期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 71, 期 2, 页码 134-144出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2010.11.007
关键词
Wood; Transport properties; Multiscale modeling
资金
- Austrian Research Promotion Agency (FFG) [815234/12791]
- Building with Wood within CEI-Bois
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.
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