Mestrado em Ciências Florestais
URI Permanente para esta coleção
Nível: Mestrado Acadêmico
Ano de início: 2008
Conceito atual na CAPES: 4
Ato normativo: Ofício N. 39-12/2007/CTC/CCA/CAPES de 31/07/2007 Homologado pelo CNE (Portaria Nº 656 de 22/05/2017) Publicação DOU em 27/07/2017, Seç. 1, Pag. 36.
Periodicidade de seleção: Semestral
Área(s) de concentração: Ciências Florestais
Url do curso: https://cienciasflorestais.ufes.br/pt-br/pos-graduacao/PPGCFL/detalhes-do-curso?id=1424
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Navegando Mestrado em Ciências Florestais por Autor "Alves, Rejane Costa"
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- ItemDesenvolvimento de calços de madeira laminada colada a partir de resíduos de eucalipto(Universidade Federal do Espírito Santo, 2019-02-27) Lopes, Nayara Franzini; Gonçalves, Fabricio Gomes; Pedro Gutemberg de Alcântara Segundinho; Alves, Rejane Costa; Oliveira, José Tarcísio de SilvaTimber dunnage are used as separators between steel plate and metal profiles in the stowage and storage and are currently made up of pieces of solid sawn timber. However, the reduction of the offer of native species wood to and the inability of the reforestation species to provide pieces of wood with good quality to the market led to the use of alternative techniques for better use of wood. Then there is the technique of glued laminated timber (Glulam) which is the gluing of woods from the association of pieces that are selected and arranged with the fibers parallel to each other for gluing using adhesives and pressing, that can to substitute the solid wood. It is known that this technique has a relevant appeal in terms of the potential of use already established in wood structures. So, this work aimed to develop a type of dunnage with the use of the technology of gluing eucalyptus wood waste from sawmills capable of ensure the safe storage and stowage of steel plates and metal profiles. For this, we made a characterization of the physical properties of the wood, determining the apparent density, the moisture content and the shrinkability. The mechanical tests were performed aiming to evaluate the resistance to normal compression to the fibers, the resistance to parallel compression, the shear strength in wood and in the glue line in two conditions of humidity (dry and saturated), besides the delamination test. Non- destructive tests of free transverse vibration, longitudinal vibration and stress wave in the dunnage were performed. Eucalyptus urophylla x grandis wood has good physical properties, which allows its use for making Glulam elements. Results showed a high resistance of the adhesives in the dry condition, not being found the same performance when tested in the saturated condition. Dunnage made of waste presented satisfactory results when compared to the Glulam dunnage made with an entire lamina, being a good substitute for the existing ones.
- ItemEfeito de parâmetros físicos e anatômicos na amplitude de perfuração da haste do Resistógrafo em madeira de Eucalyptus(Universidade Federal do Espírito Santo, 2019-02-27) Jesus, Daiana Souza de; Oliveira, José Tarcísio da Silva; Alves, Rejane Costa; Segundinho, Pedro Gutemberg de A.The non-destructive evaluation methods of wood quality have great benefits because they are fast, low-cost procedures that allow the analysis of wood in different forms (sawing, logging or standing). Among the various non-destructive testing techniques, the Resistograph has stood out by allowing a rapid evaluation of the strength, density and other properties of the wood. The moisture of the wood can have a significant impact on the resistance to drilling and should be considered when guaranteeing the efficiency of the apparatus in the prediction of wood properties. The objective of this work was to evaluate the influence of moisture content, apparent density and wood anatomy on the drilling resistance. Twelve clones of the 6-year-old Eucalyptus grandis x Eucalyptus urophylla hybrid were studied. Five trees were collected per clone, totaling 60 trees, from which were discs that were drilled and analyzed in different moisture conditions. It was observed a slight decrease in the amplitude between the perforated woods in the anhydrous condition and in the hygroscopic equilibrium content, but there was no statistical difference, whereas in the moisture from the saturated fiber point an increase was observed as a function of the increase of the moisture in the wood to full saturation condition. The correlation between drilling resistance perforation amplitude and basic density was r= 0.65 in the anhydrous condition, r= 0.74 in the hygroscopic equilibrium content, r= 0.50 in the fiber saturation point (FSP) and not significant in the saturated wood, so the best moisture content to predict wood density would be those below the FSP. For the fiber anatomy, a moderate correlation was observed between the amplitude and the wall thickness (r= 0.60). The diameter of the lume, therefore, presented negative correlation (r= -0.38) and the fiber length with r= 0.43.
- ItemRELAÇÕES ENTRE ANÉIS DE CRESCIMENTO E PROPRIEDADES FÍSICO-MECÂNICAS DA MADEIRA DE Pinus spp.(Universidade Federal do Espírito Santo, 2020-07-17) Mayard, Raynord; Segundinho, Pedro Gutemberg de Alcantara; https://orcid.org/0000000243938686; http://lattes.cnpq.br/0125088071269647; https://orcid.org/0000000192784479; http://lattes.cnpq.br/; Goncalves, Fabricio Gomes; https://orcid.org/0000000320109508; http://lattes.cnpq.br/0616694853822879; Alves, Rejane Costa; https://orcid.org/0000000340593974; http://lattes.cnpq.br/8580447433109486; Santos, Lorenzo Lube dos; https://orcid.org/; http://lattes.cnpq.br/; Silva, Joao Gabriel Missia daThe structural use of wood of the Pine genus is increasing, due to the lack of native woods, conventionally used for structural purposes. Therefore, it is important to identify the characteristics of this structural material for its specific applications