Moisture content estimation of green softwood logs of three species based on measurements of flexural vibration

Abstract The moisture contents of sugi ( Cryptomeria japonica ), todomatsu Abies sachalinensis ) and hinoki Chamaecyparis obtusa logs were estimated using a method content estimation proposed in our previous study. In the course estimation, it was revealed that regression line correlation between specific dynamic Young’s modulus E / ρ tangent loss (tan δ green wood different from moisture-conditioned showed species dependency, both which are not previously reported. Regression lines at fiber saturation point (FSP) constructed for each by measuring tan flexural vibration small specimens correcting values their own into FSP. this study reported studies near correlations similar, whereas those despite no report dependency air-dried wood. 86 (not used to prepare specimens) species. standard deviation difference measured 15.7%. A systematic error 25.9% attributed methods specimen support logs.