Behavior of ultrasonic waves in in wood with presence of holes
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/14154 |
Resumo: | This work aimed to analyze the pattern of variation in wave lengths in presence of wood holes and to develop a model capable of describing the process. To attain that end, wood pieces were used from species pequiá (Aspidosperma desmanthum), on which circular and linear artificial holes were made and gradually enlarged. Ultrasonic tests were performed using USLab equipment and 45 kHz transducers. Measurements were taken first on the intact piece and then after each stage of artificial hole enlargement. Results demonstrated that propagation velocities of ultrasonic waves are affected by presence of holes and also that reduction in velocity is caused by changes in wave path, since waves tend to deviate from empty space and travel through matter. The circular hole type had a slightly stronger influence on velocity reduction than the linear hole type. Variation in velocity as a function of increasing percentage of hollow space relative to the intact piece can be represented by a linear model. |
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Behavior of ultrasonic waves in in wood with presence of holesComportamento de ondas de ultrassom na presença de ocos na madeiraAspidosperma desmanthumWave lengthAcoustic methodForest sectorPequiáPercurso da ondaMétodo acústicoSetor florestalThis work aimed to analyze the pattern of variation in wave lengths in presence of wood holes and to develop a model capable of describing the process. To attain that end, wood pieces were used from species pequiá (Aspidosperma desmanthum), on which circular and linear artificial holes were made and gradually enlarged. Ultrasonic tests were performed using USLab equipment and 45 kHz transducers. Measurements were taken first on the intact piece and then after each stage of artificial hole enlargement. Results demonstrated that propagation velocities of ultrasonic waves are affected by presence of holes and also that reduction in velocity is caused by changes in wave path, since waves tend to deviate from empty space and travel through matter. The circular hole type had a slightly stronger influence on velocity reduction than the linear hole type. Variation in velocity as a function of increasing percentage of hollow space relative to the intact piece can be represented by a linear model.Neste trabalho, objetivou-se estudar o comportamento da variação do percurso da onda em presença de oco na madeira bem como elaborar um modelo que o descrevesse. Para atingir esse objetivo, foram utilizadas peças de madeira da espécie pequiá (Aspidosperma desmanthum) nos quais foram confeccionados orifícios artificiais (circular e linear). Esses orifícios foram sendo aumentados gradualmente. Os ensaios de ultrassom foram realizados utilizando equipamento da marca USLab e transdutores de 45 kHz. As medições foram realizadas na peça íntegra e após cada fase de confecção do oco artificial. Os resultados permitiram confirmar que as velocidades de propagação de ondas de ultrassom são afetadas pela presença de ocos e que a redução da velocidade é provocada pela mudança de percurso da onda, que tende a se desviar do vazio e percorrer o material. O oco do tipo circular teve influência levemente superior na redução da velocidade do que o oco do tipo linear. A variação da velocidade com o aumento da porcentagem de oco em relação à peça integra pode ser representada por um modelo linear.Universidade Federal de Lavras (UFLA)2016-04-052017-08-01T20:13:44Z2017-08-01T20:13:44Z2017-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfSECCO, C. B. et al. Behavior of ultrasonic waves in in wood with presence of holes. CERNE, Lavras, v. 18, n. 3, p. 507-514, jul./set. 2012.http://repositorio.ufla.br/jspui/handle/1/141542317-63420104-7760reponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttp://www.cerne.ufla.br/site/index.php/CERNE/article/view/849/628Copyright (c) 2016 CERNEhttp://creativecommons.org/licenses/by/4.0/Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccessSecco, Chiara BarrosGonçalves, RaquelCerri, Domingos Guilherme PelegrinoVasques, Érica CarolineBatista, Fernando Augusto Franco2021-07-28T21:04:40Zoai:localhost:1/14154Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-07-28T21:04:40Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Behavior of ultrasonic waves in in wood with presence of holes Comportamento de ondas de ultrassom na presença de ocos na madeira |
title |
Behavior of ultrasonic waves in in wood with presence of holes |
spellingShingle |
Behavior of ultrasonic waves in in wood with presence of holes Secco, Chiara Barros Aspidosperma desmanthum Wave length Acoustic method Forest sector Pequiá Percurso da onda Método acústico Setor florestal |
title_short |
Behavior of ultrasonic waves in in wood with presence of holes |
title_full |
Behavior of ultrasonic waves in in wood with presence of holes |
title_fullStr |
Behavior of ultrasonic waves in in wood with presence of holes |
title_full_unstemmed |
Behavior of ultrasonic waves in in wood with presence of holes |
title_sort |
Behavior of ultrasonic waves in in wood with presence of holes |
author |
Secco, Chiara Barros |
author_facet |
Secco, Chiara Barros Gonçalves, Raquel Cerri, Domingos Guilherme Pelegrino Vasques, Érica Caroline Batista, Fernando Augusto Franco |
author_role |
author |
author2 |
Gonçalves, Raquel Cerri, Domingos Guilherme Pelegrino Vasques, Érica Caroline Batista, Fernando Augusto Franco |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Secco, Chiara Barros Gonçalves, Raquel Cerri, Domingos Guilherme Pelegrino Vasques, Érica Caroline Batista, Fernando Augusto Franco |
dc.subject.por.fl_str_mv |
Aspidosperma desmanthum Wave length Acoustic method Forest sector Pequiá Percurso da onda Método acústico Setor florestal |
topic |
Aspidosperma desmanthum Wave length Acoustic method Forest sector Pequiá Percurso da onda Método acústico Setor florestal |
description |
This work aimed to analyze the pattern of variation in wave lengths in presence of wood holes and to develop a model capable of describing the process. To attain that end, wood pieces were used from species pequiá (Aspidosperma desmanthum), on which circular and linear artificial holes were made and gradually enlarged. Ultrasonic tests were performed using USLab equipment and 45 kHz transducers. Measurements were taken first on the intact piece and then after each stage of artificial hole enlargement. Results demonstrated that propagation velocities of ultrasonic waves are affected by presence of holes and also that reduction in velocity is caused by changes in wave path, since waves tend to deviate from empty space and travel through matter. The circular hole type had a slightly stronger influence on velocity reduction than the linear hole type. Variation in velocity as a function of increasing percentage of hollow space relative to the intact piece can be represented by a linear model. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-05 2017-08-01T20:13:44Z 2017-08-01T20:13:44Z 2017-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
SECCO, C. B. et al. Behavior of ultrasonic waves in in wood with presence of holes. CERNE, Lavras, v. 18, n. 3, p. 507-514, jul./set. 2012. http://repositorio.ufla.br/jspui/handle/1/14154 |
identifier_str_mv |
SECCO, C. B. et al. Behavior of ultrasonic waves in in wood with presence of holes. CERNE, Lavras, v. 18, n. 3, p. 507-514, jul./set. 2012. |
url |
http://repositorio.ufla.br/jspui/handle/1/14154 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://www.cerne.ufla.br/site/index.php/CERNE/article/view/849/628 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2016 CERNE http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2016 CERNE http://creativecommons.org/licenses/by/4.0/ Attribution 4.0 International |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) |
publisher.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) |
dc.source.none.fl_str_mv |
2317-6342 0104-7760 reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835168420921344 |