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Title Transcription
ネジリ シケン ニヨル モクザイ ノ センダン ダンセイ ケイスウ ノ ソクテイ ノ カンリャクカ 2 コグチメン ノ センダン ダンセイ ケイスウ ノ ソクテイ
Title Alternative (English)
Simplification of the measurement method of the shear modulus of wood by torsion test II, Measurement of the Shear modulus on the radial-tangential plane
File
language
jpn
Author
Ohta, Masamitsu
Description
In a previous paper, we suggested that the shear moduli of the LT-(longitudinal-tangential)plane or LR-(longitudinal-radial) plane can be measured approximately from one torsional moment-shear strain relationship. This measurement method, however, cannot be applied for the specimen with a strong orthotropy between the planes along the torsional axis, and we thought that the shear modulus of the RT-(radial-tangential) plane cannot be given properly by this approximation method. In this paper, hence, we examined the feasibility in measuring the shear modulus of the RT-plane only from the torsional momentshear strain relationship of the RT-plane.
Sitka spruce (Picea sitchensis Carr.) and Konara (Japanese oak, Quercus serrata Murray) were used for the specimens. These specimens were twisted along the radial direction. Shear moduli on the side planes were calculated by substituting the torsional moment-shear strain relationships at the side planes into the solution of differential equations for the torsion of orthotropic rectangular bar. On the other hand, an approximating equation for deriving the shear modulus of the RT-plane was proposed from the hypothesis that the ratio of the shear modulus of the RT-plane to that of the LR-plane is in a limited range, and the shear modulus given by this equation was compared with that derived from the rigorous solution.
We thought that the shear modulus of RT-plane can be obtained properly by the approximating equation proposed here when the aspect ratio of the specimen rs determined properly.

Journal Title
島根大学総合理工学部紀要. シリーズA
Volume
32
Start Page
185
End Page
191
ISSN
13427113
Published Date
1998-12-24
NCID
AA11157087
Publisher
島根大学総合理工学部
Publisher Aalternative
Interdisciplinary Faculty of Science and Engineering, Shimane University
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Interdisciplinary Graduate School of Science and Engineering
Remark
30-41+ / 1997-2007
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