Official Journal of the Japan Wood Research Society
Table 1 Results of the pullout resistance for untreated and pretreatment group
Test group | Welding time (s) | Mean value (N) | Max value (N) | Min value (N) | Variable coefficient (%) |
|---|---|---|---|---|---|
Untreated group | 3 | 2790 | 3602 | 2072 | 15.92 |
5 | 2174 | 3024 | 1056 | 25.45 | |
7 | 1491 | 2434 | 722 | 34.15 | |
Pretreatment group | 3 | 4695 | 6094 | 3006 | 15.21 |
5 | 2915 | 3836 | 1584 | 24.34 | |
7 | 2037 | 2614 | 1208 | 21.01 |