Triaxial variation of the modulus of elasticity in the thermo-elastic range of six tropical wood species

This study aimed, with the aid of analysis of variance (ANOVA), to investigate and quantify the influence of moisture ranging between 12% and over 30% (fiber saturation) on the mechanical properties: strength and modulus of elasticity in compression and in tension parallel to grain; modulus of rupture and modulus of elasticity in static bending; shear strength parallel to grain considering wood species Ipê (Tabebuia sp) and Angelim Araroba (Vataireopsis araroba). Tests were performed according to the assumptions and calculating methods Brazilian standard ABNT NBR 7190, Anexx B, totalizing 400 tests. Results of ANOVA revealed a significant reduction (16% on average) for mechanical properties wood due to the increase in moisture content from 12% to over 30% (fiber saturation). The same behavior also occurred when assembly containing the two species was considered.

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The changes in color and dynamic modulus of elasticity of five important Indonesian tropical wood species after 10 months of outdoor exposure

Journal of the Indian Academy of Wood Science ◽

10.1007/s13196-018-0220-7 ◽

2018 ◽

Vol 15 (2) ◽

pp. 149-157 ◽

Cited By ~ 1

Author(s):

Lina Karlinasari ◽

Muhammad Irsyad Azmi ◽

Trisna Priadi

Keyword(s):

Wood Species ◽

Modulus Of Elasticity ◽

Dynamic Modulus ◽

Outdoor Exposure ◽

Tropical Wood ◽

Dynamic Modulus Of Elasticity

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Evaluation of Longitudinal Modulus of Elasticity in Wood Species for Structural Application

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1025-1026.192 ◽

2014 ◽

Vol 1025-1026 ◽

pp. 192-195

Author(s):

Eduardo Chahud ◽

Luiz Antônio Melgaço Nunes Branco ◽

André Luis Christoforo ◽

Francisco Antonio Rocco Lahr ◽

Rosane Aparecida Gomes Battistelle ◽

...

Keyword(s):

Wood Species ◽

Modulus Of Elasticity ◽

Mechanical Test ◽

Font Size ◽

Bending Tests ◽

Structural Application ◽

Longitudinal Elastic Modulus ◽

Longitudinal Modulus ◽

Dipteryx Odorata ◽

Brazilian Standard

1024x768 This research aimed to investigate possible differences in values of longitudinal modulus of elasticity for wood species usually employed for structural purposes, as Castanheira (Bertholletia excelsa), Cambará (Erisma uncinatum), Cumaru (Dipteryx odorata), Jatobá (Hymenaea stilbocarpa), Garapa (Apuleia leiocarpa) and Peroba Rosa (Aspidosperma polyneuron), obtained from compression and tension parallel to grain, and static bending tests. Recommendations of the Brazilian standard ABNT NBR 7190:1997, Annex B, were followed. Statistical analysis results for the cited properties, had equivalent averages for the six wood species analyzed. This confirms that any of the three tests can be used to obtain the longitudinal elastic modulus and which could avoid the necessity of evaluating stiffness values for wood by more than one kind of mechanical test. Normal 0 21 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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Compact computer vision system for tropical wood species recognition based on pores and concentric curve

2013 3rd International Conference on Instrumentation Control and Automation (ICA) ◽

10.1109/ica.2013.6734071 ◽

2013 ◽

Cited By ~ 3

Author(s):

E. Yuliastuti ◽

Suprijanto ◽

S. Retno Sasi

Keyword(s):

Computer Vision ◽

Wood Species ◽

Vision System ◽

Species Recognition ◽

Computer Vision System ◽

Tropical Wood

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Mechanical Properties of Commercial Particleboard from Rubberwood (Hevea Brasiliensis) and Recycle Mix-Tropical Wood with Different Board Density

Science Proceedings Series ◽

10.31580/sps.v3i1.1941 ◽

2021 ◽

Vol 3 (1) ◽

pp. 41-44

Author(s):

Nur Wafa Amalina Amali ◽

Nor Yuziah Mohd Yunus ◽

Wan Mohd Nazri Wan Abdul Rahman

Keyword(s):

Mechanical Properties ◽

Modulus Of Elasticity ◽

Hevea Brasiliensis ◽

Urea Formaldehyde ◽

Wood Particle ◽

Modulus Of Rupture ◽

Internal Bonding ◽

Board Density ◽

Tropical Wood ◽

Minimum Requirements

In this study, mechanical properties of commercially manufactured hybrid particleboard from mix-tropical wood and rubberwood with four different densities at 25mm thickness have been investigated. The particleboard sample cutting and testing was in accordance to EN312:2013. The density of particleboard is identified with interval of 10kg/m3 for different densities which include 660kg/m3, 670kg/m3, 680kg/m3 and 690kg/m3. Particleboards were made with the ratio of 40:60 for mix-tropical wood particle and rubberwood particle respectively. The particleboards were prepared with urea formaldehyde (UF) with E1 formulation with addition of wax and hardener. Increment of 10kg/m3 density for each particleboard led to increase in internal bonding (IB), bending testing include modulus of rupture (MOR) and modulus of elasticity (MOE), surface soundness (SS) and screw edge (SE) withdrawal. It was found that with board increment of 10kg/m3, the improvement was not statically significant except that for MOR. All panels met the minimum requirements of standard.

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