低温における木材および木質材料の曲げ強度について

概要

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In this study, six species of wood and four wood based materials were tested in bending from -180 to +20℃, and the influence of temperature on bending strength (F_b) and Young's modulus (E_b) was discussed. In the case of wood, not only the effect of temperature but also that of specific gravity on F_b and E_b were discussed. The moisture content of specimens was controlled to about 4% at 20℃ in a vacuum, and the temperature during bending tests was regulated with liquid nitrogen and nitrogen gas. The results obtained are as follows. (1) In the case of wood, E_b arid F_b are representable by the equations (3) and (4) respectively, containing two factors, specific gravity (ρ) and test temperature (θ℃). (2) The effect of temperature on E_b for wood based materials tested is illustrated on Figures 1 to 6. As the results, E_b increases as temperature falls, and their relation can be expressed approximately by a regression straight line for each wood based material. (3) Figure 7 shows the relation between F_b for wood based materials and test temperature.
社団法人日本材料学会の論文
1983-08-15