応力を受けている木材の収縮,膨潤(2) : 引張応力

島根農科大学研究報告 Volume 4 Page 93-96 published_at 1956-05-30
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Title
応力を受けている木材の収縮,膨潤(2) : 引張応力
Title
The Shrinking and Swelling of Wood under Stress(2) : Tensile Stress
Title Transcription
オウリョク オ ウケテイル モクザイ ノ シュウシュク ボウジュン 2 ヒッパリ オウリョク
Creator
Okusa Katsumi
Hayashi Shozo
Kosako Yoshihiko
Source Title
島根農科大学研究報告
Volume 4
Start Page 93
End Page 96
Journal Identifire
ISSN 05598311
Descriptions
In this work, the effect of dead tensile stress on the shrinking and the swelling of wood was examined and the following results being obtained: the coefficient of shrinking (α) becomes smaller and the coefficient of swelling (β) becomes larger in proportion to the increase of stress. This means that wood became set in the stretched condition caused by the tensile stress.
Generally speaking, if wood is stretched below its proportional limit, it regains the original dimention when the load is removed. However, wood may act as a plastic material under prolonged strain, and as a result a permanent deformation may form, even though the load were never great enough to strain the wood beyond its proportional limit. And hence, we investigated that permanent deformation of wood in moisture-equilibrium state which is caused by the dead tensile stress. The value obtained was negligible even under maximum stress (15kg / <cm>^2) used in the firstly-mentioned examination.
Language
jpn
Resource Type departmental bulletin paper
Publisher
島根農科大学
The Shimane Agricultural College
Date of Issued 1956-05-30
Access Rights open access
Relation
[NCID] AN00108241
Remark A,Bを含む