Drying Schedule and Effect of Seasoning on Physical and Mechanical Properties of Three Available Timber Species in Bangladesh

2018 ◽  
Vol 4 (2) ◽  
pp. 59-66
Author(s):  
Shamima NaS. M. Feroz, Shamima Nasrin*,srin ◽  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Timber Species

scholarly journals Physical and mechanical properties of (Acacia auriculiformis x A mangium) hybrid Acacia

1970 ◽  
Vol 34 (2) ◽  
pp. 181-187 ◽  
Author(s):  
UK Rokeya ◽  
M Akter Hossain ◽  
M Rowson Ali ◽  
SP Paul
Keyword(s):  
Mechanical Properties ◽  
Specific Gravity ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Tectona Grandis ◽  
Acacia Auriculiformis ◽  
Timber Species ◽  
Green Condition ◽  
Natural Crossing ◽  
Academy Of Sciences

The physical and mechanical properties of hybrid Acacia, produced from natural crossing between two introduced timber species (Acacia auriculiformis and Acacia mangium) were studied. The timber hybrid Acacia is of medium dense having specific gravity 0.56 at green condition which is less than that of teak (Tectona grandis). The volumetric shrinkage of hybrid Acacia wood was found greater than that of teak but the specific gravity was found less than that of teak. From the study of physical and mechanical properties it is evident that the species is moderately strong. The species is suitable for making furniture and other household articles. Key words: Hybrid Acacia; Specific gravity; Physical properties; Mechanical properties DOI: 10.3329/jbas.v34i2.6864Journal of Bangladesh Academy of Sciences, Vol. 34, No. 2, 181-187, 2010

scholarly journals Bamboo as future bio-industrial material: Physical behaviour and bending strength of Malaysia’s Beting bamboo (Gigantochloa levis)

2022 ◽  
Vol 951 (1) ◽  
pp. 012001
Author(s):  
S Osman ◽  
M Ahmad ◽  
M N Zakaria ◽  
A M Zakaria ◽  
Z Ibrahim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Specific Gravity ◽  
Moisture Content ◽  
Physical Properties ◽  
Dimensional Stability ◽  
Fiber Orientation ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Timber Species ◽  
Industrial Material

Abstract In this paper, bending strength and physical properties (specific gravity, dimensional stability and equilibrium moisture content) of a Malaysian bamboo locally known as Beting bamboo (Gigantochloa levis) are addressed. Characterizations of physical and bending strength of G. levis in terms of the variability of location along culm height (top, middle, bottom), culm section (nodes and internodes), fiber orientation (longitudinal, tangential and radial) and culm layer (outer and inner) were conducted. Comparison of these properties is also made to some bamboo and commercial timber species. It was found that G. levis has favorable physical and mechanical properties although the specific gravity of G. levis has tendency to be on the higher side. The characteristics studied were found to have some variability at different locations, sections, and directions. There was variability in terms of bending strength along with the culm height of bamboo. It is indicated from this study that the bending strength and physical properties of G. levis were found to be satisfactory.

A Review of Shear Properties for Malaysian Tropical Timber in Structural Size

2021 ◽  
Vol 1025 ◽  
pp. 325-333
Author(s):  
Muhammad Bazli Faliq Mohd Puaad ◽  
Zakiah Ahmad ◽  
Nurul Faiizin Abdul Aziz ◽  
Adrina Rosseira Abu Talip ◽  
Mohd Hanafie Yasin
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Shear Modulus ◽  
Physical And Mechanical Properties ◽  
Torsion Test ◽  
Timber Species ◽  
Shear Properties ◽  
Tropical Timber ◽  
Structural Size ◽  
Numerous Data

In recent years, the studies on producing data on physical and mechanical properties of Malaysian timber specimens have evolved from small clear specimen to structural size specimen, where most of the research method was based on the American Standard Testing Manual ASTM D198. Numerous data regarding mechanical properties on structural size specimen have been produced through this method, such as bending and compression test. Unfortunately, studies on shear properties on structural size timber are very scarce. It has reviewed that the global timber researchers are focusing to produce data on shear properties of European timber species such as Oak, Spruce and Pine where both shear strength and shear modulus data were obtained from bending and torsion test. Furthermore, from the review of the existing literature, it is clear that there is no proper studies focusing on development of shear properties of Malaysian tropical timber, especially torsion test in accordance with EN 408:2010. Therefore, the aim of this study is to investigate the shear properties (shear strength and shear modulus) of Malaysian Tropical Timber in large size.

scholarly journals Assessment of physical and mechanical properties of Papua New Guinea timber species

2020 ◽  
pp. 0-0
Author(s):  
Benoit Belleville ◽  
Kilva Lancelot ◽  
Elaine Galore ◽  
Barbara Ozarska
Keyword(s):  
Mechanical Properties ◽  
Papua New Guinea ◽  
Physical And Mechanical Properties ◽  
New Guinea ◽  
Timber Species

scholarly journals Determination of Strength Classes of Selected Nigerian Timbers in Accordance with EN338 (2009)

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Idayat O Sholadoye ◽  
Idris Abubakar
Keyword(s):  
Mechanical Properties ◽  
Limit State ◽  
Physical And Mechanical Properties ◽  
Tectona Grandis ◽  
Bending Test ◽  
Timber Species ◽  
Gmelina Arborea ◽  
Permissible Stress ◽  
Four Point Bending ◽  
Four Point Bending Test

Wood has several unique, independent properties. The physical and mechanical properties of wood do vary from species to species and even within species due to environmental conditions during growth. In Nigeria, timber is been grade based on permissible stress (NCP) an upgrade to the limit state is required. A laboratory test was carried out to develop the physical and mechanical properties (four-point bending test) of the timber species in accordance with EN 13153-1, ASTM D143 and EN 408. The strength classification of selected timber was performed according to EN 338 using characteristic value of the material properties in accordance with EN384 from the generated physical and mechanical properties, after being adjusted to 12% (Eurocodes reference moisture content). The timber species considered were Tectona grandis and Gmelina arborea. The result showed Tectona grandis had a higher property than Gmelina arborea and the species were assigned to strength classes of D50 and D35 (hardwoods) respectively. The study shows that the selected timber species are suitable for structural purposes.Keywords: Strength classes, Nigerian timber, Four-point bending test, Tectona grandis, Gmelina arborea

The Use of SEM/EDX Analysis to Investigate the Pore Effect on the Mechanical Properties of some Selected Tropical Hardwoods

2021 ◽  
Vol 56 ◽  
pp. 64-76
Author(s):  
Joseph Olawale Akinyele ◽  
Abidemi Bashiru Folorunsho
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Beech Wood ◽  
Physical And Mechanical Properties ◽  
Mechanical Tests ◽  
Timber Species ◽  
Edx Analysis ◽  
Elemental Impurities ◽  
Hardwood Species ◽  
Three Samples

Previous studies have investigated the effect of moisture content on the physical and mechanical properties of timber species. This study investigated the effect of the tube-like grain pores in the wood and the presence of elemental impurities on the failure mechanism of four tropical hardwoods. The four hardwood species are Mahogany, Albizia, Beech and Birch. The moisture content of each wood specie was determined at normal temperature, mechanical tests were conducted to determine the strength of each wood samples, while the Scanning Electron Microscopy/ Energy Dispersion X-ray (SEM/EDX ) analysis was carried out to determine the high-resolution images and elemental peaks of the wood specie. The work concluded that beech wood failed earlier when compared to the other three samples due to high moisture content that is above the fibre saturation point. The SEM/EDX test revealed that the early failure was also as a result of the presence of large pores and elemental impurities in the sample of Beech wood.

scholarly journals Characterisation and grading of four selected timber species grown in Nigeria in accordance with Bs 5268

2021 ◽  
Vol 40 (4) ◽  
pp. 576-583
Author(s):  
U.N. Wilson ◽  
Y.N. Mohammad ◽  
I.S. Mohammed ◽  
F.O. Adeyemi
Keyword(s):  
Mechanical Properties ◽  
Laboratory Data ◽  
Physical And Mechanical Properties ◽  
Strength Properties ◽  
Bending Test ◽  
Analysis Tool ◽  
Timber Species ◽  
Parkia Biglobosa ◽  
Distribution Models ◽  
Vitex Doniana

This study presents a development of strength classes for Vitex doniana, Diospyros mespliformis, Parkia biglobosa and Isoberlinia doka, northern Nigeria timber species in accordance with BS 5268-2 (2002) and NCP 2 (1973). The specimens for the experimental measurements were obtained from timber-sheds in Zaria, Kaduna - Northern part of Nigeria. The laboratory experiments were conducted to determine the physical and mechanical properties of the selected timber species. The specimens were prepared in accordance with BS 373 for small clear specimens for the determination of physical and mechanical properties. Flexural strength properties were determined using three point bending test. Adjustment was made on the mechanical properties at moisture content of 12% and 18% in conformity with BS 5268-2 (2002) and NCP2 (1973) respectively. The laboratory data were analyzed using data analysis tool pack in Microsoft excel 2019 to generate the mean, coefficients of variation and theoretical distribution models which form the uncertainty models. Basic and grade stresses were also computed using experimental failure stresses. The selected timber species were then classified using the grade bending stress, density and mean modulus of elasticity obtained. Vitex doniana, Diospyros mespliformis, Parkia biglobosa and Isoberlinia doka were assigned to strength classes D30, D40, C40 and D30 in accordance with BS 5268-2 (2002) respectively. Similarly, in accordance with the NCP 2 (1973), these species belong to N4, N3, N4 and N3 respectively. The results obtained show that Vitex doniana, Diospyros mespliformis and Isoberlinia doka are hardwoods whereas, only Parkia biglobosa is a softwood species.

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