Official Journal of the Japan Wood Research Society
Table 2 Comparison of linear correlations for Meyer law and Brinell and Monnin measures
From: An attempt to unify the Brinell, Janka and Monnin hardness of wood on the basis of Meyer law
Information about the hardness test | \(F = a \cdot (d^{n} ) + b\) | \(F = a \cdot h + b\) | ||||
|---|---|---|---|---|---|---|
Indenter | D (mm) | Wood sample | r2 | b (N) | r2 | b (N) |
Ball (n = 2.5) | 10 | Norway Maple | 0.9964 | − 53 | 0.9935 | − 203 |
Ball (n = 2.5) | 10 | European Oak | 0.9986 | 55 | 0.9949 | − 70 |
Ball (n = 2.5) | 10 | American Sweetgum | 0.9964 | 4 | 0.9989 | − 146 |
Ball (n = 2.5) | 10 | Large-leaf Linden | 0.9057 | − 182 | 0.8999 | − 324 |
Ball (n = 2.5) | 10 | Beech (sample C) | 0.9929 | 38 | 0.9917 | − 48 |
Ball (n = 2.5) | 15 | Beech (sample C) | 0.9916 | 136 | 0.9897 | 5 |
Ball (n = 2.5) | 30 | Beech (sample C) | 0.9841 | 10 | 0.9790 | − 893 |
Ball (n = 2.5) | 10 | Beech (sample D) | 0.9868 | 7 | 0.9763 | 45 |
Ball (n = 2.5) | 15 | Beech (sample D) | 0.9920 | − 25 | 0.9941 | − 53 |
Ball (n = 2.5) | 30 | Beech (sample D) | 0.9965 | − 291 | 0.9987 | − 668 |
Cylinder (n = 1.5) | 10 | Beech (sample C) | 0.9694 | − 207 | 0.8838 | 6005 |
Cylinder (n = 1.5) | 15 | Beech (sample C) | 0.9964 | 1719 | 0.8831 | 9718 |
Cylinder (n = 1.5) | 30 | Beech (sample C) | 0.9967 | − 2200 | 0.9906 | 3301 |
Cylinder (n = 1.5) | 10 | Beech (sample D) | 0.9792 | − 143 | 0.8771 | 3769 |
Cylinder (n = 1.5) | 15 | Beech (sample D) | 0.9882 | 1735 | 0.9249 | 6624 |
Cylinder (n = 1.5) | 30 | Beech (sample D) | 0.9876 | 2864 | 0.9170 | 10,004 |