スパイラルワインディング法を用いて製造した円筒形LVLの製造条件と機械的性質(<特集>木質材料)

概要

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The mechanical properties in bending and in compression of full size cylindrically laminated veneer lumbers(C-LVL) made by spiral winding method were tested. The C-LVLs have about 300 mm outer diameter, 25mm wall thickness, and 3600 mm length. The results obtained are as follows: 1)The modulus of elasticity(MOE) of C-LVL depends on the species of veneer raw materials, that is, MOE of C-LVL was the same as the MOE of solid lumber of the same species. 2)The number of plies affects the modulus of rupture(MOR) and the mode of failure of C-LVL. It has no effect on MOE. 3)The interlocked grain structure of C-LVL with ± 10 degree in alternate layers effectively prevented decrease in MOE of C-LVL compared to that of solid lumber. 4)There was little effect on MOE or MOR by the addition of radial filler in C-LVL with 10 plies or more. 5)The properties in compression is about equal to those in bending. In the compression test, buckling failure was observed. These results show that C-LVL is suitable for structural uses, especially as building and construction posts.
社団法人日本材料学会の論文
1998-04-15