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Measurements of the Solid Viscosities of Metals through the Flexural Vibrations of a Bar.
https://jaxa.repo.nii.ac.jp/records/35463
https://jaxa.repo.nii.ac.jp/records/35463575ed355-edad-4358-b127-8f3a561517e1
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
SA4147154.pdf (1.5 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||
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| 公開日 | 2015-03-26 | |||||||||
| タイトル | ||||||||||
| タイトル | Measurements of the Solid Viscosities of Metals through the Flexural Vibrations of a Bar. | |||||||||
| 言語 | en | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||
| 資源タイプ | departmental bulletin paper | |||||||||
| 著者 |
SEZAWA, Katsutada
× SEZAWA, Katsutada
× KUBO, Kei
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| 出版者 | ||||||||||
| 出版者 | 東京帝國大學航空研究所 | |||||||||
| 出版者（英） | ||||||||||
| 出版者 | Aeronautical Research Institute, Tokyo Imperial University | |||||||||
| 書誌情報 |
東京帝國大學航空研究所報告 en : Report of Aeronautical Research Institute, Tokyo Imperial University 巻 7, 号 89, p. 195-231, 発行日 1932-12 |
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| 抄録（英） | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | The present investigation aimed at the experimental determination of the coefficients of solid viscosities of aluminium, duralmin, copper, and brass by means of the flexural vibrations of a bar, the resistance of a solid body due to damping being assumed to be proportional to the velocity of the deformation of that body. In analysing the result, the mathematical formula, deduced by one of the authors a few years ago, was employed. The experiment showed that the coefficient of solid viscosity is as small as 10^6 in C. G. S. units. This suggests that the resonance condition of a flying machine is detrimental to its behaviour, as no dissipation energy is radiated outwards from its boundary, while, at the same time the damping due to internal viscosity is too small in such a body. The experiment also showed that the damping constants of metals, even in such a high vacuum as 1/2000mm of mercury column, depends on the amplitude of the vibrations. The greater the amplitude, the greater becomes the coefficient of the solid viscosity. With the exception of those made by Honda and Konno and also those by Iokibe and Sakai, few measurements of solid viscosities of metals have been made. The theoretical and experimental investigations carried out by Barus, Voigt, and Cady are neither complete nor very satisfying. In our recent studies in the problem of shocks transmitted in a bar and other solid bodies, special attention was paid to the question of solid viscosity, the numerical data concerning which are very scanty, notwithstanding the pressing need for them. Acting on Professor Iwamoto's advice the solid viscosities of some metals have been measured with unusual accuracy. The metals experimented with were aluminium, duralmin, copper, and brass. The pressure in the vacuum chamber in which the vibration tests were made was about 1/2000mm of mercury column. | |||||||||
| 書誌レコードID | ||||||||||
| 収録物識別子タイプ | NCID | |||||||||
| 収録物識別子 | AA00387631 | |||||||||
| 資料番号 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 資料番号: SA4147154000 | |||||||||
