Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/8681 |
Resumo: | The aim of the present research was to evaluate the physical and mechanical properties of LVL reinforced with fiberglass with two types of resins. Pinus elliottii veneers with 1,5 mm thickness were used to manufacture of the LVL panels. The panels were manufactured in two steps. The first one was the assembling of the LVL panels with nine layers of wood veneer glued with phenol-formaldehyde resin. The second step consisted into reinforcing the LVL with fiberglass impregnated with epoxy resin (E) or isophthalic resin (I). The treatments were: panels without reinforcement (T), panels reinforced with one fiberglass layer (E T1 e I T1), panels reinforced with two fiberglass layers (E T2 e I T2) and panels reinforced with four fiberglass layers (E T3 e I T3). The size of panel was 45 cm x 34 cm x 1,08 cm. The physical properties tested were density and moisture content. The mechanical properties tested were: static bending in flatwise and edgewise position, modulus of elasticity (MOE) and modulus of rupture (MOR); glueline shear strength by compression loading; hardness test; and non-destructive test by ultrasound method. The epoxy and the isophthalic resin showed similar mechanical performance among the different treatments.The resistence and stiffness of the panels were influenced by the reinforcement. The MOE in flatwise position was influenced by one reinforcement layer and the MOR was influenced by two reinforcement layers. In the edgewise position the MOE and the MOR values remained constant among the treatments with two fiberglass reinforcement layers. The MOE in nondestructive test had higher values when compared with the destructive method, however these values remained stable with two layers of reinforcement. Two layers of reinforcement on the tensile and compression side had higher values in hardness test. The epoxy resin presented higher glueline resistence and higher percentage of wood failure. Isophthalic and phenolic resin presented similar values of glueline strenght, however the isophthalic resin had lower percentage of wood failure. Thus, the reinforcement with one layer of fiberglass imprenated with epoxy resin on the tensile side would be enough to promote the mechanical qualities of LVL. |
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Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidroPhysical and mechanical characteristics of laminated veneer lumber reinforced with fiberglassLVLFibra de vidroResina epóxiResina isoftálicaFiberglassEpoxy resinIsophthalic resinWood veneerCNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTALThe aim of the present research was to evaluate the physical and mechanical properties of LVL reinforced with fiberglass with two types of resins. Pinus elliottii veneers with 1,5 mm thickness were used to manufacture of the LVL panels. The panels were manufactured in two steps. The first one was the assembling of the LVL panels with nine layers of wood veneer glued with phenol-formaldehyde resin. The second step consisted into reinforcing the LVL with fiberglass impregnated with epoxy resin (E) or isophthalic resin (I). The treatments were: panels without reinforcement (T), panels reinforced with one fiberglass layer (E T1 e I T1), panels reinforced with two fiberglass layers (E T2 e I T2) and panels reinforced with four fiberglass layers (E T3 e I T3). The size of panel was 45 cm x 34 cm x 1,08 cm. The physical properties tested were density and moisture content. The mechanical properties tested were: static bending in flatwise and edgewise position, modulus of elasticity (MOE) and modulus of rupture (MOR); glueline shear strength by compression loading; hardness test; and non-destructive test by ultrasound method. The epoxy and the isophthalic resin showed similar mechanical performance among the different treatments.The resistence and stiffness of the panels were influenced by the reinforcement. The MOE in flatwise position was influenced by one reinforcement layer and the MOR was influenced by two reinforcement layers. In the edgewise position the MOE and the MOR values remained constant among the treatments with two fiberglass reinforcement layers. The MOE in nondestructive test had higher values when compared with the destructive method, however these values remained stable with two layers of reinforcement. Two layers of reinforcement on the tensile and compression side had higher values in hardness test. The epoxy resin presented higher glueline resistence and higher percentage of wood failure. Isophthalic and phenolic resin presented similar values of glueline strenght, however the isophthalic resin had lower percentage of wood failure. Thus, the reinforcement with one layer of fiberglass imprenated with epoxy resin on the tensile side would be enough to promote the mechanical qualities of LVL.Conselho Nacional de Desenvolvimento Científico e TecnológicoO objetivo desta pesquisa foi avaliar as propriedades físico-mecânicas de painéis de lâminas paralelas (LVL) reforçadas com camadas de fibra de vidro inpregnadas com dois tipos de matrizes. Lâminas de madeira de Pinus ellliottii com espessura de 1,5 mm foram utilizadas na fabricação dos painéis. A montagem dos painéis foi realizada em duas etapas. A primeira consistiu na fabricação dos painéis LVL com nove camadas de lâminas de madeira unidas com resina à base de fenol-formaldeído na gramatura de 190 g/m2 em linha simples. E a segunda etapa consistiu na aplicação do reforço de fibra de vidro impregnado com resinas epóxi (E) ou poliéster isoftálica com NPG (I). Os tratamentos utilizados foram: painéis sem reforços (T), painéis com uma camada de fibra de vidro (E T1 e I T1), painéis com duas camadas de fibra de vidro, sendo uma camada no lado de compressão e uma camada no lado de tração (E T2 e I T2) e painéis com quatro camadas de fibra de vidro, duas camadas do lado de compressão e duas camadas no lado de tração separados por uma lâmina de madeira (E T3 e I T3). Foram realizadas três repetições por tratamento, totalizando 21 painéis. As dimensões finais dos painéis foram 45 cm x 34 cm x 1,08 cm. Para determinar a qualidade dos painéis LVL foram avaliadas as propriedades físicas (massa específica e teor de umidade) e a resistência mecânica (flexão estática na posição flatwise e egdewise, resistência ao cisalhamento, dureza Janka e teste não destrutivo utilizando ultrassom). A resina epóxi e a resina isoftálica apresentaram as mesmas qualidades mecânicas nos diferentes tratamentos. A aplicação do reforço influenciou na resistência e na rigidez do painel. Na flexão estática na posição flatwise o módulo de elasticidade (MOE) foi influenciado por uma camada de reforço e o módulo de ruptura (MOR) por duas camadas de reforço. Na posição edgewise os valores de MOE e do MOR se mantiveram estáveis com a aplicação de duas camadas de reforços de fibra de vidro. O MOE pelo método ultrassônico apresentou valores maiores quando comparado com o método estático; em ambos os métodos os valores mantiveram-se estáveis com a aplicação de duas camadas de reforço. A dureza Janka foi maior para as painéis com mais camadas de fibra de vidro na posição de tração e compressão. A resina epóxi apresentou maior resistência ao cisalhamento e maior percentual de falhas na madeira, enquanto que a resina isoftálica, apesar de apresentar valores de resistência similares à fenólica, não apresentou boa adesão à madeira, representada pelo baixo percentual de falhas na madeira. A aplicação de uma camada de reforço de fibra de vidro com resina epóxi na posição de tração seria o suficiente para melhorar as qualidades mecânicas dos painéis LVL fabricados com lâminas de madeira de pinus unidas com fenol-formaldeído.Universidade Federal de Santa MariaBRRecursos Florestais e Engenharia FlorestalUFSMPrograma de Pós-Graduação em Engenharia FlorestalHaselein, Clovis Robertohttp://lattes.cnpq.br/5522749609471065Hillig, Évertonhttp://lattes.cnpq.br/5240619272740210Gatto, Darci Albertohttp://lattes.cnpq.br/0592339091520248Lopes, Merielen de Carvalhohttp://lattes.cnpq.br/5880864267022266Buligon, Ediane Andreia2011-10-282011-10-282011-07-18info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfBULIGON, Ediane Andreia. PHYSICAL AND MECHANICAL CHARACTERISTICS OF LAMINATED VENEER LUMBER REINFORCED WITH FIBERGLASS. 2011. 99 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2011.http://repositorio.ufsm.br/handle/1/8681porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-01-05T14:43:15Zoai:repositorio.ufsm.br:1/8681Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-01-05T14:43:15Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro Physical and mechanical characteristics of laminated veneer lumber reinforced with fiberglass |
title |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro |
spellingShingle |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro Buligon, Ediane Andreia LVL Fibra de vidro Resina epóxi Resina isoftálica Fiberglass Epoxy resin Isophthalic resin Wood veneer CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
title_short |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro |
title_full |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro |
title_fullStr |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro |
title_full_unstemmed |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro |
title_sort |
Características físico-mecânicas de painéis de lâminas paralelas reforçados com fibra de vidro |
author |
Buligon, Ediane Andreia |
author_facet |
Buligon, Ediane Andreia |
author_role |
author |
dc.contributor.none.fl_str_mv |
Haselein, Clovis Roberto http://lattes.cnpq.br/5522749609471065 Hillig, Éverton http://lattes.cnpq.br/5240619272740210 Gatto, Darci Alberto http://lattes.cnpq.br/0592339091520248 Lopes, Merielen de Carvalho http://lattes.cnpq.br/5880864267022266 |
dc.contributor.author.fl_str_mv |
Buligon, Ediane Andreia |
dc.subject.por.fl_str_mv |
LVL Fibra de vidro Resina epóxi Resina isoftálica Fiberglass Epoxy resin Isophthalic resin Wood veneer CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
topic |
LVL Fibra de vidro Resina epóxi Resina isoftálica Fiberglass Epoxy resin Isophthalic resin Wood veneer CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL |
description |
The aim of the present research was to evaluate the physical and mechanical properties of LVL reinforced with fiberglass with two types of resins. Pinus elliottii veneers with 1,5 mm thickness were used to manufacture of the LVL panels. The panels were manufactured in two steps. The first one was the assembling of the LVL panels with nine layers of wood veneer glued with phenol-formaldehyde resin. The second step consisted into reinforcing the LVL with fiberglass impregnated with epoxy resin (E) or isophthalic resin (I). The treatments were: panels without reinforcement (T), panels reinforced with one fiberglass layer (E T1 e I T1), panels reinforced with two fiberglass layers (E T2 e I T2) and panels reinforced with four fiberglass layers (E T3 e I T3). The size of panel was 45 cm x 34 cm x 1,08 cm. The physical properties tested were density and moisture content. The mechanical properties tested were: static bending in flatwise and edgewise position, modulus of elasticity (MOE) and modulus of rupture (MOR); glueline shear strength by compression loading; hardness test; and non-destructive test by ultrasound method. The epoxy and the isophthalic resin showed similar mechanical performance among the different treatments.The resistence and stiffness of the panels were influenced by the reinforcement. The MOE in flatwise position was influenced by one reinforcement layer and the MOR was influenced by two reinforcement layers. In the edgewise position the MOE and the MOR values remained constant among the treatments with two fiberglass reinforcement layers. The MOE in nondestructive test had higher values when compared with the destructive method, however these values remained stable with two layers of reinforcement. Two layers of reinforcement on the tensile and compression side had higher values in hardness test. The epoxy resin presented higher glueline resistence and higher percentage of wood failure. Isophthalic and phenolic resin presented similar values of glueline strenght, however the isophthalic resin had lower percentage of wood failure. Thus, the reinforcement with one layer of fiberglass imprenated with epoxy resin on the tensile side would be enough to promote the mechanical qualities of LVL. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-10-28 2011-10-28 2011-07-18 |
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 |
BULIGON, Ediane Andreia. PHYSICAL AND MECHANICAL CHARACTERISTICS OF LAMINATED VENEER LUMBER REINFORCED WITH FIBERGLASS. 2011. 99 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/8681 |
identifier_str_mv |
BULIGON, Ediane Andreia. PHYSICAL AND MECHANICAL CHARACTERISTICS OF LAMINATED VENEER LUMBER REINFORCED WITH FIBERGLASS. 2011. 99 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2011. |
url |
http://repositorio.ufsm.br/handle/1/8681 |
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 Santa Maria BR Recursos Florestais e Engenharia Florestal UFSM Programa de Pós-Graduação em Engenharia Florestal |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Recursos Florestais e Engenharia Florestal UFSM Programa de Pós-Graduação em Engenharia Florestal |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
_version_ |
1805922166204530688 |