年轻木材比例对软木结构板密度和弹性模量的影响:一项初步研究
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Talitha O Rosa1, Setsuo Iwakiri1, Rosilani Trianoski1
1Universidade Federal do Paraná, Departamento de Engenharia Florestal, Av. Lothário Meissner, 632, Jardim Botânico, 80210-170 Curitiba, PR, Brazil.
Anais da Academia Brasileira de Ciencias
|June 21, 2023
概括
年轻木材 (JW) 影响结构板的性能. 具有特定比例旧木材 (色和绿色环) 的板材满足结构应用的最低弹性模量 (MOE) 要求.
科学领域:
- 木材科学和材料工程木材科学和材料工程
- 林产品研究 林产品研究
背景情况:
- 年轻木材 (JW) 与成熟木材相比,具有较差的物理和机械性能.
- 了解JW的影响对于优化结构板性能和材料利用至关重要.
研究的目的:
- 量化年轻木材比例对结构板密度和弹性模量 (MOE) 的影响.
- 确定最佳的木材年龄和颜色比例,以实现所需的结构板性能.
主要方法:
- 松树木被切割,生长环被颜色编码来表示年龄 (红色:0-6,蓝色:6.1-12,色:12.1-18,绿色:18.1-24,黄色:>24.1年).
- 每种颜色的比例使用软件在横板面积上进行分析.
- 弹性模块 (MOE) 通过非破坏性测试来确定.
- 用多个线性回归模型来分析数据.
主要成果:
- 含有至少57%色和绿色颜色木材 (代表年龄为12.1-24岁) 的板材实现了结构性使用的最低MOE.
- 没有红色 (未成年) 木材但含有绿色和黄色木材的板块超过7000 MPa MOE.
- 观察到一个明确的趋势,将木材年龄,颜色比例和MOE值联系起来.
结论:
- 木材年龄的比例和混合物 (用颜色表示) 显著影响结构板的MOE.
- 具有特定年龄特征的木材的战略选择 (例如,色和绿色环的比例较高) 对于生产高性能结构板来说至关重要.
- 这项研究为基于其年轻木材含量对结构板进行分类和优化提供了基础.
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