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アイテム
抜け出し駆動力に注目した曲げ荷重を受けるセラミックスリーブ式焼嵌めローラーの軸抜け出しメカニズムの解明
https://doi.org/10.18997/00007803
https://doi.org/10.18997/00007803fc216ba2-8ba1-4fc7-999b-239290a0d6b9
| 名前 / ファイル | ライセンス | アクション |
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kou_k_479.pdf (3.4 MB)
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| アイテムタイプ | 学位論文 = Thesis or Dissertation(1) | |||||||||
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| 公開日 | 2020-06-12 | |||||||||
| 資源タイプ | ||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_db06 | |||||||||
| 資源タイプ | doctoral thesis | |||||||||
| タイトル | ||||||||||
| タイトル | Mechanism Clarification of Coming out of the Shaft from Shrink-Fitted Ceramic Sleeve Roller under Bending Load Focusing on the Driving out Force | |||||||||
| 言語 | en | |||||||||
| タイトル | ||||||||||
| タイトル | 抜け出し駆動力に注目した曲げ荷重を受けるセラミックスリーブ式焼嵌めローラーの軸抜け出しメカニズムの解明 | |||||||||
| 言語 | ja | |||||||||
| 言語 | ||||||||||
| 言語 | eng | |||||||||
| 著者 |
張, 国偉
× 張, 国偉
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| 抄録 | ||||||||||
| 内容記述タイプ | Abstract | |||||||||
| 内容記述 | Ceramic sleeve rollers have been developed recently to be used in steel manufacturing industries efficiently. Ceramics have high corrosion resistance, high heat resistance and high wear resistance. The ceramic cylinder and the steel shafts of both ends are joined together to form the ceramic sleeve roller. It is found that the shrink fitting method is the most suitable connecting method for the roller. However, since only small shrink fitting ratios can be applied due to the brittleness of the ceramics, coming out of the shaft from the sleeve was reported during repeated loadings. This new failure should be analyzed and prevented. Previously, the finite element method was used to analyze the coming out behavior. Then, the roller rotation was replaced by the load shifting on the fixed roller by the finite element method. Since the calculation time was very enormous, only few rotation cycles were conducted. To realize much more number of loading cycles to investigate the coming out mechanism, therefore, a two-dimensional simulation was conducted to reduce the calculation time and more than N = 40 cycles were investigated. Those studies have proved that the coming out behavior can be numerically realized on the two-dimensional and three-dimensional simulations, while few studies have been focused on clarifying the coming out mechanism and analyzing the driving out force generated on the shaft, which is also very important for the future design of the roller without coming out. This thesis is composed of total of 5 chapters and organized as follows. Chapter 1 gives an introduction of the coming out problem of the shaft from the ceramic sleeve and the finite element method. Also gives an overview of previous studies on the coming out phenomenon. Then research purpose of this thesis is introduced, focusing on clarification of the coming out mechanism of the shaft from the ceramic sleeve and analysis of the driving out force generated on the shaft under bending load. In Chapter 2, to find out the coming out mechanism of the shaft from the sleeve with less computational time in a much more understandable way, a simplified two-dimensional model with a newly designed stopper is used to investigate the coming out mechanism. The two-dimensional shrink-fitted structure is considered by replacing the shaft with the inner plate and by replacing the sleeve with the outer plate. The inner plate gradually comes out until it is stopped by the stopper under the standard simulation condition. This is because driving out force Fd is generated on the inner plate when the alternate load is applied and drives the shaft out gradually. Then the generation mechanism of driving out force is clarified with the help of the stopper. And Fd is also calculated. It is essential to calculate out the driving out force Fd to guide the design of the real model for the future study. Finally, the process of coming out is explained in terms of the residual displacement based on the deformation and the displacement of the inner plate （shaft） under a new loading method. In Chapter 3, before investigating the effects of the design factors on the driving out force by an actual three-dimensional model, it is useful to perform the analysis by a two-dimensional model. The effect of the shrink fitting ratio δ/d on the driving out force Fd of the inner plate （shaft） is investigated and discussed as well as several other parameters, such as load P, friction coefficient μ, shrink fitting ratio δ/d, shrink fitting length l, Young’s modulus of the inner plate （shaft） Ein. When designing an actual three-dimensional roller, it is sufficient to find the maximum value of the driving out force Fd and based on this value for the strength design of the structure for prevention of the coming out phenomenon. In Chapter 4, the actual three-dimensional model is considered to explore the coming out mechanism and to calculate the driving out force F 3D d. Here, a novel Ball-stopper installed outside of the shaft designed for the three-dimensional model originally fertilising the analysis of the generation mechanism of driving out force 3D d F and the calculation of 3D d F is introduced. The function of this kind of Ball-stopper is firstly proved by comparing with the two-dimensional model with an inner stopper used in Chapter 2 and Chapter 3. Then the generation mechanism of driving out force F 3D d is clarified and F 3D d is calculated out with the help of the Ball-stopper. Finally, Chapter 5 provides the major conclusions, the most significant outcomes and contributions and suggestions for future works. | |||||||||
| 目次 | ||||||||||
| 内容記述タイプ | TableOfContents | |||||||||
| 内容記述 | 1 Introduction||2 Generation mechanism of the driving out force of the shaft from the shrink -fitted ceramic roll by introducing newly designed stopper||3 Effects of design factors on the driving out force generated steel shaft in a shrink-fitted ceramic roller||4 Failure mechanism of the coming out steel shaft from ceramic sleeve and calculation of the driving out force by three-dimensional finite element model | |||||||||
| 備考 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 九州工業大学博士学位論文 学位記番号：工博甲第479号 学位授与年月日：令和元年9月20日 | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | ceramic sleeve roller | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | comging out | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | stopper | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | driving out force | |||||||||
| キーワード | ||||||||||
| 主題Scheme | Other | |||||||||
| 主題 | mechanism | |||||||||
| アドバイザー | ||||||||||
| 野田, 尚昭 | ||||||||||
| 学位授与番号 | ||||||||||
| 学位授与番号 | 甲第479号 | |||||||||
| 学位名 | ||||||||||
| 学位名 | 博士（工学） | |||||||||
| 学位授与年月日 | ||||||||||
| 学位授与年月日 | 2020-03-25 | |||||||||
| 学位授与機関 | ||||||||||
| 学位授与機関識別子Scheme | kakenhi | |||||||||
| 学位授与機関識別子 | 17104 | |||||||||
| 学位授与機関名 | 九州工業大学大学 | |||||||||
| 学位授与年度 | ||||||||||
| 内容記述タイプ | Other | |||||||||
| 内容記述 | 令和元年度 | |||||||||
| 出版タイプ | ||||||||||
| 出版タイプ | VoR | |||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||
| 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 | |||||||||
| ID登録 | ||||||||||
| ID登録 | 10.18997/00007803 | |||||||||
| ID登録タイプ | JaLC | |||||||||
