期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 42, 期 6, 页码 677-685出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2011.02.007
关键词
Wood; Mechanical properties; Analytical modeling; Nanoindentation
资金
- Austrian Research Promotion Agency [815234/12791]
- wood industry partnership Building with Wood within CEI-Bois
Nanoindentation is a well known tool for identification of mechanical properties at the micrometer scale of materials. When applied to study wood cell walls the commonly used isotropic indentation theory is not applicable. In this study, anisotropic nanoindentation theory was employed for analyzing nanoindentation test results on wood cell walls. The influence of elastic stiffness components, microfibril angle, and cell wall composition on the indentation modulus was studied. The indentation modulus was found to depend on longitudinal, transverse, and shear modulus to a similar extent. A significant influence of the microfibril angle on the indentation modulus was observed and discussed with respect to experimental scatter and sample preparation. It is concluded, that application of anisotropic nanoindentation theory provides a tool for quantitative instead of qualitative investigation of wood cell walls, with the goal of identifying all elastic properties of the transversely isotropic cell wall from nanoindentation tests. (C) 2011 Elsevier Ltd. All rights reserved.
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