Abstract
To determine the viscoelasticity of wood three-dimensionally, a longitudinal tensile creep test was conducted on 12 species of wood to examine the change in the rate of volume increase (ΔV/V) with time. Immediately after the beginning of creep, ΔV/V was positive, and during creep, ΔV/V decreased rapidly, then more gradually. The decrease in tangential strain was considered to mainly contribute to the decrease in ΔV/V during creep. Immediately after the removal of the load, ΔV/V decreased to a negative value; thereafter, it decreased slowly and finally reached a certain value. The value of ΔV/V during creep tended to decrease with increasing density of wood. Also, there was a negative correlation between wood density and the rate of increase in ΔV/V.
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Taniguchi, Y., Ando, K. Time dependence of Poisson’s effect in wood II: volume change during uniaxial tensile creep. J Wood Sci 56, 350–354 (2010). https://doi.org/10.1007/s10086-009-1100-y
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DOI: https://doi.org/10.1007/s10086-009-1100-y