ABSTRACT

The present research work had the goal of assessing the use of ultrasound for determining the physical-mechanical properties of clear wood in Eucalyptus camaldulensis from a 5-year-old forest stand located in the municipality of Sinop, Mato Grosso State, Brazil. The selection of trees was carried out according to the diameter at breast height (DBH) and height (H). Forty trees were harvested and a 2 m long log was obtained from each tree for the assessment of physical-mechanical properties. In physical properties, the specific gravity, shrinkage (radial, tangential and volumetric) and anisotropic factor were determined. The dynamic modulus of elasticity (MOE) was estimated by ultrasound applied in the longitudinal direction of the samples. The highest correlation with the mechanical test results was found for dynamic MOE, with R² values in the range of 0.30–0.75. Wood density was highly positively correlated with the dynamic MOE of the wood. The use of ultrasound as a non-destructive method was feasible to determine the selected physical-mechanical properties of Eucalyptus camaldulensis wood as a function of propagation speed and the MOE dynamic in most of the assays.

摘要

目前的研究工作的目标是评估使用超声波来确定桉树中透明木材的物理机械特性来自巴西马托格罗索州锡诺普市一个 5 年历史的林分。树木的选择根据胸高（DBH）和高度（H）的直径进行。收获了 40 棵树，并从每棵树上获得了 2 m 长的原木，用于评估物理机械特性。在物理特性方面，确定了比重、收缩率（径向、切向和体积）和各向异性因子。动态弹性模量 (MOE) 是通过在样品的纵向方向上施加的超声波来估计的。动态 MOE 与机械测试结果的相关性最高，R ²0.30–0.75 范围内的值。木材密度与木材的动态 MOE 呈高度正相关。在大多数分析中，使用超声波作为一种非破坏性方法来确定作为传播速度和 MOE 动态的函数的桉树木材的选定物理机械特性是可行的。