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From visual grading and dynamic modulus of European beech (Fagus sylvatica) logs to tensile strength of boards
ID Plos, Mitja (Avtor), ID Fortuna, Barbara (Avtor), ID Šuligoj, Tamara (Avtor), ID Turk, Goran (Avtor)

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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:visual grading, machine grading, beech, tension strength, longitudinal vibration, dynamic modulus, hardwood, pregrading, moisture equilibrium, modulus of elasticity
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Status publikacije:Objavljeno
Različica publikacije:Objavljena publikacija
Leto izida:2022
Št. strani:18 str.
Številčenje:Vol. 13, iss. 1, art. 77
PID:20.500.12556/RUL-135497 Povezava se odpre v novem oknu
UDK:539.412:624.011.1
ISSN pri članku:1999-4907
DOI:10.3390/f13010077 Povezava se odpre v novem oknu
COBISS.SI-ID:92687363 Povezava se odpre v novem oknu
Datum objave v RUL:16.03.2022
Število ogledov:1206
Število prenosov:151
Metapodatki:XML DC-XML DC-RDF
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Gradivo je del revije

Naslov:Forests
Skrajšan naslov:Forests
Založnik:MDPI
ISSN:1999-4907
COBISS.SI-ID:3872166 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:06.01.2022

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:vizualno razvrščanje, strojno razvrščanje, bukev, natezna trdnost, vzdolžne vibracije, dinamični modul, les listavcev, predrazvrščanje, vlažnostno ravnovesje, modul elastičnosti

Projekti

Financer:EC - European Commission
Program financ.:ERA-NET Plus, WoodWisdom-net
Akronim:EU HARDWOODS

Financer:EC - European Commission
Program financ.:FP7
Številka projekta:321573
Naslov:WoodWisdom-Net+ Pacing Innovation in the Forest-Based Sector
Akronim:WOODWISDOM-NET+

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Slovenia, Ministry of Education, Science, and Sport
Akronim:EU HARDWOODS

Financer:EC - European Commission
Program financ.:European Regional Development Fund
Akronim:TIGR4SMART

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Slovenia, Ministry of Education, Science, and Sport
Akronim:TIGR4SMART

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