ABSTRACT

Bamboo-wood composite container flooring (BWCCF), as a low-cost, sustainable, and eco-friendly product, plays an increasing role in the container flooring industry. In this paper, the structural characteristics of radial bamboo slivers (RBS) from different locations of bamboo culms were studied. Furthermore, the mechanical performance and failure mechanisms of 17-layer BWCCF, made of radial bamboo sliver curtains from the top (top-CF), middle (middle-CF), and bottom (bottom-CF) sections of bamboo culms, were evaluated. It was found that the geometry of the top-RBS was more irregular than the middle and bottom-RBS resulting in more structural defects of the top-CF and higher standard deviation of its mechanical properties. Except for the MOE, the top-CF is 7.0% lower than the middle-CF, there is a small difference between the strengths of the top and middle-CF. Since lower fiber volume fraction and larger bamboo node numbers of bottom-RBS, the density, concentrated load, modulus of elasticity (MOE), modulus of rupture (MOR), and shear strength parallel to grain (fs||) of the middle-CF are 6.3%, 3.3%, 7.3%, 14.7%, and 3.1%, respectively higher than those of bottom-CF. The failure modes of concentrated load for the top, middle, and bottom-CF were different mainly because the number of RBS included in corresponding RBSC was different.

摘要

竹木复合集装箱地板（BWCCF）作为一种低成本、可持续、环保的产品，在集装箱地板行业中发挥着越来越大的作用。在本文中，研究了来自竹子不同位置的放射状竹条（RBS）的结构特征。此外，还评估了 17 层 BWCCF 的力学性能和失效机制，该结构由竹子顶部 (top-CF)、中间 (middle-CF) 和底部 (bottom-CF) 部分的径向竹条帘制成. 结果发现，top-RBS 的几何形状比 middle 和 bottom-RBS 更不规则，导致 top-CF 的结构缺陷更多，其机械性能的标准偏差更高。除了 MOE，top-CF 比 middle-CF 低 7.0%，顶级 CF 和中级 CF 的强度之间存在细微差别。由于底部-RBS 较低的纤维体积分数和较大的竹节点数，中间的密度、集中载荷、弹性模量 (MOE)、断裂模量 (MOR) 和平行纹理剪切强度 (fs||) CF分别比bottom-CF高6.3%、3.3%、7.3%、14.7%和3.1%。顶部、中部和底部CF的集中载荷失效模式不同主要是由于相应RBSC中包含的RBS数量不同。分别高于 bottom-CF。顶部、中部和底部CF的集中载荷失效模式不同主要是由于相应RBSC中包含的RBS数量不同。分别高于 bottom-CF。顶部、中部和底部CF的集中载荷失效模式不同主要是由于相应RBSC中包含的RBS数量不同。