Abstract:

With the software of ANSYS for finite element analysis, the bending strength of Pinus sylvestris var. mongolica finger-jointed lumber for structural use under three different fitness ratio were modeled to realize the nondestructive test of the properties of finger-jointed lumber. According to the modeling results, the bending strength are 78.0, 72.0 and 45.0 MPa respectively when the fitness ratio is 0, 0.1 and 0.3 mm. Comparing the modeling results with the experimental results, it indicated that the bending strength from the modeling result is approximately 20% larger than that of the experimental test results. The discrepancy may caused by the neglection of the decrease of fitness ratio due to the shrinkage of the finger-joints after being cut. So it is necessary for the models to be modified to minimize the existed discrepancy.

Key words: Pinus sylvestris var. mongolica, finger-jointed lumber, bending strength, finite element method