Bending of Sawn Wood Products Obtained from Conventional Sawing and Parallel to Generatrix Sawing

Abstract

This paper considers bending of sawn wood products obtained from logs by conventional sawing and sawing parallel to generatrix. Issues related to strength and stiffness of sawn wood products sawn parallel to generatrix have not being studied yet, thus such issues are of practical and scientific interest. Earlier our investigation dealt with changes in tilting angle of wood fiber of sawn wood materials obtained from logs by conventional sawing and sawing parallel to log generatrix. This concept is used for generating of mathematical models describing changes in elasticity modulus across the wood plank width which enables to foresee the wood plank bending strength and stiffness. The proposed procedure allows for the evaluation of wood planks bending stresses occurred when various log sawing schemes were used. Wood planks bending value is calculated to cover the difference between stiffness of wood planks obtained at the implementation of both sawing schemes. The investigation results are not only of scientific interest, but are also of practical interest in terms of construction and fabrication of laminated wood structures, wood structural panels etc.