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海水中におけるロープ用鋼のフレッチングと疲労
https://fra.repo.nii.ac.jp/records/2011523
https://fra.repo.nii.ac.jp/records/2011523558bc89c-4908-4ca9-be4a-54aded24cdaf
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-10-11 | |||||
| タイトル | ||||||
| タイトル | 海水中におけるロープ用鋼のフレッチングと疲労 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Fretting and fatigue of a roping steel in seawater | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | open access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
| 著者 |
竹内, 正明
× 竹内, 正明 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Numerous inter-wire contacts in steel ropes are sites for fretting. High tensile roping steel wires (UTS 1770 MPa grade) were tested in fluctuating tension in air and seawater with a fretting device consisting of a pair of bridges constructed from the same wire clamped onto the specimen. The relative effects of fretting and corrosion on the fatigue behaviour were investigated. The effectiveness of cathodic protection and galvanising in alleviating the fatigue damage was assessed. Fretting fatigue in seawater had a serious damaging effect on the steel wire, reducing the fatigue life at stresses well below the fatigue limit in air. In seawater fretting fatigue was much more damaging than corrosion fatigue. Fretting enhanced crack growth rates in the initial stages in both the environments. In seawater the initial crack growth rate was greater than that in air. Chemical and electrochemical effects played a major role in the fretting fatigue failure in seawater. Cathodic protection at optimum potentials had a dramatic effect in restoring the fatigue strength. The application of cathodic protection retarded the initial crack growth rate. However, if the crack grew beyond a certain depth, which was found to be 30 um, the effectiveness of cathodic protection was considerably reduced. A galvanised coating significantly improved the fatigue strength in seawater by suppressing the electrochemical attack. When the ungalvanised wire was is contact with galvanized wire bridges the sacrificial protection was the same as if the wire were galvanised. However, in air the coating reduced the fatigue strength to some extent. This was attributed to the existence of the brittle Fe-Zn alloy layer. The deleterious effect of the alloy layer was more dominant than the effect of the residual stress which was altered by the galvanising on the fatigue performance. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 水産大学校研究報告 en : The Journal of the Shimonoseki University of Fisheries 巻 38, 号 2/3, p. 71-131, ページ数 61, 発行日 1990-03 |
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| 出版者 | ||||||
| 出版者 | 水産大学校 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | the Shimonoseki University of Fisheries | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0370-9361 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00124678 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | fishu_k_38_71 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010460581 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
