Water Resistance of Welded Birch Wood Produced by Linear Friction
Öz
Aim of study: In this study, it was aimed to determine the shear strength after water immersion and observe bond-line density of the welded birch wood.
Material and methods: 24 welded samples of dimensions 200x20x20 mm3 (LxTxR) were prepared from sapwood of birch wood (Betula pendula). Shear strength of welded birch at 24h and 48h water soaking were investigated.X-Ray CT-scanning was used to monitor the density profile of welded bond-line.
Main results: The results showed that shear strength decreased slightly with increasing water immersion time. The decreasing of the average shear strength, caused by immersion for 24h and 48h were 60.25% and 78.9%, respectively, compared to control sample. With the welding process, a significant change in density was observed in the welding bond-line. As a result, the X-Ray CT scanner shows that it works effectively on wood material.
Highlights: The results of this research revealed the applicability of a new method alternative to traditional mechanical fasteners (nail, screw etc.) or gluing. The availability of welding combining method in the field of wood engineering should be explored widely and more studies are recommended for appropriate parameters.
Anahtar Kelimeler
Birch Wood, X-Ray CT Scanner, Linear Welding, Water Resistance
Destekleyen Kurum
the Scientific and Technological Research Council of Turkey (TUBITAK- 2219/BIDEB, 2019)
Kaynakça
- Amiroua, S., Pizzi, A., Belleville, B. & Delmotted, L. (2017). Water resistance of natural joint of spruce produced by linear friction welding without any treatment, International Wood Products Journal, 8(4), 201-207.
- EN 205. Adhesives – wood adhesives for non-structural applications – determination of tensile shear strength of lap joints. Brussels: European Committee for Standardization.
- Ganne-Chedeville, C. (2008). Soudage linéaire du bois étude et compréhension des modifications physico-chimiques et développement d’une technologie d’assemblage innovante, PhD thesis, Université Henri Poincaré – Nancy.
- Ganne-Chedeville, C., Pizzi, A., Thomas, A., Leban, J-F., Bocquet, J-F., Despres, A. & Mansouri, H. R. (2005). Parameter interactions in two-block welding and the wood nail concept in wood dowel welding. Journal of Adhesion Science and Technology, 19, 1157-1174.
- Gfeller, B., Zanetti, M., Properzi, M., Pizzi, A., Pichelin, F., Lehmann, M. & Delmotte, L. (2003). Wood bonding by vibrational welding, Journal of Adhesion Science Technology, 17(11), 1573-1589.
- Heräjärvi, H. (2002). Properties of birch (Betula pendula, B. pubescens) for sawmilling and further processing in Finland. The finnish Forest Research Institute, Research Papers, 35(4), 469-485
- Leban, J.-M., Pizzi, A., Wieland, S., Zanetti, M., Properzi, M. & Pichelin, F. (2004). X-Ray microdensitometry analysis of vibration welded wood. Journal of Adhesion Science Technology, (18), 673-685.
- Mansouri, H. R., Omrani, P. & Pizzi, A. (2009). Improving the water resistance of linear vibration-welded wood joints. Journal of Adhesion Science Technology, 23, 63-70.
- Mansouri, H. R., Pizzi, A., Leban, J. M., Delmotte, L., Lindgren, O. & Vaziri, M. (2011). Causes for the Improved Water Resistance in Pine Wood Linear Welded Joints. Journal of Adhesion Science and Technology, 25,1987-1995.
- Mansouri, H. R., Pizzi, A., Leban, J. M., Delmotte, L. O. & Vaziri, M. (2011). Causes for the improved water resistance in pine wood linear welded joints. Journal of Adhesion Science and Technology, 26(19) 1987-1995.