Investigation of the effect of mechanical characteristics of production parameters on wood H20 beams

In this study, different types of composite wood I-beams were designed. Physical and mechanical properties of I-beam specimens designed from materials such as wood plastic composite (OPK), HDF and oriented particle board (OSB) have been determined and compared. According to the examination of physical properties; density values of OPK (1.560 g/cm3), HDF (0.663 g/cm3), OSB (0.586 g/cm3) and seats pine (0.514 g/cm3) were found. Polyurethane (PU) glue has been used in combination of three different beams designed from OPK, HDF and OSB. In these designed beams, bending resistance, bending elasticity modulus, bending shear rate and pressure resistance were investigated. In order to investigate the bending strength, modulus of elasticity, shear rate and shear strength of the adhesive used in the beams, beams designed from OPK were compared using PU grafted and polyvinyl acetate (PVA) grafts. It was determined that the beams with an OPK (7.030 N/mm2) and an OSB (6.886 N/mm2) beams had similar bending resistance values, while those with a contoured beam (8.770 N/mm2) had a higher bending strength. According to the effect of the glue type, it was found that the PU glue increased the bending resistance by 78%. The average flexural modulus (339.061 N/mm2) of the composite I beams joined with PU glue according to the elastic modulus calculation and contoured as trunk element was determined to be the lowest. The modulus (505.598 N/mm2) of the composite I beam, which is designed using PVA adhesive, was found to be the highest value. The shear resistance values of composite I beams using OPK (1.025 N mm2) and OSB (1.015 N/mm2) were close to each other when the shear resistance values were evaluated. Composite I beams designed with a contour line (1.307 N/mm2) were found to have higher slip resistance than the others. PU glue was found to increase the slip resistance value by 50% when compared to PVA glue. The highest value in pressure resistance comparison was found in beams designed from OPK (10.157 N/mm2). When the effect of PU glue and PVA glue on the pressure resistance was compared, it was found that using PU glue in the joints had less effect on the pressure resistance.