Table 27.
Ultrasonic velocities on flakeboards of 19 mm thickness with bulk waves and surface waves [67].
| Density |
Bulk waves frequency 1 MHz |
Surface wave |
||||||
|---|---|---|---|---|---|---|---|---|
| (kg/m3) |
P waves (m/s) |
S waves (m/s) |
(m/s) |
|||||
| V11 | V22 | V33 | V44 | V55 | V66 | vsurface | ||
| Average | 634 | 2379 | 2155 | 704 | 564 | 618 | 1129 | 2345 |
| Minim | 602 | 2198 | 1966 | 652 | 528 | 574 | 1070 | 2172 |
| Maximum | 665 | 2613 | 2310 | 841 | 622 | 648 | 1239 | 2612 |
| Coef variation % | 3 | 4 | 4 | 6 | 3 | 3 | 3 | 4 |
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