17 竹材の性質に関する研究(第4報) : 竹片圧縮試験片の型の決定に関する研究

概要

論文の詳細を見る
We must decide the form of shot specimen, when study the compressive strength of bamboo piece. This study is made on the optimum height-thickness ratio (h/a) and width-thickness ratio (b/a) of specimen in the test of compressive strength parallel with the grain of small clear specimen, by mean of investigating the maximum crushing strength and types of failure that occur in the test on MA-DAKE, MOSO-CHIKU and HA-CHIKU. The results and conclusion of this study are following. (1) The compressive strength of bamboo piece is not influenced by b/a, but decrease with decreasing h/a lineally. (See Fig. 2) Therefore there is not optimum form of specimen in the test of compressive strength parallel with the grain. (2) The appearance-rate of normal type (type"b") of failure, in the test of compressive strength parallel with the grain, is maximum at b/a=1.0〜1.5 and h/a=2.0〜2.5. (see Fig. 3b, 3a) (3) Author concluded that the optimum form of small, clear and short specimen in the test of compressive strength parallel with the grain of bamboo piece is b/a=1 and h/a=2.
日本森林学会の論文
1951-02-25