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Determinación del módulo elástico de Young en tableros contrachapados de madera de Eucalyptus nitens (Deane & Maiden)

21 Nov 2012-Vol. 9, Iss: 23, pp 29-34
TL;DR: In this paper, the Young's elastic modulus (EMO) was determined by three methods in a five-layer plywood from Eucalyptus nitens wood.
Abstract: It was determined the Young`s elastic modulus (EMO) by three methods in a five-layer plywood from Eucalyptus nitens wood. The control method had the lowest variability (22,45 %). The lower standard error respect to control method, corresponds to method 2 with a coefficient of 0,566. While, the higher variability correspond to method 3 (29,91%). However, the ANOVA indicates not significant difference between the means of each method. The average of Young`s elastic modulus obtained of 10,18 GPa in axial direction, indicates that the elastic behavior of plywood is similar to E. nitens solid wood (9,6 GPa). In addition, EMO obtained indicates that the plywood meets the requirements of brazilian standards NBR 9531 and NBR 9523 and european EN 310-1993, allowing its use in interior light construction, as concrete mold, furniture and general uses, although, according to APA standard not classified for heavy construction, marine and industrial use.
Citations
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12 Jul 2012
TL;DR: In this article, the authors evaluated the shear strength parallel to the fiber in an adhesive-type polyvinyl acetate (PVA) joint between adhesive type PVA and three wood species of Costa Rica and from plantation: Acacia mangium, Tectona grandis and T. amazonia according toASTM standards.
Abstract: We evaluated the shear strength parallel to the fiber in an adhesive joint between adhesive type polyvinyl acetate (PVA) and three wood species of Costa Rica and from plantation: Acacia mangium Willd., Tectona grandis L.f. y Terminalia amazonia A. Chev., according to ASTM standards. The results showed that shear strength of adhesive laminated joint in the three species was higher on the strength of the same kind of strength in solid wood. In A. mangium was obtained an increase 9.7% for T. grandis and T. Amazonia an increase 4.4%. The species T. grandis with the highest specific gravity (SG) value, showed the best in both test of shear strength and higher wood failure percentage in the adhesive joint. The applied adhesive is suitable for making laminated adhesive joints by principal side with pieces of wood in dry condition. Particularly, the adhesive is recommended for T. grandis, A. mangium and T. amazonia in that order of priority, according to the results obtained.

2 citations

References
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Journal Article
TL;DR: The development of wood composite materials constitutes a revolution in the forest products industry over the past several decades as discussed by the authors, and this month's feature by Tom Maloney gives us a snapshot of this industry and seeks to clarify some terminology.
Abstract: The development of wood composite materials constitutes a revolution in the forest products industry over the past several decades. This month's feature by Tom Maloney gives us a snapshot of this industry and seeks to clarify some terminology.

115 citations

01 Jan 2010
TL;DR: An overview of the general types and composition of wood-based composite products and the materials and processes used to manufacture them can be found in this paper, where the authors present several of the most common commercial products.
Abstract: This chapter gives an overview of the general types and composition of wood-based composite products and the materials and processes used to manufacture them. It describes conventional wood-based composite panels and structural composite materials intended for general construction, interior use, or both. This chapter also describes wood–nonwood composites. Mechanical properties of these types of composites are presented and discussed in Chapter 12. Because wood-based composites come in a variety of forms, we briefly describe several of the most common commercial products. This chapter is organized into three sections. The first section covers conventional wood-based composite panels. Materials, adhesives, and additives common to conventional wood-based composites are summarized. Specific products addressed include panel products such as plywood, oriented strandboard, particleboard, and fiberboard. Specialty composites are also discussed. The second section covers structural composite lumber, including glued-laminated timber, laminated veneer lumber, parallel strand lumber, laminated strand lumber, and oriented strand lumber. Wood–nonwood composites are discussed in the third section, including inorganic-bonded composites and wood–thermoplastic composites. Books have been written about each of these categories, and the constraints of this chapter necessitate that the discussion be general and brief. References are provided for more detailed information.

89 citations

01 Jan 2010
TL;DR: In this article, the authors present properties of wood and wood-based products of particular concern to the architect and engineer, and discuss the design of wood-and woodbased products.
Abstract: Summarizes information on wood as an engineering material. Presents properties of wood and wood-based products of particular concern to the architect and engineer. Includes discussion of designing with wood and wood-based products along with some pertinent uses.

65 citations


"Determinación del módulo elástico d..." refers background in this paper

  • ...No obstante, cuando el material se carga sobre el LP, entra en la zona de deformación plástica; y si la carga continúa, se produce la ruptura del material (Cai y Ross 2010)....

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  • ...29 a 34 En ensayos de tensión y compresión el MOE es referido como el MOE de Young para diferenciarlo del MOE en flexión (Cai y Ross 2010)....

    [...]

  • ...Cai y Ross (2010) reportan para tableros tipo plywood rangos entre 6,96-8,55 GPa para el MOE y entre 0,03-0,04 GPa para el MOR, ambos en flexión estática....

    [...]

30 Jun 2010
TL;DR: In this paper, the relation between anatomical features and density or specific gravity in wood was studied and an analysis about the influence of fibres, vessels, axial parenchyma and rays features over mean value and variation of density/specific gravity was presented.
Abstract: This work aimed to study the relation between anatomical features and density or specific gravity in wood. According to the importance of this physical property and its relation with other physical and mechanical properties of the wood, it is necessary to know which cellular elements influence on that. In softwoods, tracheids features are the main element on mean value and variation of density/specific gravity. In hardwoods, it is necessary to take into account all tissues types in wood to know its effect in density/specific gravity. An analysis about the influence of fibres, vessels, axial parenchyma and rays features over mean value and variation of density/specific gravity is presented.

13 citations