Investigation of the effect of modified poly vinyl acetate on the stress carrying capacity of corner joints in the wood members joined with dowel
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
The aim of this study was to determine stress carrying capacity of doweled corner joints in wood members made with modified resin (polyvinyl acetate) and its comparison with unmodified ones. Joint members were out of European silver Fir (Abies alba) and dowels were made from Beech and poplar woods as variables in this study. Diameter of dowel had three levels in size, namely 6, 8 and 10 mm. The experimental joints were tested under diagonal compression loads. Results have shown that stress carrying capacity of tested joints made with modified glue is more than unmodified ones. Maximum stress capacity was observed in the joints of beech which with 10 mm in diameter dowels. Based on the results, the highest strength was belonging to those joints made with beech wood glued with modified resin containing 10 mm dowel. Furthermore, the lowest strength was belonging to poplar joints made with unmodified resins and 6 mm dowels. The improvement can be due to increased viscosity and controlled penetration of the resin into the wood structure and hence better bonding. Concerning the wood species, beech had the highest stress carrying capacity that it can attributed to its higher density.
Language:
Persian
Published:
Iranian Journal of Wood and Paper Industries, Volume:9 Issue: 3, 2018
Pages:
323 to 336
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