The Viscoelastic Properties of Wood Used for Musical Instruments II
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概要
- 論文の詳細を見る
この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。In order to make clear the relation between the acoustic properties and the fine structures of wood, the present paper deals with the dynamic mechanical and dielectric properties in relation to the angle of micellar orientation and the degree of crystallinity estimated by X-ray measurements of wood using for the musical instruments (Sitka spruce) and other few wood species (Hinoki, Sugi and Hoonoki). The dynamic elastic modulus, loss modulus, dielectric constant and loss factor for Sitka spruce were large in magnitude for its specific gravity compared with the other species. The mean angle of micellar orientation and the half width in the distribution function of spiral angle for Sitka spruce were the smallest among the coniferous wood species used. The crystallinity indexes calculated from transmission method for Sitka spruce and Hinoki were smaller than those for Sugi and Hoonoki. From these results, it may be concluded that the principal cause which the dynamic elastic and loss modulus for Sitka spruce are large in magnitude for its density is due to its small angle of micellar orientation and/or its uniformity in the gross structures.
- 京都大学の論文
- 1973-03-15
著者
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Aoki Tsutomu
Division Of Wood Physics Wood Research Institute Kyoto University
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Yamada Tadashi
Division Of Wood Physics Wood Research Institute Kyoto University
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