Method for substitute modulus determination of furniture frame construction joints

The goal of the performed experiments was to determine the strength, stiffness, and modulus of the elasticity of dowel,mortise and loose-tenon, and mortise and tenon L-type furniture joints under diagonal tension and compression loads. The specimenswere constructed from Turkish beech (Fagus orientalis L.), white oak (Quercus alba), and white walnut (Juglans cinerea L.) and wereassembled with a water-resistant PVAC adhesive. According to the obtained results, the highest stiffness/strength values were estimatedin mortise and tenon joints constructed of white oak, whereas dowel joints constructed from Turkish beech showed the lowest stiffness/strength and deformability. The elasticity modulus of the experimental joints expressed their stiffness better than the stiffness coefficient.The accuracy of the developed elasticity modulus model of the examined joints was verified positively both by experimental studies andnumerical calculations