Estimation of modulus of elasticity of Boscia angustifolia wood using longitudinal vibration acoustic method

摘要

This study aimed at estimating MOE of Boscia augustifolia wood using non-destructive longitudinal vibration acoustic method with the view to examining its reliability. Three trees of B. augustifolia were obtained, and samples of 20 x 20 x 300 mm3 werecollected for dynamic and static bending testing of the wood's elasticity. The samples were stored for a month prior testing after oven dried. Mean values of dynamic (dMOE) and static modulus of elasticity (sMOE) of B. augustifolia wood obtained were 6.908 ± 0.7525 GPa and 6.9148 ± 0.5870 GPa, respectively. Analysis done showed no significant difference between the values from the two methods while regression model was significant with 0.65 coefficient of determination. Strong correlation of 0.81 wasobserved between the dMOE and sMOE. Meanwhile, wood density had a correlation of 0.73 and 0.50 with dMOE and sMOE respectively. The acoustic method used was considered reliable for determining MOE of the wood.