INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Engenharia Agrícola |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200238 |
Resumo: | ABSTRACT This research aimed to evaluate the effect of the number of fatigue cycles (NC, 0 – reference, 450, 4500, 45000, and 90000) for frequencies (Fr) of oscillation equal to 0.5 and 1.0 Hz on the modulus of elasticity (Em) and operating stress (σm) in the static bending of Pinus caribaea wood. Em and σm were determined taking into account three specimens (SPEC) manufactured for reference condition and another three for each of the four NC levels and each Fr level, resulting in 27 SPEC. Sixty experimental determinations were obtained, being the approximate total time of sample exposure to fatigue of 350 hours. The same specimens used to determine Em and σm for the reference condition were also used (via non-destructive tests) to obtain these properties for all fatigue cycles. The frequency and number of cycles significantly influenced both investigated properties. Reductions in Em and σm values were observed after 45000 cycles. The progressive increase in the number of fatigue cycles caused more marked reductions in mechanical properties when compared to the increase in the frequency of oscillation. |
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INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOODfatiguePinus caribaeastatic bendinganalysis of varianceregression modelsABSTRACT This research aimed to evaluate the effect of the number of fatigue cycles (NC, 0 – reference, 450, 4500, 45000, and 90000) for frequencies (Fr) of oscillation equal to 0.5 and 1.0 Hz on the modulus of elasticity (Em) and operating stress (σm) in the static bending of Pinus caribaea wood. Em and σm were determined taking into account three specimens (SPEC) manufactured for reference condition and another three for each of the four NC levels and each Fr level, resulting in 27 SPEC. Sixty experimental determinations were obtained, being the approximate total time of sample exposure to fatigue of 350 hours. The same specimens used to determine Em and σm for the reference condition were also used (via non-destructive tests) to obtain these properties for all fatigue cycles. The frequency and number of cycles significantly influenced both investigated properties. Reductions in Em and σm values were observed after 45000 cycles. The progressive increase in the number of fatigue cycles caused more marked reductions in mechanical properties when compared to the increase in the frequency of oscillation.Associação Brasileira de Engenharia Agrícola2020-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200238Engenharia Agrícola v.40 n.2 2020reponame:Engenharia Agrícolainstname:Associação Brasileira de Engenharia Agrícola (SBEA)instacron:SBEA10.1590/1809-4430-eng.agric.v40n2p238-242/2020info:eu-repo/semantics/openAccessChristoforo,André L.Barbosa,Thaina Q.Almeida,Diego H. dePanzera,Tulio H.Lahr,Francisco A. R.eng2020-04-15T00:00:00Zoai:scielo:S0100-69162020000200238Revistahttp://www.engenhariaagricola.org.br/ORGhttps://old.scielo.br/oai/scielo-oai.phprevistasbea@sbea.org.br||sbea@sbea.org.br1809-44300100-6916opendoar:2020-04-15T00:00Engenharia Agrícola - Associação Brasileira de Engenharia Agrícola (SBEA)false |
dc.title.none.fl_str_mv |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
title |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
spellingShingle |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD Christoforo,André L. fatigue Pinus caribaea static bending analysis of variance regression models |
title_short |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
title_full |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
title_fullStr |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
title_full_unstemmed |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
title_sort |
INFLUENCE OF FATIGUE ON BENDING OF Pinus caribaea WOOD |
author |
Christoforo,André L. |
author_facet |
Christoforo,André L. Barbosa,Thaina Q. Almeida,Diego H. de Panzera,Tulio H. Lahr,Francisco A. R. |
author_role |
author |
author2 |
Barbosa,Thaina Q. Almeida,Diego H. de Panzera,Tulio H. Lahr,Francisco A. R. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Christoforo,André L. Barbosa,Thaina Q. Almeida,Diego H. de Panzera,Tulio H. Lahr,Francisco A. R. |
dc.subject.por.fl_str_mv |
fatigue Pinus caribaea static bending analysis of variance regression models |
topic |
fatigue Pinus caribaea static bending analysis of variance regression models |
description |
ABSTRACT This research aimed to evaluate the effect of the number of fatigue cycles (NC, 0 – reference, 450, 4500, 45000, and 90000) for frequencies (Fr) of oscillation equal to 0.5 and 1.0 Hz on the modulus of elasticity (Em) and operating stress (σm) in the static bending of Pinus caribaea wood. Em and σm were determined taking into account three specimens (SPEC) manufactured for reference condition and another three for each of the four NC levels and each Fr level, resulting in 27 SPEC. Sixty experimental determinations were obtained, being the approximate total time of sample exposure to fatigue of 350 hours. The same specimens used to determine Em and σm for the reference condition were also used (via non-destructive tests) to obtain these properties for all fatigue cycles. The frequency and number of cycles significantly influenced both investigated properties. Reductions in Em and σm values were observed after 45000 cycles. The progressive increase in the number of fatigue cycles caused more marked reductions in mechanical properties when compared to the increase in the frequency of oscillation. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200238 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000200238 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1809-4430-eng.agric.v40n2p238-242/2020 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Engenharia Agrícola |
publisher.none.fl_str_mv |
Associação Brasileira de Engenharia Agrícola |
dc.source.none.fl_str_mv |
Engenharia Agrícola v.40 n.2 2020 reponame:Engenharia Agrícola instname:Associação Brasileira de Engenharia Agrícola (SBEA) instacron:SBEA |
instname_str |
Associação Brasileira de Engenharia Agrícola (SBEA) |
instacron_str |
SBEA |
institution |
SBEA |
reponame_str |
Engenharia Agrícola |
collection |
Engenharia Agrícola |
repository.name.fl_str_mv |
Engenharia Agrícola - Associação Brasileira de Engenharia Agrícola (SBEA) |
repository.mail.fl_str_mv |
revistasbea@sbea.org.br||sbea@sbea.org.br |
_version_ |
1752126274552201216 |