. Due to the reduction of the contact temperature, a sharp reduction on the liner wear rate was observed. However, no significant variation in the rate of wear of PA riser cover was noticed. In small-scales tests, under the same sliding velocity and contact pressure observed in the field, the tribological wear behavior was changed. It was also observed that increasing the contact pressure or reducing the sliding stroke leads to a decrease the COF, while the sliding velocity only induced a change in this parameter if the contact temperature was significantly increased. Using test parameters in small scale which lead to a temperature rise in the tribocontact, it was possible to reproduce the tribological behavior observed in large-scale test. |
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Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveisTribological behavior of elastomeric polyurethane sliding against polyamide 11 external layer of flexible risers pipesPUPADesgaste por deslizamentoDutos flexíveisEnrijecedoresTribologiaMateriais - Processos de fabricaçãoPolímerosWear by slidingFlexible risers pipersBend stiffenersCNPQ::ENGENHARIAS::ENGENHARIA MECANICAIn this work small and large-scale wear tests of polyurethane (PU) sliding against polyamide (PA) were carried out. In the large-scale tests, PU and PA samples were submitted to conditions similar to those found in oil and gas platform operations. The wear of these samples was measured using a coordinate measuring machine. Using the small-scale test configuration, the influence of contact geometry, sliding velocity, sliding stroke and contact pressure at the coefficient of friction (COF) and on the wear mechanisms was evaluated. In both test scales, the wear mechanisms of PA and PU samples were analyzed using a scanning electron microscope. The thermal behavior of PA samples was investigated using differential scanning calorimetry. The PA physic-chemical analysis was performed using X-ray diffraction and Raman spectroscopy and infrared spectroscopy for PU. In large-scale tests was observed that the outer cover of flexible riser pipes had a maximum wear rate of 0.016 mm/km, while in the liner this wear rate was 0.264 mm/km. It was also observed that variations in the hardness of PU liner lead to an important change on the wear mechanisms and, consequently, on the wear rate. The wear rate at large-scale was also strongly affected by the contact temperature. Due to the reduction of the contact temperature, a sharp reduction on the liner wear rate was observed. However, no significant variation in the rate of wear of PA riser cover was noticed. In small-scales tests, under the same sliding velocity and contact pressure observed in the field, the tribological wear behavior was changed. It was also observed that increasing the contact pressure or reducing the sliding stroke leads to a decrease the COF, while the sliding velocity only induced a change in this parameter if the contact temperature was significantly increased. Using test parameters in small scale which lead to a temperature rise in the tribocontact, it was possible to reproduce the tribological behavior observed in large-scale test.Doutor em Engenharia MecânicaNeste trabalho foram realizados ensaios tribológicos envolvendo o par poliuretano (PU) e poliamida (PA) em escala real e reduzida. Nos ensaios em escala real, os materiais foram submetidos a condições similares às observadas em plataformas de óleo e gás. O desgaste destas amostras foi avaliado utilizando uma máquina de medir por coordenadas. Nos ensaios em escala reduzida foram avaliados os efeitos da geometria do contato, da velocidade de deslizamento, da amplitude de deslizamento e da pressão de contato sobre o coeficiente de atrito (COF), bem como sobre os mecanismos de desgaste. Para as amostras de ambas as escalas, os mecanismos de desgaste da PA e do PU foram observados através de microscopia eletrônica de varredura. O comportamento térmico das amostras de PA foi investigado através da calorimetria exploratória diferencial. A análise físico-química foi realizada utilizando difração de raios-x e espectroscopia Raman para a PA e a espectroscopia no infravermelho para o PU. Nos ensaios em escala real foi observado que as capas dos dutos flexíveis têm uma taxa de desgaste máxima de 0,016 mm/km, enquanto no liner essa taxa foi de 0,264 mm/km. Observou-se também que variações na dureza do PU do liner levaram a uma importante alteração dos mecanismos atuantes e, consequentemente, da taxa de desgaste. Essa taxa de desgaste foi também fortemente influenciada pela temperatura no contato. Essas alterações foram verificadas mediante a introdução de afastamentos periódicos entre os corpos durante o teste. Neste caso, o desgaste do liner foi mínimo. Todavia, a PA da capa externa não apresentou variação significativa na taxa de desgaste. Nos ensaios em escala reduzida, sob mesmas condições de velocidade e pressão observadas em campo, não foi obtida a mesma resposta tribológica. Notou-se também que o aumento da pressão ou redução da amplitude de deslizamento reduz o COF, enquanto a velocidade somente alterou este parâmetro caso houvesse uma alteração significativa da temperatura no contato. Mediante a utilização de parâmetros de teste na escala reduzida que levavam ao aumento da temperatura no contato, foi possível reproduzir o comportamento tribológico observado em escala real.2021-02-282021-02-22Universidade Federal de UberlândiaBRPrograma de Pós-graduação em Engenharia MecânicaEngenhariasUFUFranco, Sinésio Domingueshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4786105Z3Arencibia, Rosenda Valdeshttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4768031U8Silva Junior, Washington Martins dahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4769549P2Milan, Júlio César Giubileihttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4707312P4Ambrósio, José Donatohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4709014Z7Bertholdi, Jonas2016-06-22T18:39:51Z2016-05-302016-06-22T18:39:51Z2016-03-16info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfapplication/pdfBERTHOLDI, Jonas. Tribological behavior of elastomeric polyurethane sliding against polyamide 11 external layer of flexible risers pipes. 2016. 252 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2016. DOI https://doi.org/10.14393/ufu.te.2016.46https://repositorio.ufu.br/handle/123456789/14781https://doi.org/10.14393/ufu.te.2016.46porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFUinstname:Universidade Federal de Uberlândia (UFU)instacron:UFU2023-01-19T19:30:25Zoai:repositorio.ufu.br:123456789/14781Repositório InstitucionalONGhttp://repositorio.ufu.br/oai/requestdiinf@dirbi.ufu.bropendoar:2023-01-19T19:30:25Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU)false |
dc.title.none.fl_str_mv |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis Tribological behavior of elastomeric polyurethane sliding against polyamide 11 external layer of flexible risers pipes |
title |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis |
spellingShingle |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis Bertholdi, Jonas PU PA Desgaste por deslizamento Dutos flexíveis Enrijecedores Tribologia Materiais - Processos de fabricação Polímeros Wear by sliding Flexible risers pipers Bend stiffeners CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
title_short |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis |
title_full |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis |
title_fullStr |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis |
title_full_unstemmed |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis |
title_sort |
Comportamento tribológico de poliuretanos elastoméricos no desgaste por deslizamento contra capa de poliamida 11 de dutos flexíveis |
author |
Bertholdi, Jonas |
author_facet |
Bertholdi, Jonas |
author_role |
author |
dc.contributor.none.fl_str_mv |
Franco, Sinésio Domingues http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4786105Z3 Arencibia, Rosenda Valdes http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4768031U8 Silva Junior, Washington Martins da http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4769549P2 Milan, Júlio César Giubilei http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4707312P4 Ambrósio, José Donato http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4709014Z7 |
dc.contributor.author.fl_str_mv |
Bertholdi, Jonas |
dc.subject.por.fl_str_mv |
PU PA Desgaste por deslizamento Dutos flexíveis Enrijecedores Tribologia Materiais - Processos de fabricação Polímeros Wear by sliding Flexible risers pipers Bend stiffeners CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
topic |
PU PA Desgaste por deslizamento Dutos flexíveis Enrijecedores Tribologia Materiais - Processos de fabricação Polímeros Wear by sliding Flexible risers pipers Bend stiffeners CNPQ::ENGENHARIAS::ENGENHARIA MECANICA |
description |
In this work small and large-scale wear tests of polyurethane (PU) sliding against polyamide (PA) were carried out. In the large-scale tests, PU and PA samples were submitted to conditions similar to those found in oil and gas platform operations. The wear of these samples was measured using a coordinate measuring machine. Using the small-scale test configuration, the influence of contact geometry, sliding velocity, sliding stroke and contact pressure at the coefficient of friction (COF) and on the wear mechanisms was evaluated. In both test scales, the wear mechanisms of PA and PU samples were analyzed using a scanning electron microscope. The thermal behavior of PA samples was investigated using differential scanning calorimetry. The PA physic-chemical analysis was performed using X-ray diffraction and Raman spectroscopy and infrared spectroscopy for PU. In large-scale tests was observed that the outer cover of flexible riser pipes had a maximum wear rate of 0.016 mm/km, while in the liner this wear rate was 0.264 mm/km. It was also observed that variations in the hardness of PU liner lead to an important change on the wear mechanisms and, consequently, on the wear rate. The wear rate at large-scale was also strongly affected by the contact temperature. Due to the reduction of the contact temperature, a sharp reduction on the liner wear rate was observed. However, no significant variation in the rate of wear of PA riser cover was noticed. In small-scales tests, under the same sliding velocity and contact pressure observed in the field, the tribological wear behavior was changed. It was also observed that increasing the contact pressure or reducing the sliding stroke leads to a decrease the COF, while the sliding velocity only induced a change in this parameter if the contact temperature was significantly increased. Using test parameters in small scale which lead to a temperature rise in the tribocontact, it was possible to reproduce the tribological behavior observed in large-scale test. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-06-22T18:39:51Z 2016-05-30 2016-06-22T18:39:51Z 2016-03-16 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
BERTHOLDI, Jonas. Tribological behavior of elastomeric polyurethane sliding against polyamide 11 external layer of flexible risers pipes. 2016. 252 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2016. DOI https://doi.org/10.14393/ufu.te.2016.46 https://repositorio.ufu.br/handle/123456789/14781 https://doi.org/10.14393/ufu.te.2016.46 |
identifier_str_mv |
BERTHOLDI, Jonas. Tribological behavior of elastomeric polyurethane sliding against polyamide 11 external layer of flexible risers pipes. 2016. 252 f. Tese (Doutorado em Engenharias) - Universidade Federal de Uberlândia, Uberlândia, 2016. DOI https://doi.org/10.14393/ufu.te.2016.46 |
url |
https://repositorio.ufu.br/handle/123456789/14781 https://doi.org/10.14393/ufu.te.2016.46 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Uberlândia BR Programa de Pós-graduação em Engenharia Mecânica Engenharias UFU |
publisher.none.fl_str_mv |
Universidade Federal de Uberlândia BR Programa de Pós-graduação em Engenharia Mecânica Engenharias UFU |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFU instname:Universidade Federal de Uberlândia (UFU) instacron:UFU |
instname_str |
Universidade Federal de Uberlândia (UFU) |
instacron_str |
UFU |
institution |
UFU |
reponame_str |
Repositório Institucional da UFU |
collection |
Repositório Institucional da UFU |
repository.name.fl_str_mv |
Repositório Institucional da UFU - Universidade Federal de Uberlândia (UFU) |
repository.mail.fl_str_mv |
diinf@dirbi.ufu.br |
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1805569584422453248 |