Prediction of the mechanical properties of lumber by stress-wave velocity and Pilodyn penetration of 36-year-old Japanese larch trees

2008 ◽  
Vol 66 (4) ◽  
pp. 275-280 ◽  
Author(s):  
Futoshi Ishiguri ◽  
Ryusei Matsui ◽  
Kazuya Iizuka ◽  
Shinso Yokota ◽  
Nobuo Yoshizawa
Keyword(s):  
Mechanical Properties ◽  
Wave Velocity ◽  
Stress Wave ◽  
Japanese Larch ◽  
Stress Wave Velocity ◽  
Old Japanese ◽  
Pilodyn Penetration

Variation in tree growth characteristics, stress-wave velocity, and Pilodyn penetration of 24-year-old teak (Tectona grandis) trees originating in 21 seed provenances planted in Indonesia

2013 ◽  
Vol 59 (6) ◽  
pp. 512-516 ◽  
Author(s):  
Fanny Hidayati ◽  
Futoshi Ishiguri ◽  
Kazuya Iizuka ◽  
Kazuko Makino ◽  
Yuya Takashima ◽  
...  
Keyword(s):  
Wave Velocity ◽  
Stress Wave ◽  
Tree Growth ◽  
Tectona Grandis ◽  
Growth Characteristics ◽  
Stress Wave Velocity ◽  
Pilodyn Penetration

Growth characteristics, stress-wave velocity, and Pilodyn penetration of 15 clones of 12-year-old Tectona grandis trees planted at two different sites in Indonesia

2013 ◽  
Vol 59 (3) ◽  
pp. 249-254 ◽  
Author(s):  
Fanny Hidayati ◽  
Futoshi Ishiguri ◽  
Kazuya Iizuka ◽  
Kazuko Makino ◽  
Jun Tanabe ◽  
...  
Keyword(s):  
Wave Velocity ◽  
Stress Wave ◽  
Tectona Grandis ◽  
Growth Characteristics ◽  
Stress Wave Velocity ◽  
Pilodyn Penetration

Propagation velocity model of stress waves in larch wood (Larix gmelinii) three-dimensional space with different moisture contents

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 6680-6695
Author(s):  
Xiwen Wei ◽  
Liping Sun ◽  
Hongjv Zhou ◽  
Yang Yang ◽  
Yifan Wang ◽  
...  
Keyword(s):  
Moisture Content ◽  
Wave Velocity ◽  
Stress Wave ◽  
Propagation Velocity ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Stress Waves ◽  
Moisture Contents ◽  
Direction Angle ◽  
Stress Wave Velocity

Based on the effects of stress wave propagation in larch (Larix gmelinii) wood, the propagation mechanism of stress wave was explored, and a theoretical model of the propagation velocity of stress waves in the three-dimensional space of wood was developed. The cross and longitudinal propagation velocities of stress wave were measured in larch wood under different moisture contents (46% to 87%, 56% to 96%, 20% to 62%, and 11% to 30%) in a laboratory setting. The relationships between the propagation velocity of stress waves and the direction angle or chord angle with different moisture contents were analyzed, and the three-dimensional regression models among four parameters were established. The analysis results indicated that under the same moisture content, stress wave velocity increased as the direction angle increased and decreased as chord angle increased, and the radial velocity was the largest. Under different moisture contents, stress wave velocity gradually decreased as moisture content increased, and the stress wave velocity was more noticeably affected by moisture content when moisture content was below the fiber saturation point (FSP, 30%). The nonlinear regression models of the direction angle, chord angle, moisture content, and the propagation velocity of stress wave fit the experiment data well (R2 ≥ 0.97).

STRESS WAVE VELOCITY AND CRACK SYSTEM OF A MEDIUM *

1974 ◽  
Vol 22 (4) ◽  
pp. 710-721
Author(s):  
V. SCHENK ◽  
Z. SCHENKOVA
Keyword(s):  
Wave Velocity ◽  
Stress Wave ◽  
Crack System ◽  
Stress Wave Velocity

scholarly journals Influence of moisture content on estimating Young’s modulus of full-scale timber using stress wave velocity

2017 ◽  
Vol 63 (3) ◽  
pp. 225-235 ◽  
Author(s):  
Mariko Yamasaki ◽  
Chika Tsuzuki ◽  
Yasutoshi Sasaki ◽  
Yuji Onishi
Keyword(s):  
Moisture Content ◽  
Young’S Modulus ◽  
Wave Velocity ◽  
Stress Wave ◽  
Young's Modulus ◽  
Full Scale ◽  
Stress Wave Velocity

Stress Wave Velocities in Bovine Patellar Tendon

1998 ◽  
Vol 120 (3) ◽  
pp. 321-326 ◽  
Author(s):  
J. J. Crisco ◽  
T. C. Dunn ◽  
R. D. McGovern
Keyword(s):  
Elastic Modulus ◽  
Strain Rate ◽  
Wave Velocity ◽  
Patellar Tendon ◽  
Stress Wave ◽  
Stress Waves ◽  
Force Transmission ◽  
Static Testing ◽  
Wave Velocities ◽  
Stress Wave Velocity

The velocity of longitudinal stress waves in an elastic body is given by the square root of the ratio of its elastic modulus to its density. In tendinous and ligamentous tissue, the elastic modulus increases with strain and with strain rate. Therefore, it was postulated that stress wave velocity would also increase with increasing strain and strain rate. The purpose of this study was to determine the velocity of stress waves in tendinous tissue as a function of strain and to compare these values to those predicted using the elastic modulus derived from quasi-static testing. Five bovine patellar tendons were harvested and potted as bone–tendon–bone specimens. Quasi-static mechanical properties were determined in tension at a deformation rate of 100 mm/s. Impact loading was employed to determine wave velocity at various strain levels, achieved by preloading the tendon. Following impact, there was a measurable delay in force transmission across the specimen and this delay decreased with increasing tendon strain. The wave velocities at tendon strains of 0.0075, 0.015, and 0.0225 were determined to be 260 ± 52 m/s, 360 ± 71 m/s, and 461 ± 94 m/s, respectively. These velocities were significantly (p < 0.01) faster than those predicted using elastic moduli derived from the quasi-static tests by 52, 45, and 41 percent, respectively. This study has documented that stress wave velocity in patellar tendon increases with increasing strain and is underestimated with a modulus estimated from quasi-static testing.

Stress-wave velocity of trees and dynamic Young’s modulus of logs of 4-year-old Eucalyptus camaldulensis trees selected for pulpwood production in Thailand

2013 ◽  
Vol 59 (6) ◽  
pp. 506-511 ◽  
Author(s):  
Futoshi Ishiguri ◽  
Sapit Diloksumpun ◽  
Jun Tanabe ◽  
Kazuya Iizuka ◽  
Shinso Yokota
Keyword(s):  
Young’S Modulus ◽  
Wave Velocity ◽  
Stress Wave ◽  
Young's Modulus ◽  
Eucalyptus Camaldulensis ◽  
Dynamic Young’S Modulus ◽  
Stress Wave Velocity ◽  
Dynamic Young's Modulus

Detection of pith location in chestnut lumber (Castanea sativa Mill.) by means of acoustic tomography and longitudinal stress-wave velocity

2009 ◽  
Vol 68 (2) ◽  
pp. 197-206 ◽  
Author(s):  
R. A. Mariño ◽  
M. E. Fernández ◽  
C. Fernández-Rodríguez ◽  
M. Méndez
Keyword(s):  
Wave Velocity ◽  
Stress Wave ◽  
Castanea Sativa ◽  
Acoustic Tomography ◽  
Longitudinal Stress ◽  
Stress Wave Velocity ◽  
Castanea Sativa Mill
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