Mechanical properties of the macaw palm fruit-rachilla system
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Agropecuária Tropical (Online) |
Texto Completo: | https://revistas.ufg.br/pat/article/view/45792 |
Resumo: | The fruit of the native macaw palm [Acrocomia aculeata (lacq) Lood. ex Mart] is an alternative for biodiesel production because of the plant characteristics, as well as its adaptability, hardiness and high vegetable oil yield. However, its exploitation remains extractive and there are significant difficulties in its harvest. This study aimed to determine the mechanical properties of the macaw palm fruit-rachilla system that will support the design of harvest machines based on mechanical vibration. Ten samples of four accessions in the immature and mature stages of maturity were used. Traction and vibration tests were conducted to determine the mechanical properties of the macaw palm fruit-rachilla system. The elastic modulus of the rachilla was 188.39-385.09 MPa for the immature stage and 109.02-320.54 MPa for the mature stage. The Poisson’s ratio for the rachilla varied between 0.20 and 0.52 for the immature stage and between 0.16 and 0.52 for the mature stage. The damping ratio varied between 0.02 and 0.12 for the immature stage and between 0.06 and 0.12 for the mature stage. The fruit-rachilla system was characterized as underdamped. |
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Mechanical properties of the macaw palm fruit-rachilla systemPropriedades mecânicas do sistema fruto-ráquila de macaúbaAcrocomia aculeatabiodieseldamping ratioPoisson’s ratio.Acrocomia aculeatabiodieselrazão de amortecimentorazão de Poisson.The fruit of the native macaw palm [Acrocomia aculeata (lacq) Lood. ex Mart] is an alternative for biodiesel production because of the plant characteristics, as well as its adaptability, hardiness and high vegetable oil yield. However, its exploitation remains extractive and there are significant difficulties in its harvest. This study aimed to determine the mechanical properties of the macaw palm fruit-rachilla system that will support the design of harvest machines based on mechanical vibration. Ten samples of four accessions in the immature and mature stages of maturity were used. Traction and vibration tests were conducted to determine the mechanical properties of the macaw palm fruit-rachilla system. The elastic modulus of the rachilla was 188.39-385.09 MPa for the immature stage and 109.02-320.54 MPa for the mature stage. The Poisson’s ratio for the rachilla varied between 0.20 and 0.52 for the immature stage and between 0.16 and 0.52 for the mature stage. The damping ratio varied between 0.02 and 0.12 for the immature stage and between 0.06 and 0.12 for the mature stage. The fruit-rachilla system was characterized as underdamped.O fruto da palmeira nativa macaúba [Acrocomia aculeata (lacq) Lood. ex Mart] é uma alternativa para a produção de biodiesel devido às características da planta, como sua adaptabilidade, rusticidade e alta produção de óleo vegetal. Contudo, sua exploração ainda é extrativista e há grandes dificuldades em sua colheita. Objetivou-se determinar as propriedades mecânicas do sistema fruto-ráquila de macaúba que servirão de suporte aos projetos de máquinas para colheita por vibração mecânica. Foram utilizadas dez amostras de quatro acessos, nos estádios de maturação imaturo e maduro. Ensaios de tração e vibração foram realizados para determinar as propriedades mecânicas do sistema fruto-ráquila. O módulo de elasticidade obtido para a ráquila foi de 188,39-385,09 MPa para o estádio imaturo e 109,02-320,54 MPa para o maduro. A razão de Poisson para a ráquila ficou entre 0,20 e 0,52 para o estádio imaturo e entre 0,16 e 0,52 para o maduro. A razão de amortecimento encontrada variou entre 0,02 e 0,12 para o estádio imaturo e entre 0,06 e 0,12 para o maduro. O sistema fruto-ráquila foi caracterizado como subamortecido.Escola de Agronomia - Universidade Federal de Goiás2017-07-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionAvaliado por paresapplication/pdfhttps://revistas.ufg.br/pat/article/view/45792Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 47, n. 2, Apr./Jun. 2017; 218-225Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 47, n. 2, abr./jun. 2017; 218-225Pesquisa Agropecuária Tropical; v. 47, n. 2, abr./jun. 2017; 218-2251983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGenghttps://revistas.ufg.br/pat/article/view/45792/23422Copyright (c) 2017 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)info:eu-repo/semantics/openAccessVelloso, Nara SilveiraSantos, Fábio LúcioPinto, Francisco de Assis de CarvalhoVillar, Flora Maria de MeloValente, Domingos Sárvio Magalhães2020-07-13T18:39:22Zoai:ojs.revistas.ufg.br:article/45792Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2024-05-21T19:56:16.772558Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)true |
dc.title.none.fl_str_mv |
Mechanical properties of the macaw palm fruit-rachilla system Propriedades mecânicas do sistema fruto-ráquila de macaúba |
title |
Mechanical properties of the macaw palm fruit-rachilla system |
spellingShingle |
Mechanical properties of the macaw palm fruit-rachilla system Velloso, Nara Silveira Acrocomia aculeata biodiesel damping ratio Poisson’s ratio. Acrocomia aculeata biodiesel razão de amortecimento razão de Poisson. |
title_short |
Mechanical properties of the macaw palm fruit-rachilla system |
title_full |
Mechanical properties of the macaw palm fruit-rachilla system |
title_fullStr |
Mechanical properties of the macaw palm fruit-rachilla system |
title_full_unstemmed |
Mechanical properties of the macaw palm fruit-rachilla system |
title_sort |
Mechanical properties of the macaw palm fruit-rachilla system |
author |
Velloso, Nara Silveira |
author_facet |
Velloso, Nara Silveira Santos, Fábio Lúcio Pinto, Francisco de Assis de Carvalho Villar, Flora Maria de Melo Valente, Domingos Sárvio Magalhães |
author_role |
author |
author2 |
Santos, Fábio Lúcio Pinto, Francisco de Assis de Carvalho Villar, Flora Maria de Melo Valente, Domingos Sárvio Magalhães |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Velloso, Nara Silveira Santos, Fábio Lúcio Pinto, Francisco de Assis de Carvalho Villar, Flora Maria de Melo Valente, Domingos Sárvio Magalhães |
dc.subject.por.fl_str_mv |
Acrocomia aculeata biodiesel damping ratio Poisson’s ratio. Acrocomia aculeata biodiesel razão de amortecimento razão de Poisson. |
topic |
Acrocomia aculeata biodiesel damping ratio Poisson’s ratio. Acrocomia aculeata biodiesel razão de amortecimento razão de Poisson. |
description |
The fruit of the native macaw palm [Acrocomia aculeata (lacq) Lood. ex Mart] is an alternative for biodiesel production because of the plant characteristics, as well as its adaptability, hardiness and high vegetable oil yield. However, its exploitation remains extractive and there are significant difficulties in its harvest. This study aimed to determine the mechanical properties of the macaw palm fruit-rachilla system that will support the design of harvest machines based on mechanical vibration. Ten samples of four accessions in the immature and mature stages of maturity were used. Traction and vibration tests were conducted to determine the mechanical properties of the macaw palm fruit-rachilla system. The elastic modulus of the rachilla was 188.39-385.09 MPa for the immature stage and 109.02-320.54 MPa for the mature stage. The Poisson’s ratio for the rachilla varied between 0.20 and 0.52 for the immature stage and between 0.16 and 0.52 for the mature stage. The damping ratio varied between 0.02 and 0.12 for the immature stage and between 0.06 and 0.12 for the mature stage. The fruit-rachilla system was characterized as underdamped. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-07-25 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Avaliado por pares |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufg.br/pat/article/view/45792 |
url |
https://revistas.ufg.br/pat/article/view/45792 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://revistas.ufg.br/pat/article/view/45792/23422 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2017 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2017 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 47, n. 2, Apr./Jun. 2017; 218-225 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 47, n. 2, abr./jun. 2017; 218-225 Pesquisa Agropecuária Tropical; v. 47, n. 2, abr./jun. 2017; 218-225 1983-4063 reponame:Pesquisa Agropecuária Tropical (Online) instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Pesquisa Agropecuária Tropical (Online) |
collection |
Pesquisa Agropecuária Tropical (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
aseleguini.pat@gmail.com||mgoes@agro.ufg.br |
_version_ |
1799874819798335488 |