Table 2.
P wave velocity and S shear waves velocity and stiffness on increment core (5 mm diameter and 2 cm length) and standard specimen (2 cm × 2 cm × 30 cm) on beech (Fagus Sylvatica) Average values. Wood moisture content 10% [4].
| Specimen type | Density | Velocity of P waves (m/s) | Stiffness moduli (N/mm2) | ||||
|---|---|---|---|---|---|---|---|
| P waves | (kg/m3) | VLL | VRR | VTT | CLL | CRR | CTT |
| Increment cores | 696 | 4150 | 1949 | 1452 | 12 071 | 2663 | 1493 |
| Standard specimens | 578 | 4980 | 2137 | 1492 | 17 245 | 3160 | 1547 |
| Difference (%) | 20.0 | 4.6 | 2.7 | 43 | 18.6 | 3.6 | |
| Velocity of S waves (m/s) | Shear moduli (N/mm2) | ||||||
| Shear waves | VLR | VLT | VRT | GLR | GLT | GRT | |
| Increment cores | 696 | 1000 | 1151 | 493 | 1050 | 1081 | 163 |
| Cubic specimens | 578 | 1368 | 1361 | 650 | 1302 | 1303 | 290 |
| Difference (%) | 36.8 | 18.2 | 31.8 | 24.0 | 20.5 | 43.7 | |
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