Related Links
Investigation on biomechanical properties of pinus nigra Using stress wave technique and resistography | ||
| تحقیقات علوم چوب و کاغذ ایران | ||
| Article 6, Volume 36, Issue 2 - Serial Number 75, July 2021, Pages 144-156 PDF (1.28 M) | ||
| Document Type: Research Paper | ||
| DOI: 10.22092/ijwpr.2021.352921.1652 | ||
| Authors | ||
| Sana Lotfi* 1; Mohammadali Saadatnia2; Mohammad Hadi Moradian2; ladan pour sartip3 | ||
| 1, MSc. in Dept. of Cellulose Technology Engineering, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran | ||
| 2Assistant Prof., Dept. of Cellulose Technology Engineering, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran. | ||
| 3Assistant Prof., Dept. of Cellulose Technology Engineering, Faculty of Natural Resources, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran. | ||
| 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 | ||
| Compression wood; Acoustic tomography; Stress wave; Resistography | ||
| References | ||
|
-Barnnet j.R., and Jeronimidis, G., 2003. Wood Quality and Its Biological Basis. Blackwell Scientific Publisher, Oxford, 226p. -Bieker, D. and Rust, S., 2010. Non-destructive estimation of sapwood and heartwood width in Scots pine (Pinus sylvestris L.). Silva Fennica, 44(2): 267-273. -Brancheriau, L., Saadat-Nia, M.A., Gallet, P., Lasaygues, P., Pourtahmasi, K. and Kaftandjian, V., 2012. Ultrasonic imaging of reaction wood in standing trees. Acoustical Imaging, Springer, 31(5): 399-411. -Bucur, V., and Chivers, R.C., 1991. Acoustic properties and anisotropy of some Australian wood species. Acta Acustica United with Acustica, 75(1): 69-74. -Bucur, V., 2006. Acoustic of Wood. Springer Series in Wood Science, 387p. -Bucur, V., 2010. Acoustic tomography for tension wood detection in eucalypts: 255-268. In: Bucur, V., (Eds.). Delamination in Wood, Wood Products and Wood-Based Composites. Springer, Heidelberg, 401p. -Du, X., Li, S., Li, G., Feng, H. and Chen, S., 2015. Stress wave tomography of wood internal defects using ellipse-based spatial interpolation and velocity compensation. BioResources, 10(3): 3948-3962. -Fundova, I., Funda, T. and Wu, H.X., 2018. Non-destructive wood density assessment of Scots pine (Pinus sylvestris L.) using Resistograph and Pilodyn. PloS One, 13(9): 1-16. -Goncz, B., Divos, F. and Bejo, L., 2017. Detecting the presence of red heart in beech (Fagus sylvatica) using electrical voltage and resistance measurements. Springer, 76(2): 679-686. -Green D., Winandy J. and kretschmann D., 1999. Mechanical properties of wood: 100-146. In: Department of Agriculture., (Eds.). Wood Handbook, Wood as an Engineering Material. Forest Service, United States, 509p. -Johnstone, D., Moore, G., Tausz, M. and Nicolas, M., 2010. The measurement of wood decay in landscape trees. Arboriculture & Urban Forestry, 36(3): 121-127. -Kasal, B., Lear, G. and Tannert, T., 2011. Stress Waves: 5-24. In: kasal, B. and Tannert, T., (Eds.). In Situ Assessment of Structural Timber. Springer, Berlin, 123p. -Kazemi-najafi, S., 2016. Nondestructive evaluation of standing trees. Tarbiat modares university press, Tehran, 436p. -Li, L., Wang, X., Wang, L. and Allison, R.B, 2012. Acoustic tomography in relation to 2D ultrasonic velocity and hardness mappings. Wood Science and Technology, 46(1-3): 551-561. -Liang, S. and Fu, F., 2012. Strength loss and hazard assessment of Euphrates poplar using stress wave tomography. Wood and Fiber Science, 44(1): 54-62. -Nia, M.A.S., Enayati, A.A., Brancheriau, L. and Pourtamasi, K., 2012. Investigation the acoustic behavior of poplar and spruce species reaction wood using ultrasonic technique. Iranian Journal of Wood and Paper Science Research, 27(2): 306-318. -Ostrovský, R., Kobza, M. and Gažo, J., 2017. Extensively damaged trees tested with acoustic tomography considering tree stability in urban greenery. Springer, 31(3): 1015-1023. -Roohnia, M., Jahan latibari, A., Behzad, B., Zarrinmehr, J., Kohantorabi, M., Manouchehri, N. and Tajdini, A., 2017. Development of tomographic technology (case study: trees from Karaj city). Iranian Journal of Wood and Paper Science Research, 33(1): 100-111. -Saadat Nia, M.A., Brancheriau, L., Enayati, A.K., Pourtahmasi, K. and Honarvar, F., 2011. Ultrasonic wave parameter changes during propagation through poplar and spruce reaction wood. Bioresources, 6(2): 1172–1185. -Schubert, S., Gsell, D., Dual, J., Motavalli, M. and Niemz, P., 2009. Acoustic wood tomography on trees and the challenge of wood heterogeneity. Holzforschung, 63(1): 107-112. -Wang, X., Allison, R.B., Wang, L. and Ross, R.J., 2007. Acoustic tomography for decay detection in red oak trees. Department of Agriculture, Forest Service, Forest Products Laboratory. 642: 1-7. | ||
|
Statistics Article View: 448 PDF Download: 327 |
||
Journal management system. designed by sinaweb