Studies of Screw Behavior in Modified Wood

The article describes the research devoted to the study of the behavior of the screw in solid wood, modified with a composition based on dimeacrylic polyester. Comparative indicators of the value corresponding to the force of pulling out a screw from an array of pure and modified wood are given. The influence of the angle of inclination of the screw on the force of pulling out the screw from an array of modified wood has been studied. The technology of modification of wood samples for testing the screw for pulling out and equipment that allows modifying wood and curing samples for testing are given. A model for the modernization of the testing machine is proposed, which makes it possible to carry out research on pulling out at different angles of inclination of the screw to the axes of wood anisotropy. Comparative results of numerical and experimental studies are presented. On the basis of the experiments carried out, it was found that the modification of wood can significantly increase the bearing capacity of the screw for pulling out of solid wood both at an angle of 90 degrees with the wood anisotropy axes, and at different angles of inclination.