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Freddy Muñoz-Acosta

Bio: Freddy Muñoz-Acosta is an academic researcher from University of the Bío Bío. The author has contributed to research in topics: Eucalyptus nitens & Solid wood. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

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21 Nov 2012
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.

1 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