Mechanical behaviour of wood compressed in radial direction:Part II. Influence of temperature and moisture content

Chen Huang; Yinghei Chui; Meng Gong; Felisa Chana

doi:10.1016/j.jobab.2020.10.005

Volume 5 Issue 4

Nov. 2020

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Chen Huang, Yinghei Chui, Meng Gong, Felisa Chana. Mechanical behaviour of wood compressed in radial direction:Part II. Influence of temperature and moisture content[J]. Journal of Bioresources and Bioproducts, 2020, 5(4): 266-275. doi: 10.1016/j.jobab.2020.10.005

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Chen Huang, Yinghei Chui, Meng Gong, Felisa Chana. Mechanical behaviour of wood compressed in radial direction:Part II. Influence of temperature and moisture content[J]. Journal of Bioresources and Bioproducts, 2020, 5(4): 266-275. doi: 10.1016/j.jobab.2020.10.005

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Mechanical behaviour of wood compressed in radial direction:Part II. Influence of temperature and moisture content

doi: 10.1016/j.jobab.2020.10.005

a.
Wood Science & Technology Centre, University of New Brunswick, Fredericton, NB, E3C 2G6, Canada
b.
Department of Civil & Environmental Engineering, University of Alberta, Edmonton, AB, T6G 1H9, Canada
c.
Faculty of Forestry & Environmental Management, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada

Funds: This work was founded by a grant from the Natural Sciences and Engineering Research Council of Canada and New Brunswick Innovation Foundation. Their support is acknowledged greatly

More Information

Corresponding author: Chen Huang, E-mail address:chen.huang@unb.ca
Received Date: 2020-04-30
Accepted Date: 2020-07-08
Rev Recd Date: 2020-06-04

Available Online: 2020-10-09

Publish Date: 2020-10-01

Abstract

Abstract

This study investigated the influence of pressing temperature and moisture content on the mechanical properties of wood compressed in radial direction. Jack pine (Pinus banksiana) and balsam poplar (Populus balsamifera) specimens were tested under a combination of pressing temperature (20℃, 55℃, 90℃, and 125℃) and wood moisture content (2%, 7%, 12%, and 17%). The yield stress (σ_y) and modulus of elasticity (MOE) of the specimens were determined from the stress-strain response. It was found that an increase in either pressing temperature or moisture content of wood generally caused a decrease in the mechanical properties for both species. The t-test results revealed that jack pine specimens are more sensitive to changes in pressing temperature and wood moisture content than balsam poplar. For jack pine specimens, at any of the pressing temperatures, the moisture content of 12% was found to be a crucial level to start a significant decrease in σ_y and MOE, while at any of the moisture content, a change in temperature from 55℃ to 90℃ exhibited a significant change in σ_y and MOE. The regression models developed can be used to predict σ_y and MOE as a function of temperature and moisture content.
- compression in radial direction,
- yield stress,
- modulus of elasticity,
- pressing temperature,
- wood moisture content,
- stress-strain curve

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References(40)

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