Naslov (eng)

Transverse stress wave velocity in northern red oak tree: assessment of the wood quality

Autor

Živanović, Ivana
Todorović, Nebojša
Petrović, Danijela

Publisher

Opis (eng)

In this paper, the transverse wave velocity was investigated, as well as the possibility of assessing the quality of wood in northern red oak trees using the velocities of transverse stress waves. Stress wave velocity was recorded using a 2D acoustic tomograph with appropriate sensors and equipment. The recordings were made on a total of 18 sections on 9 trees from three northern red oak sites in Serbia. Based on the obtained results, it was concluded that the orientation of the annual ring in regard to the direction of sound propagation affects its speed. It was determined that the average stress wave velocity at the cross-sections is 1660 (1159-2350) m/s. However, it is higher in the tangential direction compared to the radial one. The relative difference between the reference and the measured speed was used to assess the quality of the wood. This relative difference indicates the amount of decay between the two sensors. The largest number of cross-sections had a speed loss of up to 10%, but there were also cross-sections with a speed loss of more than 30% in the radial direction. This result shows us that there are defects and damages in this direction that will reduce the strength of the wood, and thus narrow the field of use of wood from this part of the tree.

Jezik

engleski

Datum

2022

Licenca

© All rights reserved

Predmet

red oak, acoustic tomography, stress wave, assessment, transverse section

Deo kolekcije (1)

o:1347

Radovi Instituta za šumarstvo