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Subjects -> BUILDING AND CONSTRUCTION (Total: 139 journals) - BUILDING AND CONSTRUCTION (131 journals) - CARPENTRY AND WOODWORK (8 journals)
CARPENTRY AND WOODWORK (8 journals)

Showing 1 - 8 of 8 Journals sorted alphabetically
	European Journal of Wood and Wood Products (Followers: 3)
	IAWA Journal
	International Wood Products Journal (Followers: 1)
	Journal of The Indian Academy of Wood Science (Followers: 2)
	Journal of Wood Chemistry and Technology (Followers: 6)
	Wood and Fiber Science (Followers: 2)
	Wood Material Science & Engineering (Followers: 10)
	Wood Science and Technology (Followers: 2)

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Wood and Fiber Science
Journal Prestige (SJR): 0.556

Citation Impact (citeScore): 1
Number of Followers: 2

Full-text available via subscription

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ISSN (Print) 0735-6161
Published by Society of Wood Science and Technology

[1 journal]

PERFORMANCE OF TIMBER BOARD MODELS FOR PREDICTION OF LOCAL BENDING
STIFFNESS AND STRENGTH – WITH APPLICATION ON DOUGLAS FIR SAWN TIMBER
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  Authors: A. Olsson, G. Pot, J. Viguier, M. Hu, J. Oscarsson
  Abstract: Efficient utilization of structural timber requires accurate methods for machine strength grading. One of the most accurate methods presented this far is based on data of local fiber orientation on board surfaces, obtained from laser scanning. In this paper, two potential improvements of this method are examined. The first one consists of replacing a model based on simple integration over cross sections of boards for calculation of local bending stiffness by a 3D solid finite element (FE) model from which local bending stiffness is derived. The second improvement concerns replacement of a simple model for the fiber orientation in the interior of board by a more advanced one taking location of pith and growth direction of knots into account. Application of the alternative models on a sample of more than 200 Douglas fir boards, size 40 mm X 100 mm X 3000 mm, cut from large logs, show that each of the evaluated model improvements contributes to improved grading accuracy. When local bending stiffness is calculated utilizing the herein suggested FE model in combination with the improved model of fiber orientation in the interior of boards, a coefficient of determination to bending strength as high as 0.76 is obtained. For comparison, a coefficient of determination of 0.71 is obtain using the simpler original models.
  PubDate: 2022-11-23
  Issue No: Vol. 54, No. 4 (2022)
INVESTIGATION OF BIOGAS DIGESTATE AS FIBER MATERIALS FOR COMPOSITES
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  Authors: Marion Gebhardt, Andreas Lemmer
  Abstract: Fiber reinforced plastics with synthetic fibers are widely used. Plant fibers are also known to produce more sustainable composites. However, there is a great interest in finding alternatives to classical natural fibers. The digestate of biogas plants seems to be such an alternative. Biogas plants are fed with plant-based substrates and during the digestion, the biomass is degraded. In this study, the fiber quality of digestates from four biogas plants with different initial substrates is investigated. Therefore, typical fiber properties, such as slenderness ratio, cell wall components, and the potential fiber performance, are measured. According to the general definition, the solid part of the digestate is a fiber material. The slenderness ratio is 5 or higher and the density is 1.5 gcm23, which is typical for natural fibers. Fibers with similar properties are already used in composite materials.
  PubDate: 2022-11-23
  Issue No: Vol. 54, No. 4 (2022)
FLEXURAL AND TENSILE PROPERTIES OF 2 X 6 AND 2 X 10 SOUTHERN PINE LUMBER
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  Authors: Marly G.C Uzcategui, Frederico J. N. Franca, R. Daniel Seale, Christopher Adam Senalik, Robert J. Ross
  Abstract: Bending modulus of elasticity (MOE) and tensile properties parallel to the grain were studied on 702 pieces of 2 X 6 and 285 pieces of 2 X 10 No. 2 visually graded southern pine lumber. The overall rings per inch (RPI) in 2 X 6 pieces was 4.82, whereas 2 X 10 had an RPI average of 3.82. For latewood percentage (LW), 2 X 6 pieces found 45.88% of LW and 45.02% for 2 X 10 pieces. Bending MOE (Eb) mean for 2 X 6 was 10,615 MPa, whereas for 2 X 10 lumber, the mean was 13,665 MPa. The tension MOE (Et) mean for 2 X 6 lumber was 11,339 MPa, whereas for 2 X 10 the mean was 9735 MPa. The ultimate tensile stress (UTS) mean for 2 X 6 lumber was 28.42 MPa and the overall mean UTS for 2 X 10 lumber was 24.51 MPa. Linear regression models were useful to explain the relationship between Eb and Et. Strong coefficients of determination (r250.70 and r250.74) were found for both lumber sizes between these two properties. Moderate relationships (r250.43 up to r250.51) between Eb and UTS were also found for both lumber sizes. However, weaker relationships were found between Et and UTS (r250.32 up to r250.40). Three distributions were fit to the Eb, Et, and UTS data and evaluated for goodness of fit. The results suggest that Eb of 2 X 6 lumber might be adequately modeled by a normal distribution, and tensile properties of 2 X 10 lumber might be adequately modeled by a lognormal distribution.
  PubDate: 2022-11-23
  Issue No: Vol. 54, No. 4 (2022)
SUMMARY OF AWARDS FROM SWST 2022 CONVENTION
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  Authors: Susan LeVan-Green
  Abstract: Summary of Awards
  PubDate: 2022-11-23
  Issue No: Vol. 54, No. 4 (2022)
LETTER FROM EDITOR
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  Authors: Susan LeVan-Green
  PubDate: 2022-11-23
  Issue No: Vol. 54, No. 4 (2022)