Resistência ao choque da madeira de Platanus x acerifolia em diferentes condições de umidade

Beltrame, Rafael; Mattos, Bruno D.; Gatto, Darci Alberto; Lazarotto, Marília; Haselein, Clóvis Roberto

doi:10.1590/s0100-67622013000400020

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Sendo assim, fica evidenciada uma maior absorção de impacto para a vassoura vermelha em comparação com a P. americana. Beltrame et al (2013), em estudos com Platanus x acerifolia com massa específica aparente de 0,68 g.cm -3 , apresentou valor de Fbw 48,32 KJ.m -2 bem menor que o encontrado no presente estudo. Tabela 2.…”

Section: Resultsunclassified

CARACTERIZAÇÃO FÍSICO-MECÂNICA DA MADEIRA DE Dodonaea viscosa Jacq.

Souza

Oliveira

Gorski

et al. 2022

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O uso da madeira de espécies nativas pode ser visto como alternativa de renda para produtores rurais, no entanto ainda existe uma grande lacuna a ser preenchida pelas instituições de pesquisa a respeito das características dessa a fim de embasar sua utilização. Neste sentido, o presente estudo objetivou caracterizar as propriedades físico-mecânicas da madeira de Dodonaea viscosa Jacq. Para tanto, foram utilizadas neste estudo exemplares da espécie Dodanaea viscosa, conhecida popularmente como faxina vermelha ou vassoura-vermelha, com aproximadamente quinze anos de idade. Os corpos de prova foram confeccionados seguindo as dimensões descritas nas respectivas normas de cada ensaio. Após a confecção, os mesmos foram acondicionados em câmara climatizada a uma temperatura de 20°C e 65% de umidade relativa, onde permaneceram até atingirem umidade de equilíbrio de 12%. Posteriormente, foram avaliados: massa específica aparente, flexão estática, flexão dinâmica e dureza Janka. A partir dos resultados obtidos neste estudo, pode-se perceber que a madeira de Dodonaea viscosa pode ser classificada como de alta densidade, possui bom desempenho nas propriedades mecânicas, como módulo de ruptura, módulo de elasticidade, dureza Janka e resistência ao impacto. Além disso, apresenta alto valor de cota dinâmica, caracterizando-a como uma madeira resiliente.

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Section: Resultsunclassified

CARACTERIZAÇÃO FÍSICO-MECÂNICA DA MADEIRA DE Dodonaea viscosa Jacq.

Souza

Oliveira

Gorski

et al. 2022

BIOFIX

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“…According to IPT (2019), M. itauba has a small number of thin rays that provide greater resistance in this section. However, according to Beltrame et al (2013), factors such as anatomy, dimension of the pieces, specific mass and slope of the grain negatively influence the wood in shear tests. In addition, woods with higher proportions of latewood and adult have greater resistance in the tangential section, corroborating the results obtained for these lots, since the wood comes from forests managed with a selection of mature trees for cutting.…”

Section: Discussionmentioning

confidence: 99%

TECHNOLOGICAL CHARACTERIZATION OF Mezilaurus itauba WOOD: APPLICATION AND MACHINING TESTS

Rodrigues

Barbosa

Dreyer

et al. 2020

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Brazil has several forest species that can be used for sustainable wood production. However, finding materials with technological quality is still a challenge. Wood is an excellent building material, however, there are few studies that have investigated the technological characterization, machining and processing of these species, including Mezilaurus itauba (Meisn.) Taub. Ex Mez. Thus, this study aimed to evaluate the technical characteristics and application potential of M. itauba wood from two distinct commercial lots, by analyzing its mechanical properties and performing machining tests. For this, static bending, dynamics and machining tests were carried out. The perpendicular compression tests of the evaluated fibers presented mean values of 9899.77 Mpa and 10670.74 Mpa for the elasticity module of lot 1 and lot 2, respectively. The average value observed for the L1 rupture module was 96.02 Mpa, while for L2 it was 113.85 Mpa. For the shear tests, low variation was observed between the specimens as well as between the evaluated lots. As for machining tests, M. itauba wood was classified as excellent for manufacturing furniture and internal openings. The M. itauba lots have acceptable mechanical strength, and the density is indicated for structural works, as well as for manufacturing furniture and interiors.

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“…Wood drying is a transformative procedure that serves to reduce the moisture content within the wood, effectively removing both free and bound water present within lumens and cell walls, ultimately yielding seasoned timber. The wood moisture content worsens the mechanical properties (Engelund et al 2013;Beltrame et al 2013) and can cause defects such as cracks and warping (Rebolledo et al 2013), making wood drying an essential process. Drying in uences various attributes, including dimensional stability, hygroscopicity reduction, enhanced coating and adhesive compatibility, improved mechanical properties (Muñoz & Moya 2008), and resistance against insectpest attacks (Batista et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Advancing Wood Quality with Convective Vacuum Drying and its Influence on Multiple Properties of Mangifera Indica L. Timber

Pathak,

Upreti

2024

Preprint

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This study looks into the effects of convective vacuum drying on the timber quality of Mangifera indica L. timber, focusing on drying rate, drying time, and mechanical, physical, and anatomical properties. Convective vacuum drying significantly reduced the moisture content of mango wood from 93.10% to 8–12% within approximately 99 hours, enhancing its physical and mechanical properties. The process yielded wood with no visual defects, increased basic density, reduced volumetric shrinkage, and improved mechanical strength metrics such as modulus of elasticity and rupture. Anatomical changes included reductions in vessel and fiber dimensions. The improvements observed suggest that convective vacuum drying is a useful technique for improving the quality of M. indica L. wood, increasing its suitability for a range of industrial uses.

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Resistência ao choque da madeira de Platanus x acerifolia em diferentes condições de umidade

Cited by 4 publications

References 5 publications

CARACTERIZAÇÃO FÍSICO-MECÂNICA DA MADEIRA DE Dodonaea viscosa Jacq.

CARACTERIZAÇÃO FÍSICO-MECÂNICA DA MADEIRA DE Dodonaea viscosa Jacq.

TECHNOLOGICAL CHARACTERIZATION OF Mezilaurus itauba WOOD: APPLICATION AND MACHINING TESTS

Advancing Wood Quality with Convective Vacuum Drying and its Influence on Multiple Properties of Mangifera Indica L. Timber

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