Investigation on biomechanical properties of pinus nigra Using stress wave technique and resistography

Lotfi, Sana; Saadatnia, Mohammadali; Moradian, Mohammad Hadi; Pour Sartip, Ladan

doi:10.22092/ijwpr.2021.352921.1652

Document Type : Research Paper

Authors

¹ , MSc. in Dept. of Cellulose Technology Engineering, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran

² Assistant Prof., Dept. of Cellulose Technology Engineering, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran.

https://doi.org/10.22092/ijwpr.2021.352921.1652

Abstract

Ensuring the quality and stability of trees as the most important components of the plant community has attracted the attention of foresters to identify and measure defects and ensure safety coefficients. Therefore, in the present study, the use of acoustic tomography to calculate the extent of decay, the area of the woody section and the safety factor of black pine was studied. Acoustic tomography was performed using 16 sensors at two heights of 147 and 200 cm above the ground and on 8 tree specimens in the Sopron region of Hungary. The results showed that the stress wave technique was an accurate method for determining safety coefficients and determining the amount of internal decay in the tree and also had the ability to identify compression areas in cross section. Resistography of the studied sections in different geographical directions assisted to locating the woody areas, which was compatible with the information of acoustic tomography. The findings of this study showed that the area of the canopy has a significant role in the safety of the tree and the possibility of tree fall, so that in some trees due to their condition, with doubling the area of the canopy, the torque increased from 80827 to 161655 N.m and the condition of the tree changed from low-risk to high-risk.

Keywords

20.1001.1.17350913.1400.36.2.5.5

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Investigation on biomechanical properties of pinus nigra Using stress wave technique and resistography

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Volume 36, Issue 2 - Serial Number 75July 2021Pages 144-156

Volume 36, Issue 2 - Serial Number 75
July 2021
Pages 144-156