Hybrid Panels of Wood Plies and Particles Pinus sp

Macedo, Laurenn Borges de; Balanco, Giovana Gobatto; Marini, Lucas José; Panzera, Túlio Hallak; Christofóro, André Luis; Lahr, Francisco Antônio Rocco

doi:10.9734/cjast/2017/36951

Cited by 1 publication

(1 citation statement)

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“…Since the beginning of civilization, wood has been used for many purposes because of its versatility and facility to obtaining. These characteristics made wood indispensable for industrial, military and technological evolution [1,2,3,4]. Among these characteristics, it is worth mentioning that wood is a renewable material, aesthetically attractive for civil constructions, has good thermal and electrical insulation, which contributes to the energy efficiency of a building [1,5].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stiffness in Compression Perpendicular to Grain of Brazilian Tropical Wood Species

Almeida¹,

Lanini²,

Caetano³

et al. 2018

CJAST

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It is essential to have full knowledge of wood properties, such as strength and stiffness, for the preparation of reliable structural designs. The Brazilian Code ABNT NBR 7190 (1997) establishes that the modulus of elasticity in compression perpendicular to grain (E c90 ) can be obtained in a Original Research Article simplified way, in the absence of experimental determination, by means of a correlation with the modulus of elasticity in the direction parallel to grain (E c0 = 20 E c90 ). In order to verify the adequacy of this expression, the results obtained for five species of wood, covering the strength classes assumed by the mentioned Code were analyzed: Cambará Rosa (Erisma sp.), C20; Cedro Amazonense (Cedrella sp.), C30; Cupiúba (Goupia glabra), C40; Itaúba (Mezilaurus itauba), C50; Roxinho (Peltogyne sp.), C60. For each species, from the tests prescribed by ABNT NBR 7190, the elastic moduli were obtained in the directions parallel and normal to grain. In the evaluation of the precision of the proposed estimation, the least squares method was used to determine the coefficient α of the investigated relation. For the data set involving the five species studied, the coefficient resulted in α = 20.64. This value is compatible with the correlation proposed by the Brazilian standard, evidencing its reliability.

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Section: Introductionmentioning

confidence: 99%