scholarly journals Exploration of Unutilized Fast Growing Wood Species from Secondary Forest in Central Kalimantan: Study on the Fiber Characteristic and Wood Density

2014 ◽  
Vol 20 ◽  
pp. 321-327 ◽  
Author(s):  
Danang Sudarwoko Adi ◽  
Lucky Risanto ◽  
Ratih Damayanti ◽  
Sri Rullyati ◽  
Listya M. Dewi ◽  
...  
Keyword(s):  
Wood Density ◽  
Wood Species ◽  
Secondary Forest ◽  
Central Kalimantan ◽  
Fast Growing ◽  
Fiber Characteristic

Physical and Mechanical Properties of Woods from Three Native Fast-Growing Species in a Secondary Forest in South Kalimantan, Indonesia

2014 ◽  
Vol 64 (1-2) ◽  
pp. 48-54 ◽  
Author(s):  
Wiwin Tyas Istikowati ◽  
Futoshi Ishiguri ◽  
Haruna Aiso ◽  
Fanny Hidayati ◽  
Jun Tanabe ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Secondary Forest ◽  
Physical And Mechanical Properties ◽  
Fast Growing ◽  
Fast Growing Species

Bondability of tropical fast-growing tree species I: Indonesian wood species

2007 ◽  
Vol 53 (1) ◽  
pp. 40-46 ◽  
Author(s):  
Eka Mulya Alamsyah ◽  
Liu Chang Nan ◽  
Masaaki Yamada ◽  
Kinji Taki ◽  
Hiroaki Yoshida
Keyword(s):  
Wood Species ◽  
Tree Species ◽  
Fast Growing

scholarly journals Biomass and carbon approximation model on burnt peatland in Eks- Milion Ha, Central Kalimantan Province of Indonesia

2020 ◽  
Vol 5 (4) ◽  
pp. 525-529
Author(s):  
Basuki Wasis ◽  
Bambang Hero Saharjo ◽  
Dadan Mulyana ◽  
Atikah ◽  
Wardana
Keyword(s):  
Carbon Content ◽  
Secondary Forest ◽  
Forest Biomass ◽  
Carbon Stocks ◽  
Natural Forest ◽  
Biomass Estimation ◽  
Secondary Forests ◽  
Natural Forests ◽  
Swamp Forest ◽  
Central Kalimantan

Forest and land fires will lead to the loss of forest ecosystems, loss of forest biomass and the sustainability of forests. After the event of fire whether an ecosystem will improve the forest and its environment. The study is intended to calculate biomass and carbon stocks in secondary natural forests that burn after 10 years and determine the model of biomass estimation and carbon stocks in secondary forests that burn after 10 years. This research was conducted on burnt peatlands in the Ex Million ha of Central Kalimantan Province of Indonesia. The research method used is the analysis of vegetation and destructive sampling on forest biomass that grows on burning peatlands. The result showed that biomass content of secondary natural forest formed after peat burns > 10 years in 466.2 ton / ha of and carbon content of 264.4 ton / ha. The estimation of biomass in secondary natural forest formed after peat burn> 10 years log is B = - 0.127 + 1.83 log D (B = 0.746 D 1.83) R2 : 87.5 % and carbon estimation is log K = - 0.506 + 1.92 log D (K = 0.312 D 1.92) R2: 85.7 %.  In the location of the burnt peat swamp forest there has been a succession of secondary forest and the equation model obtained in the study can be used to estimate biomass and carbon content.

Calorific value and fire risk of selected fast-growing wood species

2017 ◽  
Vol 131 (2) ◽  
pp. 899-906 ◽  
Author(s):  
Jozef Martinka ◽  
Filip Martinka ◽  
Peter Rantuch ◽  
Ivan Hrušovský ◽  
Lenka Blinová ◽  
...  
Keyword(s):  
Wood Species ◽  
Calorific Value ◽  
Fire Risk ◽  
Fast Growing

scholarly journals Sleeping beauties in materials science: unlocking the value of xylarium specimens in the search for timbers of the future

Holzforschung ◽  
2019 ◽  
Vol 73 (10) ◽  
pp. 889-897 ◽  
Author(s):  
Victor Deklerck ◽  
Tom De Mil ◽  
Patrick Kondjo ◽  
Hans Beeckman ◽  
Joris Van Acker ◽  
...  
Keyword(s):  
Wood Density ◽  
Wood Species ◽  
Dimensional Stability ◽  
Materials Science ◽  
Congo Basin ◽  
Image Correlation ◽  
Unknown Species ◽  
Fit For Purpose ◽  
End Use ◽  
Selection Of

Abstract Wood ranks among the most valued resources in construction, for joinery and furniture. Rather than increasing the pressure on a limited number of species, we need to move towards a fit for purpose approach where the basis for selection of a material is a solid knowledge of its relevant properties. Therefore, knowledge about wood technological characteristics of a vast range of wood species is needed. Here, we exploit the potential of xylarium samples by mapping wood density and dimensional stability, using digital image correlation (DIC) on non-standardised samples, of 53 different tropical wood species from the Congo Basin. Furthermore, we attempt to link the results with quantitative anatomical features of the different species tested. DIC proved successful compared to standard calliper measurements on reference samples (R2-radial = 0.94, R2-tangential = 0.96). Vessel properties play a larger role towards explaining dimensional stability compared to wood density. Fibre wall thickness is positively related to wood density and volumetric swelling. We are able to differentiate between species and sample groups with similar behaviour, partially explained by their anatomical structure. Selecting species based on the required properties for the targeted end use as such can unlock the potential of currently unknown species.

scholarly journals A Finite Element Investigation into the Effect of Slope of Grain on Wood Baseball Bat Durability

2019 ◽  
Vol 9 (18) ◽  
pp. 3733 ◽  
Author(s):  
Joshua Fortin-Smith ◽  
James Sherwood ◽  
Patrick Drane ◽  
Eric Ruggiero ◽  
Blake Campshure ◽  
...  
Keyword(s):  
Finite Element ◽  
Wood Density ◽  
Wood Species ◽  
Parametric Study ◽  
Material Behavior ◽  
Finite Element Models ◽  
Ball Speed ◽  
Ball Impact ◽  
Fundamental Understanding ◽  
The Relationship

Bat durability is defined as the relative bat/ball speed that results in bat breakage, i.e., the higher the speed required to initiate bat cracking, the better the durability. In 2008, Major League Baseball added a regulation to the Wooden Baseball Bat Standards concerning Slope-of-Grain (SoG), defined to be the angle of the grain of the wood in the bat with respect to a line parallel to the longitudinal axis of the bat, as part of an overall strategy to reverse what was perceived to be an increasing rate of wood bats breaking into multiple pieces during games. The combination of a set of regulations concerning wood density, prescribed hitting surface, and SoG led to a 30% reduction in the rate of multi-piece failures. In an effort to develop a fundamental understanding of how changes in the SoG impact the resulting bat durability, a popular professional bat profile was examined using the finite element method in a parametric study to quantify the relationship between SoG and bat durability. The parametric study was completed for a span of combinations of wood SoGs, wood species (ash, maple, and yellow birch), inside-pitch and outside-pitch impact locations, and bat/ball impact speeds ranging from 90 to 180 mph (145 to 290 kph). The *MAT_WOOD (MAT_143) material model in LS-DYNA was used for implementing the wood material behavior in the finite element models. A strain-to-failure criterion was also used in the *MAT_ADD_EROSION option to capture the initiation point and subsequent crack propagation as the wood breaks. Differences among the durability responses of the three wood species are presented and discussed. Maple is concluded to be the most likely of the three wood species to result in a Multi-Piece Failure. The finite element models show that while a 0°-SoG bat is not necessarily the most durable configuration, it is the most versatile with respect to bat durability. This study is the first comprehensive numerical investigation as to the relationship between SoG and bat durability. Before this numerical study, only limited empirical data from bats broken during games were available to imply a qualitative relationship between SoG and bat durability. This novel study can serve as the basis for developing future parametric studies using finite element modeling to explore a large set of bat profiles and thereby to develop a deeper fundamental understanding of the relationship among bat profile, wood species, wood SoG, wood density, and on-field durability.

Wood Density Determination by X- and Gamma-Ray Tomography

Holzforschung ◽  
2002 ◽  
Vol 56 (5) ◽  
pp. 535-540 ◽  
Author(s):  
A. Macedo ◽  
C. M. P. Vaz ◽  
J. C. D. Pereira ◽  
J. M. Naime ◽  
P. E. Cruvinel ◽  
...  
Keyword(s):  
Bulk Density ◽  
Wood Density ◽  
Wood Species ◽  
Gamma Ray ◽  
Wood Quality ◽  
Density Measurement ◽  
Calibration Procedure ◽  
Density Determination ◽  
Resolution Level

Summary Wood density measurement is related to several factors that influence wood quality. In this paper, a CT image calibration procedure which allows image quantification in terms of dry bulk density is presented for three different X- and gamma-ray energies (28.3, and 59.5, and 662.0 keV). The mass attenuation coefficients measured for a set of eight wood species did not vary significantly, allowing a single calibration for determination of bulk density of air-dried wood samples at each energy. The equation for bulk density calibration obtained was validated using a second set of twelve wood species. Comparison of bulk density determined by CT images, using the calibration procedure proposed, with values obtained by gravimetric methods, presented a very good linear correlation coefficient (R2=0.94). The main advantage of CT imaging over conventional techniques for wood bulk density determination is that it allows detection and quantification of heterogeneities and internal defects. At the sub-millimetric spatial resolution level, it is possible to identify morphological and structural aspects of wood samples.

scholarly journals Investigation of the adhesion performance of some fast-growing wood species based on their wettability

2021 ◽  
Vol 6 (1) ◽  
pp. 392-399
Author(s):  
Eka Mulya Alamsyah ◽  
Yoyo Suhaya ◽  
Sutrisno ◽  
Yayat Hidayat ◽  
Takashi Tanaka ◽  
...  
Keyword(s):  
Contact Angle ◽  
Wood Species ◽  
Acacia Mangium ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Tropical Region ◽  
Intimate Contact ◽  
Fast Growing ◽  
Block Shear ◽  
Adhesion Performance

Abstract The objective of this study was to investigate the adhesion performance of eight fast-growing wood species, namely, Enterolobium cyclocarpum, Paraserianthes falcataria, Shorea sp., Toona sinensis, Gmelina arborea, Pinus merkusii, Acacia mangium, and Acacia hybrid obtained from the tropical region. The wettability test was conducted by contact angle measurement, while the adhesion performance was expressed by strength retention (SR) and wood failure (WF) percentages through block shear tested under the Japanese Agricultural Standard (JAS). Results showed that smaller contact angle for P. falcataria followed by E. cyclocarpum, P. merkusii, T. sinensis, and Shorea indicated that the surfaces were easier to be glued than that of G. arborea, A. mangium, and A. hybrid. It is indicated that high wettability of P. falcataria, E. cyclocarpum, P. merkusii, T. sinensis, and Shorea resulted in the better adhesive spread and more intimate contact between the wood surface and the adhesive as shown by their high SR with high WF percentages.

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