Prediction of transport properties of wood below the fiber saturation point - A multiscale homogenization approach and its experimental validation Part I: Thermal conductivity
Prediction of transport properties of wood below the fiber saturation point - A multiscale homogenization approach and its experimental validation Part I: Thermal conductivity
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DOI：
10.1016/j.compscitech.2010.11.007
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发表时间：
2011-01-17
影响因子：
9.1
通讯作者：
Hofstetter, K.
中科院分区：
文献类型：
--
作者：
Eitelberger, J.;Hofstetter, K.
这两部分的文件涵盖了木材宏观输运特性的多尺度均匀化模型的开发和验证。出发点是木材的内在结构层次，这是由几个均质化步骤。从几纳米的长度尺度开始，模型最终通过包括中间层次的形态而具有宏观性质。在第一部分中，这是基于六级均匀化方案对热导率进行的。所使用的均匀化技术是连续微观力学的自洽和Mori-Tanaka计划。模型验证依赖于统计和物理独立的实验：基于组织无关性的多尺度均匀化模型预测的宏观导热系数值半纤维素，纤维素，木质素，和水（输入数据集I）用于组织特异性数据（输入数据集II）与相应的实验确定的组织特异性电导率值（实验数据集）进行比较。(C)2010爱思唯尔有限公司版权所有。
This two-part paper covers the development and validation of a multiscale homogenization model for macroscopic transport properties of wood. The starting point is the intrinsic structural hierarchy of wood, which is accounted for by several homogenization steps. Starting on a length scale of a few nanometers the model ends up with macroscopic properties by including the morphology of the intermediate hierarchical levels. In this first part this is done for thermal conductivity, based on a six-level homogenization scheme. The used homogenization technique is continuum micromechanics in terms of self-consistent and Mori-Tanaka schemes. Model validation rests on statistically and physically independent experiments: the macroscopic thermal conductivity values predicted by the multiscale homogenization model on the basis of tissue-independent (universal) phase conductivity properties of hemicellulose, cellulose, lignin, and water (input data set I) for tissue-specific data (input data set II) are compared to corresponding experimentally determined tissue-specific conductivity values (experimental data set). (C) 2010 Elsevier Ltd. All rights reserved.