Estimating mechanical properties of clear wood from ten‐year‐old Melia azedarach trees using the stress wave method
Estimating mechanical properties of clear wood from ten‐year‐old Melia azedarach trees using the stress wave method
复制标题
使用应力波法评估十年苦楝树的透明木材的机械性能
DOI：
10.1007/s00107-021-01664-8
复制
发表时间：
2021
影响因子：
2.6
通讯作者：
D. Ridley
中科院分区：
文献类型：
--
作者：
Doan Van Duong;D. Ridley
本研究的目的是探讨应力波速度（SWV）作为一种快速和非破坏性的方法来估计的力学性能ofMelia azedarachwood的潜力。测定了90个20 × 20 × 320 mm的10年生杉木干材的SWV、动态弹性模量（MOEd）、弹性模量（MoE）、抗弯强度（莫尔）和密度。苦楝，并在20°C、60%相对湿度（水分含量约12%）的环境平衡下测试。SWV和莫伊之间存在统计学显著性（0.1%水平）但弱相关性（R2= 0.23），但未发现SWV和莫尔之间存在统计学显著性相关性。对M.当SWV和木材密度（WD）一起使用时，通过在空气干燥条件下计算MOE（莫伊：R2= 0.76，莫尔：R2= 0.47），得到苦楝木，尽管在莫尔的情况下，基于单独WD的模型稍好（R2= 0.58），并且WD也几乎与MOE一样好用于预测莫伊。结果表明，SWV与WD的耦合可以作为评价M的力学性能的预测参数。在生产过程中使用苦楝木，尽管单独使用WD也有效。由于在该水分含量下莫伊几乎与WD成正比，因此单独的SWV将是无用的。
The objective of this study was to examine the potential of stress wave velocity (SWV) as a rapid and non-destructive method to estimate the mechanical properties ofMelia azedarachwood. The SWV, dynamic modulus of elasticity (MOEd), modulus of elasticity (MOE), modulus of rupture (MOR, bending strength) and density were determined on ninety 20 ⋅ 20 ⋅ 320 mm clear wood specimens, obtained from stems of three ten-year-oldM. azedarachtrees, and tested at environmental equilibrium in 20°C, 60 % relative humidity (a moisture content of approximately 12 %). There was a statistically significant (0.1 % level) but weak correlation (R2= 0.23) between the SWV and MOE, but no statistically significant correlation was found between the SWV and MOR. Much better results for prediction of static properties ofM. azedarachwood were obtained when SWV and wood density (WD) were used together through calculation of MOEdin the air-dry condition (MOE: R2= 0.76, MOR: R2= 0.47), although in the case of MOR a model based on WD alone is slightly better (R2= 0.58), and WD is also almost as good as MOEdfor predicting MOE. It is concluded that SWV coupled with WD can be employed as a predicting parameter to evaluate the mechanical properties ofM. azedarachwood during the manufacturing process, although WD alone is also effective. The SWV alone would not be useful due to MOE being almost directly proportional to WD at this moisture content.