论文标题
结及其对木材拉伸强度的影响：案例研究
Knots and their effect on the tensile strength of lumber: a case study
论文作者
论文摘要
在评估用于工程应用的锯齿木材的强度时，结的尺寸和位置是一个重要的考虑因素。结是木材的最常见的视觉特征，这是树枝的生长所致。众所周知，较大的单个结和不同结的簇具有降低力量的效果。但是，在某种程度上，通过主观判断，尤其是结的空间相互作用及其与木材强度的关系，通过主观判断来告知打结的行业评分规则。该案例研究报告了一个实验的结果，该实验研究并模拟了结对道格拉斯冷杉木材样品的强度还原作用。通过对木材表面进行扫描并应用拉伸强度测试获得实验数据。介绍的建模方法将所有相关的结信息包含在贝叶斯框架中，从而贡献了一种管理制成木材质量的更精致的方法。
When assessing the strength of sawn lumber for use in engineering applications, the sizes and locations of knots are an important consideration. Knots are the most common visual characteristics of lumber, that result from the growth of tree branches. Large individual knots, as well as clusters of distinct knots, are known to have strength-reducing effects. However, industry grading rules that govern knots are informed by subjective judgment to some extent, particularly the spatial interaction of knots and their relationship with lumber strength. This case study reports the results of an experiment that investigated and modelled the strength-reducing effects of knots on a sample of Douglas Fir lumber. Experimental data were obtained by taking scans of lumber surfaces and applying tensile strength testing. The modelling approach presented incorporates all relevant knot information in a Bayesian framework, thereby contributing a more refined way of managing the quality of manufactured lumber.
