Investigation of Mechanical Parameters and Defects of Solid Wood Glued Panels

Abstract

The group of glued wooden articles comprises glued beams, wooden panels and plywood. Glued joints may be considered as heterogenaus systems where the parameters of separate components greatly differ. The main reasons of low – quality gluing include insufficient compression strength and gluing temperature as well as greasy or unsuitably rough surface. Therefore, production of wooden articles and selection of suitable wood require knowledge not only on wood, but also on mechanical parameters of different joints, such as strength, stiffness, damping etc. In this paper the method and equipment of estimation of mechanical parameters of scantling panels is presented. Two types of panels were selected for the study. To study the effect of possible low – quality gluing and other defects, a defect in the panel was imitated by making an incision in the gluing zone. The resonance vibrations method was used for investigation.