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Title: Effect of Moisture Sorption State on Vibrational Properties of Wood

Source: Wood. Forest Prod. J. Volume 62, Number 3. pp. 171–176. 2012.

Author(s)Lu, Jianxiong; Jiang, Jiali; Wu, Yiqiang; Li, Xianjun; Cai, Zhiyong

Publication Year: 2012  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-1B

Abstract: The purpose of this study was to investigate the vibrational properties and corresponding anisotropicity in wood during different states of moisture sorption. Samples of maple (Acer spp.) and red oak (Quercus rubra Michx.f.) were moisture conditioned by the adsorption process from an ovendried state and by the desorption process from a water-saturated state. The dynamic modulus of elasticity (DMOE) and logarithmic decrement (δ) were examined as a function of grain orientation during moisture change processes and under constant moisture contents (MC). It was observed that regardless of species and grain direction, the DMOE and δ were lower and higher, respectively, during the moisture change process compared with those measured without a change in MC. The increase in δ value during adsorption was greater than that during desorption. These results suggest that wood in an unstable state shows lower elasticity and strength and higher damping properties than wood in an equilibrium state. Furthermore, results of this study demonstrate that a greater adsorption rate leads to greater destabilization during an adsorption process. The anisotropy in vibrational properties was found to vary between two species.

Keywords: moisture sorption; vibrational properties; Wood

Publication Review Process: Formally Refereed

File size: 627 kb(s)

Date posted: 01/14/2013

This publication is also viewable on Treesearch:  view
RITS Product ID: 63037
Current FPL Scientist associated with this product
Cai, Zhiyong
Supervisory Research Materials Engineer
  

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