Official Journal of the Japan Wood Research Society
From: Within-stem variations in mechanical properties of Melia azedarach planted in northern Vietnam
Variable | Description | n | WD (g/cm3) | MOR (MPa) | MOE (GPa) | Ed (GPa) |
---|---|---|---|---|---|---|
Radial direction (%) | 10 | 60 | 0.44 ± 0.01c | 54.64 ± 2.55c | 7.81 ± 0.22c | 9.15 ± 0.24c |
50 | 60 | 0.52 ± 0.01b | 82.18 ± 2.23b | 9.55 ± 0.20b | 11.20 ± 0.22b | |
90 | 60 | 0.57 ± 0.01a | 98.94 ± 1.48a | 10.41 ± 0.21a | 12.45 ± 0.23a | |
Stem height (m) above the ground | 7.3 | 36 | 0.51 ± 0.01a | 77.58 ± 4.20a | 9.71 ± 0.32a | 11.25 ± 0.38a |
5.3 | 36 | 0.49 ± 0.01a | 74.70 ± 4.01a | 8.87 ± 0.35a | 10.76 ± 0.40a | |
3.3 | 36 | 0.51 ± 0.01a | 78.78 ± 4.31a | 9.52 ± 0.31a | 11.25 ± 0.36a | |
1.3 | 36 | 0.50 ± 0.01a | 81.28 ± 4.05a | 9.36 ± 0.29a | 10.86 ± 0.34a | |
0.3 | 36 | 0.52 ± 0.01a | 80.57 ± 4.07a | 8.84 ± 0.34a | 10.55 ± 0.38a | |
Site | 1 | 90 | 0.50 ± 0.01b | 66.20 ± 2.55b | 8.25 ± 0.19b | 9.73 ± 0.21b |
2 | 90 | 0.52 ± 0.01a | 90.97 ± 1.90a | 10.27 ± 0.16a | 12.13 ± 0.18a | |
Mean | 180 | 0.51 ± 0.01 | 78.58 ± 1.84 | 9.26 ± 0.15 | 10.93 ± 0.17 |