International Journal of Materials Engineering
pISSN: 21665389 eISSN: 21665400
2018; 8(6): 162166
doi:10.5923/j.ijme.20180806.05
Lucas José Marini^{1}, André Luís Christoforo^{2}, Francisco Antonio Rocco Lahr^{3}
^{1}Department of Materials Engineering (SMM), São Carlos School of Engineering, University of São Paulo (USP), São Carlos, SP, Brazil
^{2}Centre for Innovation and Technology in Composites (CITeC), Department of Civil Engineering (DECiv), Federal University of São Carlos (UFSCar), São Carlos, Brazil
^{3}Department Structural Engineering (SET), São Carlos School of Engineering, University of São Paulo (USP), São Carlos, SP, Brazil
Correspondence to: Lucas José Marini, Department of Materials Engineering (SMM), São Carlos School of Engineering, University of São Paulo (USP), São Carlos, SP, Brazil.
Email: 
Copyright © 2018 The Author(s). Published by Scientific & Academic Publishing.
This work is licensed under the Creative Commons Attribution International License (CC BY).
http://creativecommons.org/licenses/by/4.0/
The modulus of elasticity is among the main properties required for the dimensioning of a wood structure. It can be calculated using different test methods, the most commonly used are the 3 and 4 points bending tests. The Brazilian standard, ABNT NBR 7190: 1997, recommends the 3point static bending test. Studies about the influence of testing methods to determine the bending modulus of elasticity are always relevant, since can improve its reliability. Thus, the aim of this study is to examine the bending modulus of elasticity of samples of nine Brazilian wood species: Cambará Rosa (Erisma uncinatum Warm), Caxeta (Tabebuia cassinoides), Tatajuba (Bagassa guianensis), Itaúba (Mezilaurus itauba), Branquilho (Termilalia spp), Cedro Amazonense (Cedrelinga catenaeformis Ducke), Roxinho (Peltogyne spp.), Cumaru (Dipteryx odorata) and Cambará (Gochnatia polymorpha). The results of the confidence intervals have showed that the moduli of elasticity for both test methods were equivalent at 5% significance level.
Keywords: Tropical species, Bending test, 3 and 4 points, Characterization, Analysis of variance (ANOVA)
Cite this paper: Lucas José Marini, André Luís Christoforo, Francisco Antonio Rocco Lahr, Comparison of Two Methods to Determine the Bending Modulus of Elasticity of Wood, International Journal of Materials Engineering , Vol. 8 No. 6, 2018, pp. 162166. doi: 10.5923/j.ijme.20180806.05.

(1) 
Figure 1. Three point bending tests model 
Figure 2. Four point bending tests model 
(2) 
(3) 
Figure 3. Elasticity modulus obtained from three points bending test 
Figure 4. Elasticity modulus obtained from four points bending test 
