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Title: Modeling temperature effect on dynamic modulus of elasticity of red pine (Pinus resinosa) in frozen and non-frozen states

Source: Holzforschung, Volume 69, Number 2, 2015; pp. 233–240.

Author(s)Gao, Shan; Wang, Xiping; Wang, Lihai

Publication Year: 2015  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4714-1B

Abstract: The response of dynamic and static modulus of elasticity (MOEdyn and MOEsta) of red pine small clear wood (25.4 × 25.4 × 407 mm3) within the temperature range -40 to 40°C has been investigated. The moisture content (MC) of the specimens ranged from 0 to 118%. The MOEdyn was calculated based on measured ultrasonic velocity (V) and wood density. The MOEsta was measured by static bending tests in a climate chamber between -40 and 40°C. The results indicate that both MOEdyn and MOEsta were affected by temperature and the MC. Above freezing point, MOE decreased linearly at a slow rate with increasing temperature. Below freezing point, MOE increased at a rapid rate with decreasing temperature. The MC-level had a significant effect on the MOE-temperature relationships. Temperature effect was much more significant in green wood than in dry wood. Analytical models were developed to predict the change of MOEdyn relative to that at 20°C in the case of acoustic measurements under different temperature conditions.

Keywords: freezing point; ice formation; modulus of elasticity; moisture content; ultrasonic velocity

Publication Review Process: Formally Refereed

File size: 1,229 kb(s)

Date posted: 03/10/2015

This publication is also viewable on Treesearch:  view
RITS Product ID: 72387
Current FPL Scientist associated with this product
Wang, Xiping
Research Forest Products Technologist
  

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