ダウンロード数 : ?
タイトルヨミ
モクザイ ノ ヒッパリ クリープ ニオケル ハカイ ジカン イゾンセイ
日本語以外のタイトル
On the Time-Dependence of Fracture in Tensile-Creep of Wood
ファイル
言語
日本語
著者
藤田 晋輔
高橋 徹
桜井 敏夫
内容記述(抄録等)
The fluctuation phenomena were mvestigated experimentally on the tensile creep fracture in Sugi wood(Cryptomeria japonica D. DON.)
The size and shape of our specimens and experimental apparatus were shown in Fig. 1 and Photo. 1 respectively. The tensile creep test of about 90 specimens were measure by three constant load (222.8g/<mm>^2, 201.4g/<mm>^2 and 185.0g/<mm>^2). Experimental temperature were 20 ± 1 ℃.
From the standpoint of stochastic process, the probability of occurrence of fracture in unit time after the lapse of time t, m(t), are given by tangent of log P-t diagram, when P(t) is probability of occurrence in the limited case of our creep test. and (4). Fig. 2 shows log P-t diagram in the limited case of our creep test.
The elapsed time until fracture occurres under constant load were measured by a stop-watch and electrical-clock. Our experimental results in tensile strength and creep test are shown in Table 1 and 2 , respectively. As the resuls of analysis of variance, it became clear that fluctuations of fracture time in creep are not attributed to the fluctuations of annual ring breadth between each specimen. From the result in Fig. 2, we may say that the value of m under the constant load decreases rapidly in the beginning of loading and approaches to an almost constant value.
掲載誌名
島根大学農学部研究報告
2
開始ページ
86
終了ページ
91
ISSN
0370940X
発行日
1968-12-15
NCID
AN00108015
出版者
島根大学農学部
出版者別表記
Shimane University, Faculty of Agriculture
資料タイプ
紀要論文
部局
生物資源科学部
他の一覧
このエントリーをはてなブックマークに追加