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Öğe The effect of edge banding thickness of some trees on withdrawal strength of beech dowel pins in composite material(2011) Yapici, F.; Likos, E.; Esen, R.Composite materials and wooden dowels are being used increasingly in the construction of furniture frames and inner decoration. Yet there is little information available concerning the withdrawal strength of various fasteners, and, in particular, dowels in composite materials edged solid wood edge bandings. The aim of this study was to determine the withdrawal strengths of 6, 8, 10 mm diameter dowels produced from beech with respect to edge of a medium-density fiberboard (MDF) or particleboard (PB) edged with 5,10 and 15 mm thickness of solid wood edge banding of scotch pine, oriental beech and lime tree, bonded with hot-melt, poly (vinyl acetate) (PVAc) and Desmodur-VTKA (D-VTKA), a polyurethane based one-component adhesive. The effects of edge banding thickness, dimension of dowels, type of composite materials and type of adhesives used for edge banding on the withdrawal strength were determined. The highest (6.68 N.mm-2) withdrawal strength was obtained in beech dowels with 8 mm diameter for MDF with 5 mm thickness of solid wood edge banding of bonded beech with D-VTKA adhesive.Öğe Effect of tenon geometry, grain orientation, and shoulder on bending moment capacity and moment rotation characteristics of mortise and tenon joints(Society of Wood Science and Technology, 2012) Likos, E.; Haviarova, E.; Eckelman, C.A.; Erdil, Y.Z.; Ozcifci, A.Bending moment capacity and moment rotation characteristics of mortise and tenon joints as a function of tenon geometry, grain orientation, length, and shoulder fit were examined. Bending moment capacity of all joints in which tenons were fully inserted in mortises was 54% greater than for joints in which tenons were not fully inserted. Jointswith 25.4-mm-long diamond-shaped tenons had greater moment capacity than either rectangular or round tenon joints, whereas joints with 38- or 51-mm-long rectangular tenons had greater capacities than jointswith diamond or round tenons. Similarly, for joints inwhich tenonswere not fully inserted, rectangular tenons had the greatest moment capacity regardless of grain orientation or length. © 2012 by the Society of Wood Science and Technology.Öğe Technical note: Static versus cyclic load capacity of side chairs constructed with mortise and tenon joints(2013) Likos, E.; Haviarova, E.; Eckelman, C.A.; Erdil, Y.Z.; Ozcifci, A.The effect of cross-sectional tenon geometry on static and cyclic load capacity of side chairs constructed with round-, rectangular-, and diamond-shaped mortise and tenon joints was investigated. Cyclic load capacity averaged about two-thirds of static load capacity for the joint configurations tested. For the configurations included in the test, chairs with mortise and tenon joints constructed with round-, rectangular-, and diamond-shaped tenons had static load to cyclic passing load ratios of 56.5, 66.8, and 69.2% for rectangular-, round-, and diamond-shaped tenons, respectively. These results indicate that useful relationships existed between static and cyclic performance of round mortise and tenon joints, which may simplify the design process for chairs that must pass cyclic performance tests. © 2013 by the Society of Wood Science and Technology.
