NDLI: Viscoelasticity of wood cell walls with different moisture content as measured by nanoindentation

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Siqun Young, Timothy M. Xia, Yuzhi Meng, Yujie Cai, Zhiyong
Copyright Year	2015
Abstract	Instrumental indentation was performed on wood cell walls to measure the cell walls’ mechanical properties and creep behaviour over a range of various steady moisture conditions. The wood cell walls’ Young’s modulus and hardness were found to negatively correlate with moisture content. Theoretical modeling with Burgers model and finite element analysis with the Generalized Maxwell model were used to simulate the process of nanoindentation separately and to gain insight into the response of viscoelastic materials. The Young’s modulus extracted using Burgers model was lower than the values obtained using the Generalized Maxwell model and Oliver–Pharr method, indicating that creep happened during the indentation loading process. The extracted parameters from both models exhibited negative trends with increasing moisture content. Both models confirmed an intuitive understanding of creep in viscoelastic wood cell walls, which reflects previous basic information about the composite structure of wood cell walls and their rheological properties.
Starting Page	47538
Ending Page	47547
Page Count	10
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	5
Issue Number	59
Journal	RSC Advances
DOI	10.1039/c5ra05822h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Finite element method Viscoelasticity Pharr Wood Oliver Rheology Nanoindentation Generalized Maxwell model Hardness Dislocation creep
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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