Determination of bending moment resistance of t-type joints constructed with wood biscuit

Document Type : Research Paper

Authors

Abstract

The goal of this study was to investigate effects of wood species (Beech and Fir), number of connectors (1 and 2), size of biscuit (10 and 20) and type of adhesives (Polyvinyl acetate (PVAc), polyurethane (PU) and urea-formaldehyde (UF)) on bending moment resistance of joints fabricated with biscuit. Results have shown that member of joint, number of connector, size of biscuit and type of adhesive had significant effect on the bending moment resistance. Bending moment resistance of joints made of Beech wood were stronger than joints made of Fir ones. Bending moment resistance has increased, with the increase of size and number of biscuit. Performance of joints with PU adhesive had better than PVA and UF. Highest bending moment resistance were obtained from joints glued with PU adhesive, size of biscuit 20 and 2 connectors. The results also indicated that joints made with biscuit and glued with PU had higher resistance than wooden dowel joints.

Keywords


[1]     Atar, M., Ozcifci, A., Altinok, M. and Celikel, U. 2009. Determination of diagonal compression and tension performances for case furniture corner joints constructed with wood biscuits. Materials and Design, 30: 665-670.
[2]     Kociszewski, M. 2005. Stiffness and load capacity of biscuit corner joints. Folia Forestalia Polonica, 36: 39-47.
[3]     Vassiliou, V. and Barboutis, L. 2008. Strength of furniture joints constructed with wood biscuits. Proceeding Papers From International Conference Of NABYTOK. Faculty wood science and technology, technical university in Zvolen.
[4]     Tankut, A. N. and Tankut, N. 2004. Effect of some factors on the strength of furniture corner joints constructed with wood biscuits. Turkish Journal of Agriculture and Forestry, 28:301–309.
[5]     Tankut, A. N. and Tankut, N. 2009. Investigations the effects of fastener, glue, and composite material types on the strength of corner joints in case–type furniture construction. Material Design, 30:4175–82.
[6]     Ebrahimi, G. 2009. Engineering design of wood structures. Tehran university publication, 491 pp. (In Persian). Standard Test Methods for Specific Gravity of Wood and Wood–Base Materials, Annual Book of ASTM Standard, D 2395, 1999.
[7]     Standard Test Methods for Small Clear Specimens of Timber. Annual Book of ASTM Standard, D 143. 2000.
[8]     Eckelman, C. A., Erdil, Y. Z. and Zhang, J., 2002. Withdrawal and bending strength of dowel joints constructed of plywood and oriented strand board. Forest products journal, 52 (9): 66-74.
[9]     Dalvand, M., Ebrahimi, GH., Tajvidi, M. and Layeghi, M. 2013. Bending moment resistance of dowel corner joints in case-type furniture under diagonal compression load. Journal of Forestry Research. Accepted for publication.
[10] Eckelman, C. A. 2003. Textbook of product engineering and strength design of furniture. West Lafayette (IN): Purdue University Press.