Origin of the biomechanical properties of wood related to the fine structure of the multi-layered cell wall.
Origin of the biomechanical properties of wood related to the fine structure of the multi-layered cell wall.
复制标题
木材生物力学特性的起源与多层细胞壁的精细结构有关。
DOI：
10.1115/1.1485751
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
J. Gril
中科院分区：
文献类型：
--
作者：
H. Yamamoto;Y. Kojima;T. Okuyama;W. Abasolo;J. Gril
本研究从木材细胞壁复合结构的角度，引入了一个基本模型来描述木材的生物力学特性。首先，纤维素微纤维（CMF）作为束框架和木质素半纤维素作为基质（MT）骨架在二次壁之间的机械相互作用是基于“两相近似”制定的。随后，使用新引入的模型模拟了(1)树木生长应力的起源，(2)木材的收缩或膨胀各向异性，以及(3)木材杨氏模量沿纹理的水分依赖关系。通过模型的制定；(1)估算了纤维素微纤维（CMF）和基质物质（MT）在细胞壁成熟过程中的行为；(2)考察了各细胞壁组分的水分反应性；(3)建立了成熟细胞壁精细复合结构的真实模型。因此，可以期望通过基于两相近似的木材宏观行为分析来估计每个细胞壁成分的精细结构和内部性质。
In this study, a basic model is introduced to describe the biomechanical properties of the wood from the viewpoint of the composite structure of its cell wall. First, the mechanical interaction between the cellulose microfibril (CMF) as a bundle framework and the lignin-hemicellulose as a matrix (MT) skeleton in the secondary wall is formulated based on "the two phase approximation." Thereafter, the origins of (1) tree growth stress, (2) shrinkage or swelling anisotropy of the wood, and (3) moisture dependency of the Young's modulus of wood along the grain were simulated using the newly introduced model. Through the model formulation; (1) the behavior of the cellulose microfibril (CMF) and the matrix substance (MT) during cell wall maturation was estimated; (2) the moisture reactivity of each cell wall constituent was investigated; and (3) a realistic model of the fine composite structure of the matured cell wall was proposed. Thus, it is expected that the fine structure and internal property of each cell wall constituent can be estimated through the analyses of the macroscopic behaviors of wood based on the two phase approximation.