Mechanical properties of the macaw palm fruit-rachilla system
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 di...
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Universidade Federal de Goiás
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doaj-22fbd66022674ec3afe02f6a6733c17a2020-11-24T22:40:03ZengUniversidade Federal de Goiás Pesquisa Agropecuária Tropical1983-40632017-06-0147221822510.1590/1983-40632016v4745792 Mechanical properties of the macaw palm fruit-rachilla systemNara Silveira Velloso0Fábio Lúcio Santos1Francisco de Assis de Carvalho Pinto2Flora Maria de Melo Villar3Domingos Sárvio Magalhães Valente4Universidade Federal de Lavras, Departamento de Engenharia, Lavras, MG, Brazil.Universidade Federal de Lavras, Departamento de Engenharia, Lavras, MG, Brazil.Universidade Federal de Viçosa, Departamento de Engenharia Agrícola, Viçosa, MG, Brazil.Universidade Federal de Viçosa, Departamento de Engenharia Agrícola, Viçosa, MG, Brazil.Universidade Federal de Viçosa, Departamento de Engenharia Agrícola, Viçosa, MG, Brazil.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.https://www.revistas.ufg.br/pat/article/view/45792/23422Acrocomia aculeatabiodieseldamping ratioPoisson's ratio |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nara Silveira Velloso Fábio Lúcio Santos Francisco de Assis de Carvalho Pinto Flora Maria de Melo Villar Domingos Sárvio Magalhães Valente |
spellingShingle |
Nara Silveira Velloso Fábio Lúcio Santos Francisco de Assis de Carvalho Pinto Flora Maria de Melo Villar Domingos Sárvio Magalhães Valente Mechanical properties of the macaw palm fruit-rachilla system Pesquisa Agropecuária Tropical Acrocomia aculeata biodiesel damping ratio Poisson's ratio |
author_facet |
Nara Silveira Velloso Fábio Lúcio Santos Francisco de Assis de Carvalho Pinto Flora Maria de Melo Villar Domingos Sárvio Magalhães Valente |
author_sort |
Nara Silveira Velloso |
title |
Mechanical properties of the macaw palm fruit-rachilla system |
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 |
publisher |
Universidade Federal de Goiás |
series |
Pesquisa Agropecuária Tropical |
issn |
1983-4063 |
publishDate |
2017-06-01 |
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. |
topic |
Acrocomia aculeata biodiesel damping ratio Poisson's ratio |
url |
https://www.revistas.ufg.br/pat/article/view/45792/23422 |
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