集成材の耐久性に関する研究 : 集成材の平面曲げ疲労強度について

概要

論文の詳細を見る
In the present report we have experimented on the bending fatigue strength of glued-laminated wood which is made of Japanese cypress and is glued with urea resin or phenol resin. For comparison, same experiments have been carried out also on solid Japanese cypress and beech with controled moisture content and air dried. Also we have made consideration on the fatigue notch factor on these specimens having two kinds of holes. These researches have been done by the Nishihara's Fatigue Testing Machine for Repeated Bending of Plate. The results obtained are as follows : (1) The fatigue strength of flatsawn grain specimens is a little larger than that of edge grain specimens in most cases. (2) The glued-laminated wood with urea resin excels that with phenol resin in fatigue strength. (3) The fatigue strength of the glued-laminated wood with urea resin is 1・4 times larger than that of solid wood at the 10^7 cycles, and also that of phenol resin is 1・3 times.(4) The fatigue strength of the specimens with holes of diameter d=7・1 mm is larger than that of 2・6 mm.(5) The fatigue notch factor for solid Japanese cypress is smaller than 1. And that of glued-laminated wood is smaller than 1 or approximately equal to 1. (6) The specimen of solid Japanese cypress having a small hole with a diameter of 2・6 mm is not influenced with the hole in fatigue strength.(7) The glued-laminated wood specimen having a small hole with a diameter of 2・6 mm is not influenced in the fatigue strength at low stress levels.
社団法人日本材料学会の論文
1962-02-15

集成材の耐久性に関する研究 : 集成材の平面曲げ疲労強度について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク