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Measurement of the dynamic modulus of elasticity of wood panels |
| LIU Zhenbo, LIU Yixing, YU Haipeng, YUAN Junqi |
| Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China |
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Abstract This study investigated the dynamic modulus of elasticity (DMOE) of wood panels of Fraxinus mandshurica, Pinus koraiensis, and Juglans mandshurica using the natural frequency measurement system of fast Fourier transform (FFT). The results were compared with the static modulus of elasticity (ES) tested by a mechanical test machine. The results show a significant correlation between ES, transverse vibration DMOE (EF), and longitudinal vibration DMOE (EL). For all of these species, the correlation between ES, EF and EL is more significant than the individual species, which indicated that the FFT method is universal. The correlations between Es and sample s density (ρ) are significant, but the correlation coefficient of ES and ρ is lower than those between EF, EL and ES. The ES of wood is more accurately tested by the analysis based on FFT measurement than by the estimation based on density.
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Issue Date: 05 December 2006
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