UBC Undergraduate Research

Using MFA and density values of White Spruce to develop a prediction model for wood static bending strength Dhadwal, Daksh


This study concentrates on establishing a prediction model for the MOE of tree species White Spruce by analysing the MFA and density values of about 159 samples. Clear specimens measuring 25.4 mm X 25.4 mm X 406.4 mm (1”X1”X16”) were tested for bending strength and stiffness during summer of 2008. The data was then used to calculate the stiffness or MOE (Modulus of Elasticity) and strength or MOR (Modulus of Rupture). Further analysis of the samples was carried out to obtain density and MFA (Micro Fibril Angle). A correlation was then drawn up between the MOE, Density and MFA values. Samples were scanned for density from pith to bark by an X-ray densitometer. MFA was calculated using a Bruker D8 Discover X-Ray Diffractometer. All the measurements were carried out in metric units. The correlation between the MOE and Density was found to be 0.22 and between MOE and MFA was 0.34. The combined correlation of MOE with Density and MFA was 0.43. MOE and MOR were found to have a correlation value of 0.66.

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