Yildirim, Mehmet Nuri; Yasar, Sekip Sadiye; Karaman, Abdurrahman

In this study, determining the impact of biscuit-type joining elements produced in 3-D printers on the bending moment resistance was aimed in “L” type corner joining. For this purpose, wood-based material 18 mm thick MDF-lam, woodbased biscuit, Acrylonitrile Butadiene Styrene (ABS) and Polylactic Acid (PLA) produced with 3-D printer, biscuit joining elements obtained from thermoplastic based filaments are used. Test samples, according to (ASTM D 1037-06a, 2006) standards were subjected to; diagonal tensile and compression moment tests. According to the experiment results, the tensile moment values was determined to be higher than the compression moment values. The wood-based biscuit joining element has the highest values, the wood-based biscuit joining element was followed by the biscuit assembly elements obtained respectively from PLA and ABS-based materials produced in 3-D printer in the compression test; while the wood-based biscuit joining element has the highest values in the tensile test, this was followed by ABS and PLA biscuit joining elements. In the tensile test, it was observed that the biscuit joining elements produced with 3-D printer technology gave close values to the wood based biscuit joining element and that these elements can be used as an alternative to the wood-based biscuit element for the corner joining of the furniture elements.

Yildirim, Mehmet Nuri; Yasar, Sekip Sadiye; Karaman, Abdurrahman

The purpose of this study is to determine the effects of the nano-particulate silicon dioxide (SiO2) material on the bending strength and modulus of elasticity in bending of some wood species. Oriental beech (Fagus orientalis L.) and sessile oak (Quercus petrea L.) woods species which are commonly used in the furniture industry were used in this study. Impregnation was carried out with the preparation of SiO2 at concentrations of 1% and 3% according to ASTM-D 1413-76 (1976) standards. According to the results, while solution concentration was increasing in both wood species, total retention (kg/m3) and percentage retention (%) values increased; air dry density (12%), bending strength and modulus of elasticity in bending decreased. The maximum mean values of bending strength and modulus of elasticity was in control samples of oriental beech and the minimum were in sessile oak wood with 3% concentration. These results can be related to the fact that the higher density of oriental beech wood (0.630-0.685 g/cm³). In both species of wood, impregnation with SiO2 resulted loss of about 3-5% in bending strength and 0.6-9% in modulus of elasticity.