The relations of fiber length, wood density, and compressive strength to ultrasonic wave velocity within stem of Melia azedarach

研究成果: ジャーナルへの寄稿記事

抄録

Radial and axial variations in the longitudinal ultrasonic wave velocity within stem of 17–19-year-old Melia azedarach planted in two different sites in northern Vietnam were experimentally investigated. Wood samples were collected from 10, 50, and 90% of the radial length from pith at 0.3, 1.3, 3.3, 5.3, and 7.3 m heights above the ground to measure ultrasonic velocity (Vu), fiber length (FL), air-dry density (AD), and compressive strength (CS) at moisture content approximately 12%. The average wave velocity for two sites exhibited minimum value near the pith about 3700 m/s. It kept increasing to 4200 m/s at the middle position before remaining constant value forward to outside. In axial direction, the variation of Vu with height was very small and without statistical significance. Vu had a strong positive linear relationship with both FL (r = 0.69, p < 0.001) and AD (r = 0.67, p < 0.001). These findings reveal that the FL and AD greatly influence the within-tree variations in the ultrasonic wave velocity in M. azedarach. Besides, the significant positive linear correlation between CS and Vu suggests that Vu was a useful predictor of the CS for M. azedarach planted in northern Vietnam.

元の言語英語
ジャーナルJournal of the Indian Academy of Wood Science
16
発行部数1
DOI
出版物ステータス出版済み - 6 1 2019

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Melia azedarach
Ultrasonic velocity
dry density
wood density
compressive strength
Compressive strength
wave velocity
ultrasonics
Wood
stem
stems
Fibers
pith
air
Air
Vietnam
moisture content
Moisture
water content
fibre

All Science Journal Classification (ASJC) codes

  • Forestry
  • Biomaterials
  • Plant Science

これを引用

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title = "The relations of fiber length, wood density, and compressive strength to ultrasonic wave velocity within stem of Melia azedarach",
abstract = "Radial and axial variations in the longitudinal ultrasonic wave velocity within stem of 17–19-year-old Melia azedarach planted in two different sites in northern Vietnam were experimentally investigated. Wood samples were collected from 10, 50, and 90{\%} of the radial length from pith at 0.3, 1.3, 3.3, 5.3, and 7.3 m heights above the ground to measure ultrasonic velocity (Vu), fiber length (FL), air-dry density (AD), and compressive strength (CS) at moisture content approximately 12{\%}. The average wave velocity for two sites exhibited minimum value near the pith about 3700 m/s. It kept increasing to 4200 m/s at the middle position before remaining constant value forward to outside. In axial direction, the variation of Vu with height was very small and without statistical significance. Vu had a strong positive linear relationship with both FL (r = 0.69, p < 0.001) and AD (r = 0.67, p < 0.001). These findings reveal that the FL and AD greatly influence the within-tree variations in the ultrasonic wave velocity in M. azedarach. Besides, the significant positive linear correlation between CS and Vu suggests that Vu was a useful predictor of the CS for M. azedarach planted in northern Vietnam.",
author = "{Van Duong}, Doan and Masumi Hasegawa and Junji Matsumura",
year = "2019",
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AU - Van Duong, Doan

AU - Hasegawa, Masumi

AU - Matsumura, Junji

PY - 2019/6/1

Y1 - 2019/6/1

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AB - Radial and axial variations in the longitudinal ultrasonic wave velocity within stem of 17–19-year-old Melia azedarach planted in two different sites in northern Vietnam were experimentally investigated. Wood samples were collected from 10, 50, and 90% of the radial length from pith at 0.3, 1.3, 3.3, 5.3, and 7.3 m heights above the ground to measure ultrasonic velocity (Vu), fiber length (FL), air-dry density (AD), and compressive strength (CS) at moisture content approximately 12%. The average wave velocity for two sites exhibited minimum value near the pith about 3700 m/s. It kept increasing to 4200 m/s at the middle position before remaining constant value forward to outside. In axial direction, the variation of Vu with height was very small and without statistical significance. Vu had a strong positive linear relationship with both FL (r = 0.69, p < 0.001) and AD (r = 0.67, p < 0.001). These findings reveal that the FL and AD greatly influence the within-tree variations in the ultrasonic wave velocity in M. azedarach. Besides, the significant positive linear correlation between CS and Vu suggests that Vu was a useful predictor of the CS for M. azedarach planted in northern Vietnam.

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