20.500.12556/RUL-135497
From visual grading and dynamic modulus of European beech (Fagus sylvatica) logs to tensile strength of boards
The aim of the present paper is to assess the non-destructive indicating properties of Slovenian beech (Fagus sylvatica) logs and correlate them with the mechanical properties of the final product, which is boards. Beech logs were visually graded according to the standard procedure and vibrational frequencies were measured. Logs were further on sawn into boards which were also non-destructively tested in wet and dry conditions. Finally, the boards were experimentally tested in tension. Special focus was directed towards visual parameters of the beech logs and their influence on the overall quality of the output material. The longitudinal natural frequencies of the logs were studied as potential indicating properties. The results showed that a majority of the visual log grading parameters do not result in good quality timber in terms of strength and stiffness properties, and only few are decisive for the final classification. The coefficient of determination of the static MOE vs. dynamic MOE of logs was r$^2$ = 0.13, whereas vs. the MOE of wet boards was r$^2$ = 0.49. Using a few visual characteristics in combination with dynamic measurements of logs and of wet boards could help to increase the yield of high quality beech wood.
visual grading
machine grading
beech
tension strength
longitudinal vibration
dynamic modulus
hardwood
pregrading
moisture equilibrium
modulus of elasticity
vizualno razvrščanje
strojno razvrščanje
bukev
natezna trdnost
vzdolžne vibracije
dinamični modul
les listavcev
predrazvrščanje
vlažnostno ravnovesje
modul elastičnosti
true
false
true
Angleški jezik
Slovenski jezik
Članek v reviji
2022-03-16 15:31:41
2022-03-16 15:31:43
2022-09-14 04:13:38
0000-00-00 00:00:00
2022
0
0
18 str.
iss. 1, art. 77
Vol. 13
Jan. 2022
0000-00-00
Zaloznikova
Objavljeno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
539.412:624.011.1
1999-4907
10.3390/f13010077
92687363
RAZ_Plos_Mitja_2022.pdf
RAZ_Plos_Mitja_2022.pdf
1
F52F07AB83BB2DD099A544FFCB297482
ee500c01ff3c82c8a38517ee788c89ae1bb98727855e2d1367e173289ff533d1
21f6557b-a536-11ec-8556-00155dcfd717
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154605
https://www.mdpi.com/1999-4907/13/01/77
1
cbcf5bae-a535-11ec-8556-00155dcfd717
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154604
Fakulteta za gradbeništvo in geodezijo
0
0
0