Effect of board density and layer structure on the mechanical properties of bamboo oriented strandboard
Effect of board density and layer structure on the mechanical properties of bamboo oriented strandboard
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DOI：
10.1007/s10086-007-0893-9
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发表时间：
2007-06
影响因子：
2.9
通讯作者：
I. Sumardi;K. Ono;Shigehiko Suzuki
中科院分区：
文献类型：
--
作者：
I. Sumardi;K. Ono;Shigehiko Suzuki
本研究探讨了密度和层结构对毛竹（Phyllostachys pubescens）制造的刨花板机械性能和尺寸稳定性的影响。该刨花板是在实验室中以五种密度和三种不同结构制造的，包括随机取向同质板、单向取向同质板和具有交叉取向芯层（BOSB）的三层板。竹链排列分布可以使用 von Mises 分布函数来预测。弯曲性能随着密度的增加而增加，并受到层结构的影响。三层板平行方向的断裂模量（MOR）较随机板MOR显着提高；在垂直方向上，它表现出较小的强度下降。三层板的弹性特性可以利用单向板的弹性常数来预测。内结合强度（IB）受密度影响较大，但IB中未出现层状结构效应。对于随机板和三层板，每单位水分变化的线性膨胀范围为0.017至0.022；这些值与商业板的值相当或更低。
This study examined the effects of density and layer structure on the mechanical properties and dimensional stability of strandboard manufactured from moso bamboo (Phyllostachys pubescens). The strandboard was fabricated in a laboratory at five densities and three different structures including a randomly oriented homogenous board, a unidirectionally oriented homogenous board, and a three-layered board with a cross-oriented core layer (BOSB). Bamboo strand alignment distribution could be predicted using the von Mises distribution function. Bending properties increased with increasing density and were affected by layer structure. The modulus of rupture (MOR) of the threelayered board in the parallel direction increased remarkably compared with the random board MOR; in the perpendicular direction, it exhibited less strength reduction. Elastic properties of the three-layered board could be predicted using elastic constants of the unidirectional board. Internal bond strength (IB) was greatly affected by density, but the layer structure effect did not appear in IB. Linear expansion per unit moisture change ranged from 0.017 to 0.022 for random and three-layered boards; these values are comparable with or lower than values for commercial board.