Official Journal of the Japan Wood Research Society
From: An attempt to unify the Brinell, Janka and Monnin hardness of wood on the basis of Meyer law
Beech 782 kg/m3 Sample C (h 9%) | Hardness measures (mean value ± standard error) (MPa) | |||
---|---|---|---|---|
Spherical (ball) | Cylindrical | |||
Indenter diameter D (mm) | New measure HKb | Brinell HB | New measure HKc | Brinell type HBc |
10 | 44.0 ± 1.5 | 44.1 ± 1.3 | 45.2 ± 1.1 | 46.8 ± 2.4 |
15 | 41.3 ± 0.7 | 42.5 ± 1.2 | 42.7 ± 1.1 | 42.7 ± 1.2 |
30 | 42.5 ± 1.0 | 42.2 ± 1.9 | 42.8 ± 0.6 | 37.2 ± 1.8 |
Arithmetic mean | 42.6 ± 1.4* | 42.9 ± 1.0* | 43.6 ± 1.4* | 42.2 ± 4.8* |
Average means | 42.83 ± 0.57* |